±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Outp
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19-4807; 7/09
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
MAX16064 fully integrated 4-channel digital power-supply controller monitor that connected four power supplies provide complete digital configurability. interfacing power-supply reference input feedback node, output enable, MAX16064 takes control power supply provide tracking, soft-start, sequencing, margining, dynamic adjustment output voltage. Power-supply sequencing performed autonomously controlled over PMBusinterface. Sequencing controlled during power-down well power-up. Multiple MAX16064s combined autonomously sequence more supplies. sequencing order stored external configuration EEPROM sequence order changes reprogrammed without changing layout. MAX16064 features internal temperature sensor providing additional level system monitoring. Other features include reset output SMBusalert output. Each channel MAX16064 includes accurate 12-bit analog-to-digital converter (ADC) input differential amplifier accurately monitoring reporting voltage load without being influenced difference ground potentials. integrated 12-bit digital-to-analog converter (DAC) margin power supplies dynamically adjust output voltage using closed-loop control system provide output-voltage accuracy ±0.3%. user-programmable registers provide flexible accurate control time events such delay time transition period, monitoring overvoltage undervoltage, overtemperature fault warning handling. closed-loop operation also programmable make sure MAX16064 works with existing power supply provide superior regulation accuracy accurate margining. MAX16064 operates using PMBus-compliant communication protocol. device programmed using this protocol with free graphic-user interface (GUI) available from Maxim website that significantly reduces development time. Once configuration complete, results saved into EEPROM loaded into device through PMBus power-up. This allows remote configuration power supply using MAX16064, replacing expensive recalls field service. MAX16064 programmed with distinct addresses support large systems. MAX16064 offered space-saving, 36-pin, lead-free, TQFN package fully specified from -40°C +85°C.
Features
Accurate Voltage Output Control (AVOC) Controls Output Voltage with ±0.3% Accuracy PMBus Interface Programming, Monitoring, Sequencing Down, Margining Output Voltage Temperature Monitoring with Adjustable Monitor Rate Programmable Soft-Start Soft-Stop Ramp Rates Power-Supply Control using REFIN Terminals Master-Slave Clocking Option Provides Accurate Timing Reference Across Multiple Devices External EEPROM Interface Autoboot Power-Up 3.0V 3.6V Operating Voltage Range 6mm, 36-Pin TQFN Package
MAX16064
Applications
Routers Servers Storage Systems Telecom/Networking DC-DC Modules Power Supplies
Ordering Information
PART MAX16064ETX+ TEMP RANGE -40°C +85°C PIN-PACKAGE TQFN-EP*
+Denotes lead(Pb)-free/RoHS-compliant package. Exposed pad.
Configuration Typical Operating Circuit appears data sheet.
PMBus trademark SMIF, Inc. SMBus trademark Intel Corp.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim Direct 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
ABSOLUTE MAXIMUM RATINGS
AVDD, DVDD AGND .-0.3V AVDD DVDD.-0.3V +0.3V AGND DGND.-0.3V +0.3V AGND1 DGND.-0.3V +0.3V RS_+, RS_- AGND.-0.3V RS_C, A1/SCLE, A2/SDAE, A3/CONTROL AGND .-0.3V (AVDD 0.3V) RESET, SMBALERT, ENOUT_ AGND.-0.3V SCL, DGND .-0.3V DACOUT_, CLKIO, REFO AGND.-0.3V (AVDD 0.3V) DACOUT_ Current .10mA Current .-1mA +50mA Input/Output Current (all other pins) .20mA Continuous Power Dissipation +70°C) 36-Pin TQFN (derate 35.7mW/°C above +70°C) .2857mW Thermal Resistance (Note .28°C/W .1°C/W Operating Temperature Range .-40°C +85°C Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10s) .+300°C
Note Package thermal resistances were obtained using method described JEDEC specification JESD51-7, using fourlayer board. detailed information package thermal considerations, refer
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VAVDD VDVDD 3.0V 3.6V, VRS_+ VRS_- VRS_- -40°C +85°C, unless otherwise specified. Typical values VAVDD VDVDD 3.3V, +25°C.) (Note
PARAMETER AVDD/DVDD Operating Voltage Range AVDD Undervoltage Lockout (AVDD Rising) AVDD Undervoltage Lockout Hysteresis AVDD DVDD Total Supply Current OUTPUT-VOLTAGE SENSING Voltage Regulation Accuracy Range) +25°C, VRS_+ 1.0V, VRS_- -40°C +85°C, VRS_+ 1.0V, VRS_- +25°C, VRS_+ 2.5V, VRS_- -40°C +85°C, VRS_+ 2.5V, VRS_- -16.5 -250 range, VRS_+ -0.25V 5.5V range, VRS_+ -0.25V +5.5V 5.5V range, VRS_- -0.25V +0.25V +16.5 +250 +100 VUVLO VUVLO-HYS VRS_+ VRS_- SYMBOL CONDITIONS 2.75 18.5 2.95 UNITS
Voltage Regulation Accuracy (5.5V Range) RS_+, RS_- Differential Mode Range RS_- Differential Voltage RS_+ Input Bias Current RS_- Input Bias Current
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD VDVDD 3.0V 3.6V, VRS_+ VRS_- VRS_- -40°C +85°C, unless otherwise specified. Typical values VAVDD VDVDD 3.3V, +25°C.) (Note
PARAMETER Temperature Sensing Accuracy INTERNAL OSCILLATOR Frequency Resolution INTERNAL REFERENCE Reference Voltage Resolution Differential Nonlinearity Maximum Output-Voltage Range Capacitive Load Output-Voltage Slew Rate Output Resistance Driving Capability Output Leakage Current CLKIO Input Logic-Low Voltage Input Logic-High Voltage Input Bias Current Input Clock Duty Cycle Output Voltage Output High Leakage CLKIO Pullup Voltage CLKIO Input Frequency Range CLKIO Output Frequency ENABLE INPUT (EN) Falling Threshold Voltage Rising Threshold Voltage Input Leakage Current OUTPUTS (ENOUT_, RESET, SMBALERT) Output Voltage Output Leakage ISINK 10mA VAVDD VDVDD 1.1V, ISINK 100µA VENOUT_ VEN_TH 1.17 1.175 -0.25 1.21 1.23 1.23 1.281 +0.25 fEXT_CLK CLKIO output mode, ISINK VCLKIO 3.6V VCLKIO 3.6V 1000 output 100mV; output error 25mV output switch open, VDACOUT_ VREF -250 load -2.5 VREF 0.35 +250 +2.5 Bits V/µs VREF +25°C 2.048 Bits SYMBOL CONDITIONS +85°C UNITS INTERNAL TEMPERATURE SENSOR
MAX16064
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD VDVDD 3.0V 3.6V, VRS_+ VRS_- VRS_- -40°C +85°C, unless otherwise specified. Typical values VAVDD VDVDD 3.3V, +25°C.) (Note
PARAMETER Input Logic-Low Voltage Input Logic-Low Hysteresis Input Logic-High Voltage Input Logic-High Hysteresis Input Leakage Current SMBus INTERFACE (SCL, SDA) (Note SCL, Input Voltage SCL, Input High Voltage SCL, Input Leakage Current (Per Pin) Input Capacitance SCL, Output Voltage SMBUS TIMING Serial-Clock Frequency Free Time Between STOP START Condition START Condition Setup Time START Condition Hold Time STOP Condition Setup Time Clock Period Clock High Period Data Setup Time Output Fall Time Data Hold Time Pulse Width Spike Suppressed SMBus Timeout OTHER TIMING PARAMETERS PMBus Command Response Time Fault Response Time Recovery Time After Device Reset tPMB_RSP tFAULT_RSP tRST_WAIT fSCL tBUF tSU:STA tHD:STA tSU:STO tLOW tHIGH tSU:DAT tHD:DAT tTIMEOUT SMBCLK time reset CBUS 10pF 400pF From falling change ISINK Input voltage falling Input voltage rising Device powered unpowered, VAVDD 3.6V, VSCL VSDA VAVDD VAVDD SYMBOL CONDITIONS UNITS ADDRESS PINS (A1/SCLE, A2/SDAE, A3/CONTROL)
Note 100% production tested +25°C. Limits over temperature guaranteed design. Note MAX16064 supports clock stretching.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
Typical Operating Characteristics
(VAVDD VDVDD 3.3V, +25°C, unless otherwise noted.)
TOTAL SUPPLY CURRENT SUPPLY VOLTAGE
MAX16064 toc01
MAX16064
NORMALIZED THRESHOLD TEMPERATURE
MAX16064 toc02
NORMALIZED RESET TIMEOUT PERIOD TEMPERATURE
1.08 NORMALIZED RESET TIMEOUT 1.06 1.04 1.02 1.00 0.98 0.96 0.94 0.92 NORMALIZED +25NC
MAX16064 toc03
TOTAL SUPPLY CURRENT (mA)
1.010 1.008 NORMALIZED THRESHOLD 1.006 1.004 1.002 1.000 0.998 0.996 0.994 0.992 NORMALIZED +25NC
1.10
-40NC
+85NC
+25NC
VAVDD VDVDD
0.990 TEMPERATURE (NC)
0.90 TEMPERATURE (NC)
UV_FAULT RESET RESPONSE
MAX16064 toc04
ENOUT_ OUTPUT VOLTAGE SINK CURRENT
MAX16064 toc05
POWER SUPPLIES OUTPUT ACCURACY TEMPERATURE
POWER SUPPLIES OUTPUT ACCURACY -0.1 -0.2 -0.3 -0.4 -0.5 VOUT0 VOUT1 3.3V VOUT3 1.1V VOUT2 1.8V
MAX16064 toc06
ENOUT_ OUTPUT VOLTAGE
VOUT0 2V/div
3.3V RESET 2V/div
1ms/div
ISINK (mA)
TEMPERATURE (NC)
ENOUT_WITH AVDD DVDD RISING
MAX16064 toc07
ENOUT_ WITH AVDD DVDD FALLING
MAX16064 toc08
AVDD DVDD RISING 3.3V/ms
AVDD DVDD 1V/div
AVDD DVDD 1V/div
ENOUT1,2,3,4 2V/div 200ms/div 400Fs/div
ENOUT1,2,3,4 2V/div
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Typical Operating Characteristics (continued)
(VAVDD VDVDD 3.3V, +25°C, unless otherwise noted.)
REFIN MODE SOFT-START WITH SEQUENCING REFIN MODE SOFT-STOP WITH SEQUENCING
MAX16064 toc09
MAX16064 toc10
VOUT0 VOUT1 3.3V VOUT2 1.8V
VOUT0 VOUT1 3.3V VOUT2 1.8V VOUT3 1.1V
VOUT3 1.1V
2ms/div
2ms/div
REFIN MODE SOFT-STOP WITH TRACKING
MAX16064 toc11
REFIN MODE OPERATION WITH SEQUENCING
MAX16064 toc12
VOUT0
VOUT0
VOUT1 3.3V VOUT2 1.8V VOUT3 1.1V
VOUT1 3.3V VOUT2 1.8V VOUT3 1.1V
2ms/div
40ms/div
REFIN MODE SOFT-START FROM WITH SEQUENCING
REFIN MODE SOFT-STOP FROM WITH SEQUENCING
A3/CONTROL 5V/div VOUT0
MAX16064 toc13
MAX16064 toc14
A3/CONTROL 5V/div VOUT0
VOUT1 3.3V VOUT2 1.8V VOUT3 1.1V
VOUT1 3.3V VOUT2 1.8V VOUT3 1.1V
2ms/div
2ms/div
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
Typical Operating Characteristics (continued)
(VAVDD VDVDD 3.3V, +25°C, unless otherwise noted.)
REFIN MODE MARGINING 500mV HIGH 1mV/µs REFIN MODE MARGINING 500mV 1mV/µs
MAX16064
MAX16064 toc15
MAX16064 toc16
VOUT0 1V/div
4.5V
VOUT0 1V/div
0.6V VDACOUT0 200mV/div
0.54V
VDACOUT0 200mV/div
400Fs/div
400Fs/div
MODE MARGINING HIGH FROM 5.5V
MAX16064 toc17
MODE MARGINING FROM 4.5V
MAX16064 toc18
VOUT0 1V/div
VOUT0 1V/div VDACOUT0 200mV/div
0.6V VDACOUT0 200mV/div
0.6V
400ms/div
400ms/div
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Description
NAME RS2RS2+ RS3+ RS3RS3C DACOUT1 AGND ENOUT0 FUNCTION Differential Remote-Sense Input Return DC-DC Output Voltage. Connect return terminal load. Differential Remote-Sense Input DC-DC Output Voltage. Connect load terminal where output must regulated. Differential Remote-Sense Input DC-DC Output Voltage. Connect load terminal where output must regulated. Differential Remote-Sense Input Return DC-DC Output Voltage. Connect return terminal load. Filter Capacitor VSENSE Amplifier Connect capacitor from RS3C AGND. Enable Input. ENOUT_ deasserted when voltage below 1.2V (typ). Used turn on/off controlled power supplies conjunction with PMBus OPERATION command. Analog Voltage Output Internal 12-Bit Connect TRIM, REFIN, DC-DC module adjust power-supply output voltage. High impedance shutdown. Analog Ground. Connect AGND AGND1 DGND externally close device. On/Off Signal Output Typically used turn on/off power supply. Controlled PMBus OPERATION command sequencer. configured either active-high active-low open-drain output. ENOUT_ Operation section. On/Off Signal Output Typically used turn on/off power supply. Controlled PMBus OPERATION command sequencer. configured either active-high active-low open-drain output. ENOUT_ Operation section. On/Off Signal Output Typically used turn on/off power supply. Controlled PMBus OPERATION command sequencer. configured either active-high active-low open-drain output. ENOUT_ Operation section. On/Off Signal Output Typically used turn on/off power supply. Controlled PMBus OPERATION command sequencer. configured either active-high active-low open-drain output. ENOUT_ Operation section. Clock Input/Output. User-configurable clock input/output signal. system controller provide clock input synchronize time bases multiple MAX16064 devices. Alternatively, MAX16064 provide 1MHz output clock other MAX16064s synchronization. MFR_MODE (D1h) section. When configured output, CLKIO open-drain output pullup resistor required. Dual-Functioned MAX16064 Slave Address Identifier (LSB) EEPROM Clock Output. MAX16064 Address Assignment External EEPROM Interface sections. Dual-Functioned MAX16064 Slave Address Identifier EEPROM Data Input/Output. MAX16064 Address Assignment External EEPROM Interface sections. Dual-Functioned MAX16064 Slave Address Identifier (MSB) Power-Supply On/Off Control Using MFR_MODE Command. MAX16064 Address Assignment A3/CONTROL Operation sections. Active-Low, Open-Drain Reset Output
ENOUT1
ENOUT2
ENOUT3
CLKIO
A1/SCLE A2/SDAE
A3/CONTROL RESET
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
Description (continued)
NAME SMBALERT DGND DVDD RSVD DACOUT3 AGND1 AVDD DACOUT2 RS1RS1+ RS1C REFO RS0+ RS0C RS0DACOUT0 RS2C SMBus Serial-Clock Input/Output SMBus Serial-Data Input/Output Digital Ground. Connect DGND AGND AGND1 externally close device. Digital Power-Supply Input. Connect capacitor from DVDD DGND. Reserved. Connect DVDD externally. Analog Voltage Output Internal 12-Bit Connect TRIM, REFIN, DC-DC module adjust power-supply output voltage. High impedance shutdown. Analog Ground. Connect AGND DGND externally close device. Analog Power-Supply Input. Connect capacitor from AVDD AGND. Analog Voltage Output Internal 12-Bit Connect TRIM, REFIN, DC-DC module adjust power-supply output voltage. High impedance shutdown. Differential Remote-Sense Input Return DC-DC Output Voltage. Connect return terminal load. Differential Remote-Sense Input DC-DC Output Voltage. Connect load terminal where output must regulated. Filter Capacitor VSENSE Amplifier Connect capacitor from RS1C AGND. Reference Output. Connect capacitor from REFO AGND. Differential Remote-Sense Input DC-DC Output Voltage. Connect load terminal where output must regulated. Filter Capacitor VSENSE Amplifier Connect capacitor from RS0C AGND. Differential Remote-Sense Input Return DC-DC Output Voltage. Connect return terminal load. Analog Voltage Output Internal 12-Bit Connect TRIM, REFIN, DC-DC module adjust power-supply output voltage. High impedance shutdown. Filter Capacitor VSENSE Amplifier Connect capacitor from RS2C AGND. Exposed Pad. Internally connected AGND. Connect ground plane power supplies best temperature measurement performance. FUNCTION Active-Low, Open-Drain Fault-Detection Interrupt Output
MAX16064
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
AVDD DVDD RSVD REFO
RS0+ CLK0 RS0RS0C RS1+ 12-BIT VOUT DACOUT0 ENOUT0
RS1RS1C RS2+
VOLTAGE SCALING
ENOUT1 12-BIT (SAR) DIGITAL COMPARATORS SEQUENCER 12-BIT VOUT DACOUT1
ENOUT2 12-BIT VOUT DACOUT2
RS2RS2C RS3+ INTERNAL TEMP SENSOR 12-BIT VOUT
ENOUT3 DACOUT3
RS3RS3C
RESET
1.2V PMBus DEFAULT MEMORY (EXTERNAL EEPROM) PAGE PAGE PAGE PAGE PAGE PMBus OPERATING MEMORY PAGE PAGE PAGE
PMBus CONTROL EXTERNAL EEPROM INTERFACE SMBus INTERFACE
MAX16064
A1/SCLE
A2/SDAE
A3/CONTROL
SMBALERT
DGND
AGND
AGND1
Figure MAX16064 Functional Diagram
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
Detailed Description
MAX16064 adds digital control functionality four power supplies. Using closed-loop control system, MAX16064 continuously adjust power-supply output voltages maintain ±0.3% output-voltage accuracy. MAX16064 also programmed sequence, track, margin each power supply. PMBus-compliant interface provides access configuration parameters MAX16064, including monitoring thresholds, sequence delays, soft-start soft-stop slew rates, output-voltage settings, on-chip temperature sensor, more. MAX16064s reside same PMBus bus, each controlling power supplies, under commands from PMBus system controller, shown Figure MAX16064s placed close power supplies they control that sensitive analog traces short less susceptible noise. power supplies also placed close load where they provide best transient response lowest losses with short power plane runs.
MAX16064
RS0+ RS0DACOUT0 ENOUT0 MAX16064 SYSTEM CONTROLLER SMBALERT RESET RS1+ RS1DACOUT1 ENOUT1 RS2+ RS2DACOUT2 ENOUT2 RS3+ RS3DACOUT3 ENOUT3
VOFB VOFB VOFB VOFB
POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
RS0+ RS0DACOUT0 ENOUT0 MAX16064 SMBALERT RESET RS1+ RS1DACOUT1 ENOUT1 RS2+ RS2DACOUT2 ENOUT2 RS3+ RS3DACOUT3 ENOUT3
VOFB VOFB VOFB VOFB
POWER SUPPLY (N-3)
POWER SUPPLY (N-2)
POWER SUPPLY (N-1)
POWER SUPPLY
Figure System Application Showing Multiple MAX16064s Controlling Power Supplies
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
MAX16064 Operating Modes
Reference Input (REFIN) Mode Figure shows connect MAX16064 reference voltage input typical power supply, allowing MAX16064 fully control power-supply output voltage. Connect DACOUT_ MAX16064 REFIN input power supply connect output-voltage terminals power supply RS_+ RS_- sense inputs MAX16064. sensed voltage RS_+ RS_- filtered internal resistor external capacitor connected RS_C, digitized 12-bit that uses accurate internal reference voltage. Normal operation begins follows: upon receiving OPERATION command turn-on signal from A3/CONTROL, MAX16064 waits programmed ON_DELAY time, then switches associated ENOUT_ output ramps power-supply output voltage target VOUT_COMMAND value precisely programmed tON_RISE time. This facilitates easy implementation tracking multiple output rails. reaching target output voltage, MAX16064 continuously monitors power-supply output voltage obtained RS_+ RS_- inputs, regulates within ±0.3% incrementing decrementing DACOUT_ output (0.5mV) time. MAX16064 output-voltage correction rate controlled MFR_MODE.1, VLTO, DAC_ACT_CNT, discussed Conversion, Monitoring, AVOC Adjustment Rates section. Once requested target power-supply voltage reached, margined down slew rate programmed VOUT_TRANSITION_RATE parameter. achieve this, MAX16064 increments decrements DACOUT_ output suitable number steps that depend programmed transition rate. number steps calculated from VOUT_SCALE_LOOP parameter, which must ratio power-supply output voltage power-supply reference voltage. This ratio same voltage-divider ratio implemented power supply from output voltage node inverting input error amplifier. This allows MAX16064 correctly calculate number DACOUT steps voltage increments/decrements step thus achieve programmed rise time transition time. Since reference voltage input provided MAX16064, REFIN mode provides complete control power supply terms soft-start, soft-stop, margining transitions.
Upon receiving OPERATION command turn-off signal from A3/CONTROL, MAX16064 waits programmed tOFF_DELAY time, ramps output voltage down zero programmed tOFF_FALL time, then deasserts ENOUT_ output. Each four power-supply converters delay parameters, sequencing accomplished loading different delay times each power supply.
Feedback (FB) Mode Some power-supply converters provide reference input. these applications, feedback node used instead. Connect DACOUT_ output MAX16064 feedback node (FB) through resistor shown Figure steady-state operation, MAX16064 controls power-supply voltage measured between RS_+ RS_- 0.3% accuracy adjusting DACOUT_ time (0.5mV), down required. This mode operation termed mode. Since MAX16064 does have control over power-supply error-amplifier reference voltage, this mode relies power-supply soft-start setting implement required soft-start time.
Upon receiving OPERATION command turn-on signal from A3/CONTROL, MAX16064 waits programmed tON_DELAY time, turns ENOUT_ output, causing power supply ramp output voltage target value. soft-start time taken power supply ramp from zero commanded output voltage should entered into MAX16064 with tON_RISE parameter. During tON_RISE, MAX16064 maintains DACOUT_ high-impedance state keeping switches open. This allows voltage DACOUT_ equal that node power supply. tON_RISE delay time, internal output voltage match external voltage measured DACOUT_, then DACOUT_ switch closed. voltages either side resistor should equal, very close equal. Under these conditions, little current flows into node from DACOUT_ perturbations introduced output voltage. From this point MAX16064 adjusts voltage DACOUT_ provide accurate output-voltage control. mode, user must supply tON_DELAY tON_RISE. those parameters (the default values zero), closes prematurely causes supply voltage overshoot undershoot.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
3.3V AVDD DVDD RSVD AGND AGND1 DGND A1/SCLE A2/SDAE A3/CONTROL REFO DACOUT1 ENOUT1 RS2RS2+ SYSTEM CONTROLLER RESET SMBALERT ENOUT2 RS3RS3+ RS3C DACOUT3 ENOUT3 VOPOWER SUPPLY VIN+ VINLOAD DACOUT2 RS2C VOPOWER SUPPLY VIN+ VINLOAD REFIN RS1RS1+ RS1C VOPOWER SUPPLY VIN+ VINLOAD DACOUT0 ENOUT0 REFIN POWER SUPPLY MAX16064 RS0RS0+ RS0C VOVIN+ VINLOAD
REFIN
REFIN
Figure Typical System Application-REFIN Mode
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
tPMB_RSP tON_DELAY tON_RISE tPMB_RSP tOFF_DELAY tON_FALL
PMBus
OPERATION
IDLE
OPERATION
IDLE
ENOUT_
CLOSE OUTPUT
POWER-SUPPLY VOUT
POWER-SUPPLY OPERATION
TURN-ON
TURN-OFF
Figure REFIN Mode Timing
After receiving OPERATION command turn-off signal from A3/CONTROL, MAX16064 waits programmed OFF_DELAY time, deasserts ENOUT_ output, turns power supply. mode, following formula calculate value RFB: VDAC
with upper voltage divider resistor 10k, calculated follows: (0.6V 0.03V) 0.1V
This value allows MAX16064 margin power-supply output voltage 10%. useful check margin condition using formula: VDAC (2.0V 0.6V) 0.245V
Where upper feedback divider resistor, required change output voltage, VDAC DACOUT output-voltage change that user allows. recommended operating range DACOUT_ voltage power-supply output voltage adjustment between 30mV Note that VDAC difference between steady-state power-supply node voltage, VFB, voltage limits DACOUT_. This best illustrated with example follows: Consider application involving power supply with 0.6V. desired margining ±10% power-supply output voltage power supply
effective margining range resistor therefore turns between +10% -24.5%. Note that VOUT_TRANSITION_RATE parameter effect mode. transition time margining mode operation function update rate (fAVOC), MFR_DAC_ACT_CNT (E0h) section calculation fAVOC. given following formula: 2000 fAVOC
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
3.3V AVDD DVDD RSVD AGND AGND1 DGND A1/SCLE A2/SDAE ENOUT0 RS1RS1+ A3/CONTROL REFO DACOUT1 RS1C VOPOWER SUPPLY VIN+ VINLOAD DACOUT0 MAX16064 RS0RS0+ RS0C VOPOWER SUPPLY VIN+ VINLOAD
ENOUT1 RS2RS2+ SYSTEM CONTROLLER RESET SMBALERT ENOUT2 RS3RS3+ RS3C DACOUT2 RS2C
LOAD VOPOWER SUPPLY VIN+ VIN-
LOAD VOPOWER SUPPLY VIN+ VIN-
DACOUT3
ENOUT3
Figure Typical System Application-Feedback Mode
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
tPMB_RSP tON_DELAY OPERATION tON_RISE OPERATION tPMB_RSP tOFF_DELAY tOFF_FALL
PMBus
IDLE
IDLE
ENOUT_ CLOSE OPEN
OUTPUT
HIGH-Z tPS_RISE tPS_FALL
HIGH-Z
POWER-SUPPLY VOUT
POWER-SUPPLY OPERATION
TURN-ON
TURN-OFF
MODE, tPS_RISE tPS_FALL CONTROLLED MAX16064 DEPENDENT POWER-SUPPLY IMPLEMENTATION.
Figure Feedback Mode Timing
Temperature Sensing
obtain useful temperature readings, place MAX16064 close proximity power supplies. on-chip temperature sensor MAX16064 senses temperature die, which related exposed temperature MAX16064 junction-to-case thermal resistance. exposed MAX16064 connect heat dissipating ground plane power supplies, power supplies' boards characterized obtain relationship between power supplies' temperature temperature measured MAX16064. This information used overtemperature fault settings MAX16064.
Conversion, Monitoring, AVOC Adjustment Rates
Several timing parameters control rate which MAX16064 monitors voltages temperatures rate which MAX16064 adjusts power-supply output voltages. Each four voltage input channels
single temperature channel conversions performed round-robin fashion. input filter turned setting register MFR_MODE[1] then four conversions performed each channel instead just one. small programmable delay inserted between each conversion, determined MFR_VLTO register. This establishes total conversion rate voltages temperature. Smaller values MFR_VLTO results higher sampling rate, larger values MFR_VLTO allow more settling time. conversion result registers compared fault threshold registers rate that independent total conversion rate. value register MFR_SAMPLE_RATE determines frequently this comparison occurs. Using higher fault comparison rates increases glitch sensitivity, slows response time MAX16064 PMBus commands. Using lower fault comparison rates makes MAX16064 less sensitive power-supply output voltage glitches.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
Finally, AVOC system uses separate control loop rate that related total conversion rate. value register MFR_DAC_ACT_CNT sets number total conversion cycles (one cycle complete conversions voltages temperature) that must occur before AVOC changes output voltage. Smaller values MFR_DAC_ACT_CNT shorten adjustment time. Larger values MFR_DAC_ACT_CNT adjust output voltage much slower rates, reducing possible negative effects power-supply control loop. address (MFR_SET_ADDRESS) value other than 0x00, this overrides slave address information previously address A3:A1 pins. Table shows contents addresses configuration information expected MAX16064. This information reference only. recommended properly configured, working MAX16064 save state EEPROM limit direct modifications fields possible (such slave address). Temperature voltage values stored internal representation, which same format used corresponding PMBus commands. details EEPROM internal representation, Conversion Rules (Table 1a). example, store EEPROM PAGE VOUT_COMMAND 3.0V, 19995, First calculate PMBUS command value, which 5998. voltage range conversion required. Hence write address address voltage range 5.5V, stored EEPROM value 5998/2.75 2181. write address write address Note that conversion automatically handled MAX16064 when stores loads configuration information.
MAX16064
External EEPROM Interface
MAX16064 communicate with EEPROM attached A1/SCLE A2/SDAE. MAX16064 communicates EEPROM with address byte 1010 0000 writing 1010 0001 reading. data values bytes, most significant byte stored lower address EEPROM, whereas least significant byte stored higher address EEPROM. Upon reset, MAX16064 tests presence configuration EEPROM. searches SIGNATURE bytes attached EEPROM. SIGNATURE bytes present, concludes that valid configuration EEPROM starts reading configuration information from attached EEPROM. slave
Table Conversion Rules
READ (INTERNAL PMBus) TEMPERATURE VOLTAGE Subtract 3010 (decimal) from PMBus value conversion mode; multiply 2.75 5.5V mode WRITE (PMBus INTERNAL) 3010 (decimal) PMBus value conversion mode; divide 2.75 5.5V mode
Table 16-Bit Words Stored EEPROM
EEPROM ADDRESS NAME MFR_FAULT_REASON MFR_MODE TEMPERATURE_PEAK MFR_FAULT_TEMP MFR_VOUT_PEAK MFR_VOUT_PEAK MFR_VOUT_PEAK MFR_VOUT_PEAK PAGE 0D4h Internal representation (voltage) PMBus COMMAND 0E2h 0D1h 0D6h 0E4h Must also match MFR_TICK_RELOAD Internal representation (temperature) Internal representation (temperature) NOTES
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Table 16-Bit Words Stored EEPROM (continued)
EEPROM ADDRESS 76-87 NAME MFR_FAULT_VOUT MFR_FAULT_VOUT MFR_FAULT_VOUT MFR_FAULT_VOUT VOUT_COMMAND VOUT_COMMAND VOUT_COMMAND VOUT_COMMAND TON_RISE TON_RISE TON_RISE TON_RISE TON_DELAY TON_DELAY TON_DELAY TON_DELAY VOUT_MARGIN_HIGH VOUT_MARGIN_HIGH VOUT_MARGIN_HIGH VOUT_MARGIN_HIGH VOUT_MARGIN_LOW VOUT_MARGIN_LOW VOUT_MARGIN_LOW VOUT_MARGIN_LOW TOFF_FALL TOFF_FALL TOFF_FALL TOFF_FALL OT_FAULT_LIMIT MFR_SAMPLE_RATE Reserved (set MFR_FAULT_RESPONSE MFR_FAULT_RESPONSE MFR_FAULT_RESPONSE MFR_FAULT_RESPONSE MFR_FAULT_RETRY MFR_FAULT_RETRY MFR_FAULT_RETRY MFR_FAULT_RETRY PAGE 0DAh 0D9h 0D3h Internal representation Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) 0E3h Internal representation (voltage) PMBus COMMAND NOTES
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Table 16-Bit Words Stored EEPROM (continued)
EEPROM ADDRESS 104-115 160-175 184-199 MFR_DATE MFR_STATUS_WORD WRITE_PROTECT ON_OFF_CONFIG ON_OFF_CONFIG ON_OFF_CONFIG ON_OFF_CONFIG VOUT_SCALE_LOOP VOUT_SCALE_LOOP VOUT_SCALE_LOOP VOUT_SCALE_LOOP OT_WARN_LIMIT Reserved (set MFR_SET_ADDRESS Reserved (set TOFF_DELAY TOFF_DELAY TOFF_DELAY TOFF_DELAY VOUT_TRANSITION_RATE VOUT_TRANSITION_RATE VOUT_TRANSITION_RATE VOUT_TRANSITION_RATE Reserved (set MFR_MODE_OUTPUT MFR_MODE_OUTPUT MFR_MODE_OUTPUT MFR_MODE_OUTPUT Reserved (set MFR_RESET_DELAY MFR_RESET_OUTPUT Reserved (set MFR_TICK_RELOAD MFR_STATUS_WORD MFR_STATUS_WORD MFR_STATUS_WORD MFR_STATUS_WORD NAME PAGE 0D8h 0DDh 0E1h 0D1h 0DEh 0DBh Internal representation (temperature) byte: address, high byte: reserved PMBus COMMAND 0D8h NOTES
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Table 16-Bit Words Stored EEPROM (continued)
EEPROM ADDRESS 216-237 238-255 256-297 330-509 MFR_SERIAL MFR_USERDATA_00 VOUT_OV_FAULT_LIMIT VOUT_UV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_OV_FAULT_LIMIT VOUT_UV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_OV_FAULT_LIMIT VOUT_UV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_OV_FAULT_LIMIT VOUT_UV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT Unused (set SIGNATURE (set 4432h) NAME MFR_LOCATION PAGE PMBus COMMAND 0B0h Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) Internal representation (voltage) NOTES
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
Figure shows MAX16064 interfaces external serial EEPROM using A1/SCLE A2/SDAE applications where master controller does exist required. Using GUI, user select each MAX16064 device configure required output-voltage settings sequencing/tracking information. Once configuration complete, results saved external EEPROM using STORE_DEFAULT_ALL command configuration restored MAX16064 power-on reset. EEPROM also preprogrammed prior board assembly manufacturing environment. A3/CONTROL used control signal turn on/off power supply similar fashion OPERATION command. serial EEPROM with minimum storage ensure proper device operation. PMBus system controller monitor power-supply health issuing various inquiries status commands MAX16064.
MAX16064
RESET Output Operation
RESET active-low, open-drain output that when device powering RESET assigned power supplies using MFR_RESET_OUTPUT command. When that power-supply output target voltage, RESET goes high after reset timeout period (see Figure reset timeout period (tRP) MFR_RESET_DELAY command. MFR_RESET_OUTPUT value defines which powersupply output affects RESET. MFR_RESET_OUTPUT then RESET goes high after that output reached target value. MFR_RESET_OUTPUT other value, RESET permanently low. power-supply output selected MFR_RESET_OUTPUT later disabled reason (either fault condition, OPERATION command), then RESET goes immediately. enable faults power supply cause RESET low, MFR_MODE_OUTPUT.GLOBALFAULTS supplies. RESET requires external pullup resistor.
MAX16064 Operation
power-up reset, MAX16064 goes through initialization process shown Figure After initialization, MAX16064 monitors PMBus executes PMBus commands accordingly. addition, power supply been commanded turn MAX16064 also monitors power-supply output voltage temperature MFR_SAMPLE_RATE.
3.3V
DVDD EEPROM 24LCXX RSVD DGND MAX16064
AVDD AGND
A1/SCLE A2/SDAE
RS_RS_+ RS_C
LOAD
A3/CONTROL SYSTEM CONTROLLER RESET SMBALERT DACOUT_ ENOUT_ REFIN REFO POWER SUPPLY VOVIN+ VIN-
Figure Typical System Application with External EEPROM
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
RESET
INITIALIZE INTERNAL REGISTERS
PMBus ADDRESS ACCORDING A3:A1
VALID EEPROM? RESTORE CONFIGURATION FROM EEPROM
asserts signal PMBus master voltage temperature fault occurred. Typically, SMBALERT connected other SMBALERT opendrain signals system, creating wired-OR function with SMBALERT outputs. When master interrupted SMBALERT input, stops finishes current transfer places alert response address (ARA) bus. slave that pulled SMBALERT signal acknowledges places address bus, identifying itself master slave that caused interrupt. SMBALERT deasserts when MAX16064 responds ARA. SMBALERT deasserts when fault conditions removed. SMBALERT also cleared CLEAR_FAULTS command.
ENOUT_ Operation
When power applied, ENOUT_ held low. Upon receiving command turn power supply, ENOUT_ goes high. polarity changed ENOUT_POL MFR_MODE_OUTPUT command. Setting makes ENOUT_ active low. external EEPROM upon power-up, ENOUT_ held until copied from EEPROM on-chip register which time ENOUT_ goes high. Upon receiving command turn power supply, ENOUT_ goes low. takes 1.60ms (typ) copy configuration bits from EEPROM on-chip registers.
INTERNAL REFERENCE STABLE?
ASSERT SMBALERT
Table ENOUT_ Active State
ENOUT_ DEFAULT STARTUP STATE
ENABLE PMBus COMMUNICATION
MFR_MODE_OUTPUT. ENOUT_POL
ENOUT_ ACTIVE STATE Active high Active
PMBus COMMAND?
Operation
MAX16064 includes enable input (EN) that controls ENOUT_ signals conjunction with MFR_MODE command. Unless MFR_MODE.IGNORE_EN set, below-threshold level prevents ENOUT_ from turning Additionally, voltage falls below 1.2V (typ) threshold during OPERATION MAX16064 follows fault action MFR_FAULT_RESPONSE.EN. Figure shows typical sequencing with MFR_MODE.IGNORE_EN
EXECUTE PMBus COMMAND
Figure MAX16064 Initialization
SMBALERT Output Operation
SMBALERT optional interrupt signal defined Appendix SMBus specification. MAX16064 provides output SMBALERT this interrupt signal. SMBALERT active-low, open-drain output
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
RESET ENOUT3 ENOUT2 ENOUT1 ENOUT0
tON0
tOFF0
tON1
tOFF1
tON2
tOFF2
tON3
tOFF3
NOTE: MFR_RESET_OUTPUT
Figure MAX16064 Typical Sequencing Timing
MAX16064 Address Assignment
MAX16064 picks slave address ways described below: Hardwired A3:A2:A1. Restored from EEPROM power-on.
Address assignment order shown Figure MAX16064 reads A3:A2:A1 address pins upon device reset determines address according Table
Table MAX16064 A3:A1 Slave Address Assignment
A3/CONTROL A2/SDAE A1/SCLE ADDRESS (BITS 7-1) 01h*
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Table MAX16064 A3:A1 Slave Address Assignment (continued)
A3/CONTROL A2/SDAE A1/SCLE ADDRESS (BITS 7-1)
*The shaded addresses available external EEPROM attached.
hardwired address pins give address options. example, configure MAX16064 have slave address 0101 (25h), A3:A2:A1 H:L:Z. MAX16064 also responds broadcast address (00h). EEPROM with valid SIGNATURE bytes attached MAX16064, MAX16064 tries restore slave address from EEPROM. This overrides address address pins. This gives total possible slave addresses. Note that there reserved addresses that restricted PMBus specification used PMBus systems. address from EEPROM this invalid address MAX16064 continues using address address pins. When EEPROM attached A2/SDAE A1/SCLE, these pins assume either logic-high logic-low level, therefore, resulting number possible addresses A3:A2:A1 pins this scenario addition, MAX16064 with EEPROM attached, system controller change MAX16064 slave address sending address with MFR_SET_ADDRESS command. However, address immediately effective. address must stored EEPROM first using STORE_DEFAULT_ALL command. Then,
MAX16064 power must cycled start address assignment procedure recalls address from EEPROM.
A3/CONTROL Operation
A3/CONTROL input utilized combination with inputs PMBus address when power applied device. After PMBus address detection, A3/CONTROL input functions PMBus CONTROL input. ON_OFF_CONFIG command determines whether A3/CONTROL input affects on/off behavior power supply. When A3/CONTROL enabled ON_OFF_CONFIG command, transition A3/CONTROL from high turns power supply MAX16064 received OPERATION command. transition A3/CONTROL from high initiates soft-off power supply, MAX16064 received OPERATION command (soft-off, with sequencing). MAX16064 still responds PMBus OPERATION command while A3/CONTROL enabled. detect A3/CONTROL input, A3/CONTROL signal pulse width satisfy tA3_LOW tA3_HIGH requirements detected. ON_OFF_CONFIG (02h) section Table more information.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
SLAVE ADDRESS ACCORDING A3:A1
POWER
POWER
VALID EEPROM BIT7 STORED ADDRESS EEPROM
RESTORE SLAVE ADDRESS FROM EEPROM
MFR_SET_ADDR?
SLAVE ADDRESS UNCHANGED. STORE ADDRESS TEMPORARILY.
SAVE EEPROM?
SAVE ADDRESS EEPROM
Figure MAX16064 Address Assignment
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
dual functionality A3/CONTROL MAX16064 requires that system enable signal isolated from until address setting been read latched MAX16064. Figure shows implementation three possible states A3/CONTROL setting. each case, system enable signal (MAX16064_EN) applied input three-state buffer whose output kept highimpedance state control input signal (HIZ_EN) time period during which MAX16064 reads latches A3/CONTROL address setting. After this period, control signal HIZ_EN goes allows system enable signal applied MAX16064 A3/CONTROL pin. After A3_LOW MAX16064_EN signal transitions from high causes MAX16064s commence power-supply startup operations.
3.3V
MAX16064
PMBus Digital Interface
From software perspective, MAX16064 appears PMBus device capable executing subset PMBus commands. PMBus 1.0-compliant device uses SMBus version transport protocol responds SMBus slave address. this data sheet, term SMBus used refer electrical characteristics PMBus communication using SMBus physical layer. term PMBus used refer PMBus command protocol. MAX16064 employs five standard SMBus protocols (Write Word, Read Word, Write Byte, Read Byte, Send Byte (see Figures 12-15)) program output voltage warning/faults thresholds, read monitored data, provide access manufacturer-specific commands.
MAX16064_EN MAX16064 REFO HIZ_EN tRST_WAIT MAX16064_UVLO AVDD
HIZ_EN
REFO
MAX16064 REFO
MAX16064_EN
A3/CONTROL
tA3_LOW
HIZ_EN PLACES OUTPUTS HIGH-IMPEDANCE STATE WHEN ASSERTED. MAX16064 REFO NECESSARY EEPROM ATTACHED A1/SCLE A2/SDAE. A1/SCLE, A2/SDAE EITHER PULLED PULLED DOWN WITH WHEN CONNECTED EEPROM.
Figure Application Diagram with A3/CONTROL Both Address On/Off Control Signal
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
MAX16064 supports group command. group command used send commands more than PMBus device. required that devices receive same command. However, more than command sent device group command packet. group command must used with commands that require receiving devices respond with data, such STATUS_BYTE command. When MAX16064 receives command through this protocol, immediately begins execution received command after detecting STOP condition. MAX16064 supports PAGE command uses select which individual channel access. When data word transmitted, lower order byte sent first higher order byte sent last. Within byte, most significant (MSB) sent first least significant (LSB) sent last. MAX16064 SMBus interface supports Packet Error Checking (PEC). MFR_MODE (D1h) section.
MAX16064
WRITE BYTE FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SELECTS WHICH COMMAND PARAMETER WRITE DATA BITS DATA BYTE: DATA COMMAND COMMAND BYTE
READ BYTE FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SELECTS FROM WHICH COMMAND PARAMETER READ ADDR BITS SLAVE ADDRESS: REPEATED CHANGE DATA-FLOW DIRECTION DATA BITS DATA BYTE: DATA COMMAND COMMAND BYTE
WRITE WORD FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SELECTS WHICH COMMAND PARAMETER WRITE DATA0 BITS DATA1 BITS
DATA BYTE: DATA COMMAND COMMAND BYTE
READ WORD FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SELECTS FROM WHICH COMMAND PARAMETER READ ADDR BITS SLAVE ADDRESS: REPEATED CHANGE DATA-FLOW DIRECTION DATA0 BITS DATA1 BITS
DATA BYTE: DATA COMMAND COMMAND BYTE
SEND BYTE FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SEND COMMAND WITH DATA START CONDITION REPEATED START CONDITION STOP CONDITION SLAVE TRANSMISSION
Figure SMBus Protocols
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
ADDR1 BITS SLAVE ADDRESS DEVICE CMD1 BITS COMMAND BYTE DEVICE DATA0 BITS DATA BYTES DEVICE DATA1 BITS
ADDR2 BITS SLAVE ADDRESS DEVICE
CMD2 BITS COMMAND BYTE DEVICE
DATA BITS
DATA BYTES DEVICE
ADDR3 BITS SLAVE ADDRESS DEVICE
CMD3 BITS COMMAND BYTE DEVICE
DATA0 BITS
DATA1 BITS
DATA BYTES DEVICE
ADDRn BITS SLAVE ADDRESS DEVICE
CMDn BITS
COMMAND BYTE DEVICE DATA BYTE
START CONDITION REPEATED START CONDITION STOP CONDITION SLAVE TRANSMISSION
Figure SMBus Group Command Protocol
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
WRITE BYTE FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SELECTS WHICH COMMAND PARAMETER WRITE DATA BITS DATA BYTE: DATA COMMAND COMMAND BYTE BITS
READ BYTE FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SELECTS FROM WHICH COMMAND PARAMETER READ ADDR BITS SLAVE ADDRESS: REPEATED CHANGE DATAFLOW DIRECTION DATA BITS DATA BYTES: DATA COMMAND COMMAND BYTE BITS
WRITE WORD FORMAT ADDR BITS COMMAND BITS COMMAND BYTE: SELECTS WHICH COMMAND PARAMETER WRITE READ WORD FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SELECTS FROM WHICH COMMAND PARAMETER READ ADDR BITS SLAVE ADDRESS: REPEATED CHANGE DATAFLOW DIRECTION DATA0 BITS DATA1 BITS BITS DATA0 BITS DATA1 BITS BITS
DATA BYTES: DATA COMMAND COMMAND BYTE
DATA BYTES: DATA COMMAND COMMAND BYTE
SEND BYTE FORMAT ADDR BITS SLAVE ADDRESS COMMAND BITS COMMAND BYTE: SEND COMMAND WITH DATA BITS START CONDITION REPEATED START CONDITION STOP CONDITION SLAVE TRANSMISSION
Figure SMBus Protocols with
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
ADDR1 BITS SLAVE ADDRESS DEVICE CMD1 BITS COMMAND BYTE DEVICE DATA0 BITS DATA BYTES DEVICE DATA1 BITS PEC1 BITS
ADDR2 BITS
CMD2 BITS COMMAND BYTE DEVICE
DATA0 BITS
DATA1 BITS
PEC2 BITS
SLAVE ADDRESS DEVICE
DATA BYTES DEVICE
ADDR3 BITS
CMD3 BITS COMMAND BYTE DEVICE
DATA0 BITS
DATA1 BITS
PEC3 BITS
SLAVE ADDRESS DEVICE
DATA BYTES DEVICE
ADDRn BITS
CMDn BITS
PECn BITS
SLAVE ADDRESS DEVICE
COMMAND BYTE DEVICE DATA BYTE
START CONDITION REPEATED START CONDITION STOP CONDITION SLAVE TRANSMISSION
Figure SMBus Group Command Protocol with
tLOW
tHIGH
tSU;STA tHD;STA tSU;DAT tHD;DAT ACKNOWLEDGE CLOCKED INTO MASTER DATA CLOCKED INTO MASTER DATA CLOCKED INTO MASTER MASTER PULLS LINE tSU;STO tBUF ACKNOWLEDGE CLOCKED INTO SLAVE ACKNOWLEDGE CLEAR PULSE STOP CONDITION START CONDITION
START CONDITION ADDRESS CLOCKED INTO SLAVE ADDRESS CLOCKED INTO SLAVE CLOCKED INTO SLAVE SLAVE PULLS LINE
Figure SMBus Write Timing Diagram
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
tLOW tHIGH
tSU;STA tHD;STA tSU;DAT tHD;DAT ACKNOWLEDGE CLOCKED INTO MASTER DATA CLOCKED INTO SLAVE DATA CLOCKED INTO SLAVE SLAVE PULLS LINE tSU;STO tBUF ACKNOWLEDGE CLOCKED INTO MASTER ACKNOWLEDGE CLOCK PULSE STOP CONDITION, DATA EXECUTED SLAVE START CONDITION
START CONDITION ADDRESS CLOCKED INTO SLAVE ADDRESS CLOCKED INTO SLAVE CLOCKED INTO SLAVE SLAVE PULLS LINE
Figure SMBus Read Timing Diagram
PMBus Protocol Support
MAX16064 supports subset commands defined Power System Management Protocol Specification Part Command Language Revision 1.0. detailed specifications complete list PMBus commands, refer Part PMBus specification available www.PMBus.org. supported PMBus commands corresponding MAX16064 behavior described this document. data values represented DIRECT format, unless otherwise stated. Whenever resolution data less than number bits required, data right justified (only lower bits significant) higher order bits zero-padded, unless otherwise stated. example, 2-byte value where MAX16064 only 12-bit data return, MAX16064 returns data lower bits zeropads upper bits. Whenever PMBus specification refers PMBus device, referring MAX16064 operating conjunction with power supply. While command call turning PMBus device, MAX16064 always remains continue communicating with PMBus master MAX16064 transfers command power supply accordingly.
Interpreting Received DIRECT Format Values
host system uses following equation convert value received from PMBus device, this case MAX16064, into reading volts, degrees Celsius, other units appropriate: 10-R
where calculated, real world value appropriate units etc.); slope coefficient, 2-byte, two's complement integer; 2-byte, two's complement integer received from PMBus device; offset, 2-byte, two's complement integer; exponent, 1-byte, two's complement integer.
Sending DIRECT Format Value
send value, host must equation below solve where: 2-byte, two's complement integer sent unit; slope coefficient, 2-byte, two's complement integer; real world value, units such volts, converted transmission; offset, 2-byte, two's complement integer; exponent, decimal value equivalent byte, two's complement integer.
Data Format
Voltage data commanding reading output voltage related parameters (such overvoltage threshold) presented DIRECT format. DIRECT format data 2-byte, two's complement binary value. DIRECT format data used with command that sends reads parametric value. DIRECT format uses equation defined coefficients calculate desired values. coefficients used MAX16064 found Table
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Table MAX16064 PMBus Command Summary (Global commands shaded; they dependent PAGE)
COMMAND CODE COMMAND NAME TRANSACTION TYPE Byte Byte Byte Send Byte Byte Send Byte Send Byte Read Byte Read Byte Word Word Word Word Word Word Word Word Word Word Word Word Word Word Word Read Byte Word Read Byte Read Byte Read Byte Read Byte Read Word Read Word Read Byte Block Read Block Read Block Read Block Block Block Block PAGE BYTES
PMBus STANDARD COMMANDS PAGE OPERATION ON_OFF_CONFIG CLEAR_FAULTS WRITE_PROTECT STORE_DEFAULT_ALL RESTORE_DEFAULT_ALL CAPABILITY VOUT_MODE VOUT_COMMAND VOUT_MARGIN_HIGH VOUT_MARGIN_LOW VOUT_TRANSITION_RATE VOUT_SCALE_LOOP VOUT_OV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_UV_FAULT_LIMIT OT_FAULT_LIMIT OT_WARN_LIMIT TON_DELAY TON_RISE TOFF_DELAY TOFF_FALL STATUS_BYTE STATUS_WORD STATUS_VOUT STATUS_TEMPERATURE STATUS_CML STATUS_MFR_SPECIFIC READ_VOUT READ_TEMPERATURE_1 PMBUS_REVISION MFR_ID MFR_MODEL MFR_REVISION MFR_LOCATION MFR_DATE MFR_SERIAL MFR_USER_DATA_00 19995 19995 19995 19995 19995 19995 19995 -7612 -7612 19995 -7612
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Table MAX16064 PMBus Command Summary (continued) (Global commands shaded; they dependent PAGE)
COMMAND CODE COMMAND NAME TRANSACTION TYPE Word Word Word Read Word Read Word Word Word Word Byte Word Word Byte Byte Byte Word Word Word PAGE BYTES
MANUFACTURER-SPECIFIC COMMANDS MFR_SMB_LOOPBACK MFR_MODE MFR_SAMPLE_RATE MFR_VOUT_PEAK MFR_TEMPERATURE_PEAK MFR_STATUS_WORD MFR_FAULT_RESPONSE MFR_FAULT_RETRY MFR_SET_ADDRESS MFR_RESET_DELAY MFR_MODE_OUTPUT MFR_VLTO MFR_DAC_ACT_CNT MFR_RESET_OUTPUT MFR_FAULT_REASON MFR_FAULT_VOUT MFR_FAULT_TEMP 19995 7612
following example demonstrates host send retrieve values from MAX16064. From Table coefficients used following parameters are: VOUT_COMMAND: 19995, READ_VOUT: 19995, host wants command power supply output voltage 3.0V, corresponding VOUT_COMMAND value (19995 10-1 5998.5 (decimal) 176Eh (hex) Conversely, host received value 176Eh READ_VOUT command, this equivalent
Power supplies power converters generally have knowing their outputs connected ground. Within power supply, output voltages most commonly treated positive. Accordingly, output voltages output voltage-related parameters PMBus devices commanded reported positive values. system know that particular output negative that interest system. output voltage-related commands data bytes.
Fault Management Reporting
reporting faults/warnings host real-time basis, MAX16064 asserts open-drain SMBALERT sets appropriate STATUS_BYTE MFR_FAULT_STATUS registers, respectively. recognition SMBALERT assertion, host system manager expected poll determine device asserting SMBALERT. host sends SMBus Alert Response Address (0001100). MAX16064 will SMBus Alert Response Address, transmit slave address, deassert SMBALERT. system controller then
10-R
176Eh 10-(-1) 59980 19995 2.999750 19995 which within 0.0083% 3.0V.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
communicates with PMBus commands retrieve fault/warning status information from MAX16064. following status commands supported: STATUS_BYTE STATUS_WORD STATUS_VOUT STATUS_TEMPERATURE STATUS_CML STATUS_MFR_SPECIFIC MFR_STATUS_WORD MFR_FAULT_REASON MFR_FAULT_VOUT MFR_FAULT_TEMP individual command sections more details. Faults/warnings cleared when following conditions occurs: CLEAR_FAULTS command received. OPERATION commands received that turn power supplies A3/CONTROL toggled turn then turn power supplies. Bias power (AVDD, DVDD) MAX16064 removed then reapplied. MAX16064 responds fault conditions according Manufacturer Fault Response command (MFR_FAULT_RESPONSE). This command byte determines MAX16064 should respond each particular fault. addition, MAX16064 responds following error conditions. internal reference fails operate, SMBALERT asserted. clear this fault, MAX16064 must through device reset. MAX16064 responds unsupported commands with NACK. When host sends insufficient data (too bytes), MAX16064 sets asserts SMBALERT. When host sends much data (too many bytes), MAX16064 sets asserts SMBALERT. When read request issued write-only command, read operation aborted warning issued.
PAGE (00h)
MAX16064 control four power supplies using PMBus (I2C) address. Send PAGE command with data select which power supply affected following commands. PAGE when desired that following commands affect four power supplies. when PAGE 255, host sends command code that global command (any command Table that shaded), MAX16064 sets CML, error flag. example would PAGE then issue OPERATION command turn power supplies time.
OPERATION (01h)
OPERATION command used turn power supply conjunction with ENOUT_ according ENOUT_ polarity select setup. OPERATION command also used cause power supply output voltage upper lower margin voltages. power supply stays commanded operating mode until subsequent OPERATION command change state A3/CONTROL enabled) instructs power supply change another state. valid OPERATION command byte values shown Table OPERATION command controls MAX16064 responds when commanded change output. When command byte 00h, MAX16064 immediately turns power supply ignores programmed turn-off delay fall time. When command byte 40h, MAX16064 powers down according programmed turn-off delay fall time. Table Fault means that output overvoltage warning output overvoltage fault detected when output margined high, MAX16064 treats this warning fault responds programmed warning limit fault response command. Similarly, output undervoltage warning output undervoltage fault detected when output margined low, MAX16064 treats this qualified warning/fault event responds programmed warning/fault limit fault response command. command value shown Table invalid command. MAX16064 receives data byte that listed Table then treat this invalid data, declares communications fault (set assert SMBALERT), responds described Fault Management Reporting section. default OPERATION value 00h.
PMBus Commands
summary PMBus commands supported MAX16064 described Table
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Table OPERATION Command Byte
COMMAND BYTE POWER SUPPLY Immediate sequencing) Soft-off (with sequencing) Margin (nominal) Margin (ignore fault) Margin (act fault) Margin high (ignore fault) Margin high (act fault) MARGIN STATE
ON_OFF_CONFIG (02h)
ON_OFF_CONFIG command configures combination CONTROL input serial commands needed turn power supply off. This indicates power supply commanded when power applied. ON_OFF_CONFIG message content described Table
CLEAR_FAULTS (03h)
CLEAR_FAULTS command used clear fault bits that have been set. This command clears bits STATUS_BYTE MFR_FAULT_STATUS registers simultaneously. also deasserts SMBALERT. CLEAR_FAULTS command does cause power supply that latched fault condition
Table ON_OFF_CONFIG Message Contents
NUMBER [7:5] Sets default operate either time power present on/off controlled A3/CONTROL input serial commands PURPOSE Reserved. Always returns 000. Power supply turns (ENOUT goes high) time power present regardless state A3/CONTROL pin. Power supply turned until commanded CONTROL OPERATION command configured bits [3:0]). Power supply ignores on/off portion OPERATION command received from serial bus. operation command must received turn power supply Depending [2], MAX16064 require A3/CONTROL input asserted power supply turned (ENOUT asserted). Power supply ignores A3/CONTROL input. On/off only controlled OPERATION command. Power supply requires A3/CONTROL input asserted turn power supply. Depending [3], MAX16064 require OPERATION command received power supply turned (ENOUT asserted). A3/CONTROL input active low. Drive turn power supply. A3/CONTROL input active high. Drive high turn power supply. configured turn delay (TOFF_DELAY) fall time (TOFF_FALL). Turn power supply quickly possible (deassert ENOUT). MEANING
Controls power supply responds commands received over serial
Configures power supply responds A3/CONTROL input
Polarity A3/CONTROL input
A3/CONTROL input action when commanding power supply turn
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
restart. status ENOUT_ under fault conditions affected this command should change only commanded through OPERATION command A3/CONTROL. fault still present after CLEAR_FAULTS command executed, fault again host also notified asserting SMBALERT. This command write-only. There data byte this command. This command write-only. There data byte this command. information EEPROM contents, External EEPROM Interface section.
RESTORE_DEFAULT_ALL (12h)
RESTORE_DEFAULT_ALL command transfers default configuration information from external EEPROM device attached A1/SCLE A2/SDAE user memory registers device. RESTORE_DEFAULT_ALL command only executed when power supply off. Otherwise, communication fault occurs (CML SMBALERT asserts. error occurs during data transfer, SMBALERT asserts STATUS_BYTE, STATUS_WORD MFR_FAULT_STATUS values restored RESTORE_DEFAULT_ALL command. This command write-only. There data byte this command. information EEPROM contents, External EEPROM Interface section.
WRITE_PROTECT (10h)
WRITE_PROTECT command used provide protection against accidental changes MAX16064 operating memory. supported commands have their parameters read, regardless WRITE_PROTECT settings. WRITE_PROTECT message content described Table
STORE_DEFAULT_ALL (11h)
STORE_DEFAULT_ALL command instructs MAX16064 transfer user memory configuration information external EEPROM device (default memory) attached A1/SCLE A2/SDAE. error occurs during transfer, SMBALERT asserts permitted STORE_DEFAULT_ALL command while power supply operating. However, MAX16064 unresponsive PMBus commands while transferring configuration. ENOUT_ maintains state.
CAPABILITY (19h)
CAPABILITY command used determine some capabilities MAX16064. CAPABILITY command read-only. message content described Table
Table WRITE_PROTECT Message Contents
DATA BYTE VALUE 1000 0000 0100 0000 0010 0000 0000 0000 MEANING Disable writes except WRITE_PROTECT command. Disable writes except WRITE_PROTECT, OPERATION, PAGE commands. Disable writes except WRITE_PROTECT, OPERATION, PAGE, ON_OFF_CONFIG, VOUT_COMMAND commands. Enable writes commands (default)
Table CAPABILITY Command Message Contents
DESRIPTION Packet error checking Maximum PMBus speed SMBALERT# Reserved MEANING Packet error checking supported. Always returns Maximum supported speed 100kHz. Device supports SMBALERT# output SMBus protocol. MAX16064 returns 0000.
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VOUT_MODE (20h)
VOUT_MODE command used report data format device. MAX16064 uses direct format voltage-related commands. value returned 40h, indicating DIRECT data format. This command read only. Table values various commands.
VOUT_TRANSITION_RATE (27h)
VOUT_TRANSITION_RATE command sets rate mV/µs which power-supply output voltage should change when power supply commanded change among margin high, margin low, margin (ON) OPERATION mode. This commanded rate change does apply when power supply commanded turn off. that case, tON_RISE tOFF_FALL apply. data bytes DIRECT format. Valid values from 128mV/µs mode) 0.004 30mV/µs (REFIN mode). default VOUT_TRANSITION_RATE value When VOUT_TRANSITION_RATE cleared VOUT_TRANSITION_RATE ignored voltage output changed even when commanded OPERATION command. When VOUT_TRANSITION_RATE 07FFFh, voltage output adjusted quickly possible. VOUT_TRANSITION_RATE parameter results outputting range value (valid range 4090) during transition, flag SMBALERT asserted issue warning. VOUT_TRANSITION_RATE command applies REFIN mode only ignored feedback mode.
MAX16064
VOUT_COMMAND (21h)
VOUT_COMMAND command loads MAX16064 with voltage which power-supply output changed when commanded turn using OPERATION command A3/CONTROL transition when enabled. Once power supply turned changing VOUT_COMMAND effect power-supply output voltage. MAX16064 only adjusts power supply VOUT_COMMAND voltage after receiving turn-on command. data bytes DIRECT format. Valid values from 2.0V when input range 2.0V, 5.5V when input range 5.5V. MFR_MODE_OUTPUT (DEh) section more information. default VOUT_COMMAND value 00h.
VOUT_MARGIN_HIGH (25h)
VOUT_MARGIN_HIGH command loads MAX16064 with voltage which power-supply output changed when OPERATION command margin high. power supply already operating margin high, changing VOUT_MARGIN_HIGH effect output voltage. MAX16064 only adjusts power supply VOUT_MARGIN_HIGH voltage after receiving margin high OPERATION command. data bytes DIRECT format. Valid values same VOUT_COMMAND. default VOUT_MARGIN_HIGH value 00h.
VOUT_SCALE_LOOP (29h)
applications where VOUT equal voltage REFIN, VOUT_SCALE_LOOP used. example, REFIN expects 0.6V input 3.3V output, VOUT_SCALE_LOOP 0.6V/3.3V 0.182. applications where power-supply output voltage greater than MAX16064 input range, output voltage power supply sensed through resistive voltagedivider, illustrated Figure resistive voltagedivider reduces scales output voltage, VOUT. PMBus commands specify actual power-supply output voltages input voltage control circuit. allow MAX16064 between commanded voltage (such 3.3V), voltage control circuit input (perhaps 3.3V divided down match reference voltage 2.0V), VOUT_SCALE_LOOP command used. VOUT SCALE LOOP
VOUT_MARGIN_LOW (26h)
VOUT_MARGIN_LOW command loads MAX16064 with voltage which power-supply output changed when OPERATION command margin low. power supply already operating margin low, changing VOUT_MARGIN_LOW effect output voltage. MAX16064 only adjusts power supply VOUT_MARGIN_LOW voltage after receiving margin OPERATION command. data bytes DIRECT format. Valid values same VOUT_COMMAND. default VOUT_MARGIN_LOW value 00h.
data bytes DIRECT format. Valid values from 1.0. Note that representation restriction, supplied value rounded multiples 1/128. Therefore, ensure optimum operation, circuit design should choose value close possible multiples 1/128 avoid rounding errors affect37
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VOUT_TRANSITION_RATE slew rate. Final accuracy VOUT assured closed-loop voltage control. This value dimensionless. default VOUT_SCALE_LOOP value 00h. VOUT_SCALE_LOOP command ignored feedback mode. which causes output voltage high warning. This value typically less than output overvoltage threshold VOUT_OV_FAULT_LIMIT. data bytes DIRECT format. Valid values same VOUT_COMMAND. default VOUT_OV_WARN_LIMIT value 00h. response VOUT_OV_WARN_LIMIT being exceeded, MAX16064: Sets OTHER STATUS_BYTE. Sets OTHER STATUS_WORD. Sets VOUT STATUS_WORD. Sets VOUT Overvoltage Warning STATUS_VOUT. Sets OV_WARN STATUS_MFR_SPECIFIC register. Sets OV_WARN MFR_STATUS_WORD register. Sets OTHER MFR_STATUS_WORD. Notifies host using SMBALERT assertion.
VOUT_OV_FAULT_LIMIT (40h)
VOUT_OV_FAULT_LIMIT command sets value output voltage measured across RS_+ RS_-, which causes output overvoltage fault. data bytes DIRECT format. Valid values same VOUT_COMMAND. default VOUT_OV_FAULT_LIMIT value 00h. response VOUT_OV_FAULT_LIMIT being exceeded, MAX16064: Sets VOUT_OV STATUS_BYTE. Sets VOUT_OV STATUS_WORD. Sets (low byte) (high byte) STATUS_WORD. Sets VOUT Overvoltage Fault STATUS_VOUT. Sets VOUT_OV MFR_STATUS_WORD register. Responds specified VOUT_OV_FAULT_ RESPONSE bits MFR_FAULT_RESPONSE register. Notifies host through SMBALERT assertion.
VOUT_UV_WARN_LIMIT (43h)
VOUT_UV_WARN_LIMIT command sets value output voltage measured across RS_+ RS_-, which causes output-voltage warning. This value typically greater than output undervoltage fault threshold VOUT_UV_FAULT_LIMIT. This warning masked until output voltage reaches programmed voltage startup, also during turn-off when power supply disabled. data bytes DIRECT format. Valid values same VOUT_COMMAND. default VOUT_UV_WARN_LIMIT value 00h. response violation VOUT_UV_WARN_LIMIT, MAX16064: Sets OTHER STATUS_BYTE. Sets OTHER STATUS_WORD. Sets VOUT STATUS_WORD. Sets VOUT Undervoltage Warning STATUS_VOUT register. Sets UV_WARN STATUS_MFR_SPECIFIC register. Sets UV_WARN MFR_STATUS_WORD register. Sets OTHER MFR_STATUS_WORD. Notifies host using SMBALERT assertion.
VOUT_OV_WARN_LIMIT (42h)
VOUT_OV_WARN_LIMIT command sets value output voltage measured across RS_+ RS_-,
RS_MAX16064
RS_+
LOAD
POWER SUPPLY
Figure VOUT_SCALE_LOOP
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VOUT_UV_FAULT_LIMIT (44h)
VOUT_UV_FAULT_LIMIT command sets value output voltage measured across RS_+ RS_-, which causes output undervoltage fault. This fault masked until output voltage reaches programmed voltage startup, also during turn-off when power supply disabled. data bytes DIRECT format. Valid values same VOUT_COMMAND. default VOUT_UV_FAULT_LIMIT value 00h. response violation VOUT_UV_FAULT_LIMIT, MAX16064: Sets OTHER STATUS_BYTE. Sets OTHER STATUS_WORD. Sets VOUT STATUS_WORD. Sets VOUT Undervoltage Fault STATUS_VOUT register. Sets UV_FAULT STATUS_MFR_SPECIFIC register. Sets UV_FAULT MFR_STATUS_WORD register. Sets OTHER MFR_STATUS_WORD. Responds specified VOUT_UV_FAULT_RESPONSE bits MFR_FAULT_RESPONSE register. Notifies host using SMBALERT assertion.
OT_WARN_LIMIT (51h)
OT_WARN_LIMIT command sets temperature, degrees Celsius, on-chip temperature sensor which overtemperature warning detected. data bytes DIRECT format. Valid values same OT_FAULT_LIMIT. default OT_WARN_LIMIT value 00h. response OT_WARN_LIMIT being exceeded, MAX16064: Sets TEMPERATURE STATUS_BYTE. Sets TEMPERATURE STATUS_WORD. Sets TEMPERATURE MFR_STATUS_WORD. Sets Overtemperature Warning STATUS_TEMPERATURE. Sets OT_WARN MFR_STATUS_WORD register. Notifies host through SMBALERT using assertion.
MAX16064
TON_DELAY (60h)
TON_DELAY sets time, milliseconds, from when start condition received valid OPERATION command through A3/CONTROL when enabled) until power-supply output voltage starts rise. During TON_DELAY, power supply disabled (ENOUT_ deasserted) until TON_DELAY expires. Also, undervoltage fault warning masked during TON_DELAY. data bytes DIRECT format. Valid values from 3276.7ms. default TON_DELAY value
OT_FAULT_LIMIT (4Fh)
OT_FAULT_LIMIT command sets temperature, degrees Celsius, on-chip temperature sensor which overtemperature fault detected. data bytes DIRECT format. Valid values from -142.5°C +395.4°C. default OT_FAULT_LIMIT value 00h. response OT_FAULT_LIMIT being exceeded, MAX16064: Sets TEMPERATURE STATUS_BYTE. Sets TEMPERATURE STATUS_WORD. Sets TEMPERATURE MFR_STATUS_WORD. Sets Overtemperature Fault STATUS_TEMPERATURE. Sets OT_FAULT MFR_STATUS_WORD register. Responds specified OT_FAULT_RESPONSE bits MFR_FAULT_RESPONSE register. Notifies host using SMBALERT assertion.
TON_RISE (61h)
TON_RISE sets time, milliseconds, from when power-supply output voltage starts rise until voltage entered regulation band. During TON_RISE, voltage temperature-related faults warnings masked off. Meanwhile, MAX16064 still responds PMBus command. TON_RISE parameter results outputting out-of-range value (valid range 4090) immediately during TON_RISE, flag SMBALERT asserts issue warning.
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feedback mode, MAX16064 leaves switch open during soft-start. waits TON_RISE time expire before adjusting output equal DACOUT_ feedback then closes switch. data bytes DIRECT format. REFIN mode, TON_RISE parameter 16-bit value valid values from 0.01ms 32.767ms. mode, TON_RISE 14-bit value valid values from 0.01ms 16.383ms (the upper bits ignored). default TON_RISE value 0.01ms. Setting value less than this minimum value defaults 0.01ms. command only used with device whose output sink enough current cause output voltage decrease controlled rate. When commanded turn immediately through OPERATION command, TOFF_FALL value ignored. When commanded turn through OPERATION soft-off command A3/CONTROL (when enabled) TOFF_FALL parameter used. TOFF_FALL parameter results outputting out-of-range value (valid range 4090) immediately during TOFF_FALL, flag SMBALERT asserts issue warning. feedback mode, this value used. MAX16064 disables ENOUT_ opens switch immediately after TOFF_DELAY. data bytes DIRECT format. Valid values from 0.01ms 32.767ms. TOFF_FALL value less than 0.1ms.
TOFF_DELAY (64h)
TOFF_DELAY sets time, milliseconds, from when STOP condition received soft-off OPERATION command through A3/CONTROL when enabled) until power supply stops transferring energy output. When commanded turn immediately through OPERATION command, TOFF_DELAY value ignored. When commanded turn through A3/CONTROL (when enabled) TOFF_DELAY parameter used. data bytes DIRECT format. Valid values from 3276.7ms. default TOFF_DELAY value
STATUS_BYTE (78h)
STATUS_BYTE command returns byte information with summary most critical faults. value indicates that fault warning event occurred indicates otherwise. Bits unsupported features shall reported STATUS_BYTE cannot restored RESTORE_DEFAULT_ALL command. STATUS_BYTE message content described Table This command read only. default STATUS_BYTE value (power supply off).
TOFF_FALL (65h)
TOFF_FALL command sets time, milliseconds, from turn-off delay time until output voltage commanded zero. Note that this
Table STATUS_BYTE Message Contents
NUMBER STATUS NAME BUSY VOUT_OV IOUT_OC VIN_UV TEMPERATURE OTHER MEANING fault declared because device busy unable respond. (The BUSY supported. This always returns This asserted ENOUT presently disabling power supply, regardless reason, including simply being enabled. output overvoltage fault occurred. output overcurrent fault occurred. (The IOUT_OC supported. This always returns input undervoltage fault occurred. (The VIN_UV supported. This always returns temperature fault warning occurred. communication, memory, logic fault occurred. fault warning listed bits [7:1] occurred. MFR_STATUS_WORD (D8h) section more information.
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STATUS_WORD (79h)
STATUS_WORD command returns bytes information with summary reason fault. byte STATUS_WORD same data STATUS_BYTE. STATUS_WORD message content described Table
STATUS_VOUT (7Ah)
STATUS_VOUT command returns byte information with contents described Table
MAX16064
Table STATUS_WORD Message Contents
BYTE NUMBER High STATUS NAME VOUT IOUT/POUT INPUT POWER_GOOD# FANS OTHER UNKNOWN BUSY VOUT_OV IOUT_OC VIN_UV TEMPERATURE OTHER MEANING output-voltage fault warning occurred. IOUT/POUT supported. This always returns INPUT supported. This always returns manufacturer-specific fault warning occurred. POWER_GOOD# supported. This always returns FANS supported. This always returns Reserved. fault type given bits [15:1] STATUS_WORD been detected. fault declared because device busy unable respond. BUSY supported. This always returns This asserted ENOUT presently disabling power supply, regardless reason, including simply being enabled. output overvoltage fault occurred. output overcurrent fault occurred. IOUT_OC supported. This always returns input undervoltage fault occurred. VIN_UV supported. This always returns temperature fault warning occurred. communication, memory, logic fault occurred. fault warning listed bits [7:1] occurred. MFR_STATUS_WORD (D8h) section more information.
Table STATUS_VOUT Message Contents
NUMBER VOUT overvoltage fault VOUT overvoltage warning VOUT undervoltage fault VOUT undervoltage warning VOUT_MAX warning This supported. This always returns TON_MAX_FAULT This supported. This always returns TOFF_MAX_WARNING This supported. This always returns VOUT tracking error This supported. This always returns MEANING
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STATUS_TEMPERATURE (7Dh)
STATUS_TEMPERATURE command returns byte information with contents described Table
STATUS_MFR_SPECIFIC (80h)
STATUS_MFR_SPECIFIC command returns byte information with summary reason fault. STATUS_MFR_SPECIFIC message content described Table
STATUS_CML (7Eh)
STATUS_CML command returns byte information with contents described Table
Table STATUS_TEMPERATURE Message Contents
NUMBER Overtemperature fault Overtemperature warning Undertemperature fault This supported. This always returns Undertemperature warning This supported. This always returns Reserved Reserved Reserved Reserved MEANING
Table STATUS_CML Message Contents
NUMBER Invalid unsupported data received Packet error check (PEC) failed Memory fault detected This supported. This always returns Processor fault detected This supported. This always returns Reserved communication fault other than ones listed this table occurred. This supported. This always returns Other memory logic fault occurred. This supported. This always returns MEANING Invalid unsupported command received
Table STATUS_MFR_SPECIFIC Message Contents
NUMBER STATUS NAME EN_FAULT OT_WARN OT_FAULT ADCERR_FAULT UV_WARN UV_FAULT OV_WARN MEANING input below threshold when OPERATION Overtemperature warning (same STATUS_TEMPERATURE Overtemperature fault (same STATUS_TEMPERATURE conversion fault occurred. This reserved always returns VOUT undervoltage warning occurred (same STATUS_VOUT VOUT undervoltage fault occurred (same STATUS_VOUT VOUT overvoltage warning occurred (same STATUS_VOUT
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READ_VOUT (8Bh)
READ_VOUT command returns actual measured (not commanded) output voltage across RS_+ RS_-. filter mode enabled, filtered value returned. data bytes DIRECT format. Valid values same VOUT_COMMAND. default READ_VOUT value 00h.
MFR_REVISION (9Bh)
MFR_REVISION command reads ASCII characters that contain MAX16064 revision number with block read command. default MFR_REVISION value (1). This command read only.
MAX16064
MFR_LOCATION (9Ch)
MFR_LOCATION command loads device with text (ISO/IEC 8859-1) characters that identify facility that manufactures power supply. maximum number characters This written external EEPROM using STORE_DEFAULT_ALL command. external EEPROM used, command returns text string MXIM.
READ_TEMPERATURE_1 (8Dh)
MAX16064 supports only temperature reading, READ_TEMPERATURE_1. MAX16064 returns actual on-chip measured temperature degrees Celsius. data bytes DIRECT format. Valid values same OT_FAULT_LIMIT. default READ_TEMPERATURE_1 value 00h.
MFR_DATE (9Dh)
MFR_DATE command loads device with text (ISO/IEC 8859-1) characters that identify date manufacture power supply. maximum number characters This written external EEPROM using STORE_DEFAULT_ALL command. external EEPROM used, command returns text string 080416.
PMBUS_REVISION (98h)
PMBUS_REVISION command returns revision PMBus specification which MAX16064 compliant. command data byte. Bits [7:5] indicate revision PMBus specification Part which MAX16064 compliant. Bits [4:0] indicate revision PMBus specification Part which MAX16064 compliant. values shown Table This command read only. PMBUS_REVISION value returned which indicates that MAX16064 compliant with Part Part 1.0.
MFR_SERIAL (9Eh)
MFR_SERIAL command loads device with text (ISO/IEC 8859-1) characters that uniquely identify power supply. maximum number characters This written external EEPROM using STORE_DEFAULT_ALL command. external EEPROM used, command returns text string 00000000.
Table PMBus Revision Data Byte Contents
BITS [7:5] PART REVISION BITS [4:0] 00000 PART REVISION
USER_DATA_00 (B0h)
USER_DATA_00 command loads device with user data. maximum number bytes This written external EEPROM using STORE_DEFAULT_ALL command. external EEPROM used, command returns bytes.
MFR_ID (99h)
MFR_ID command returns MAX16064 manufacturer's identification. default MFR_ID value (M). This command read only.
MFR_SMB_LOOPBACK (D0h)
MFR_SMB_LOOPBACK command returns data word previously received MAX16064. SMBus master writes data word MAX16064 using this command then retrieves data word. valid communication channel established master reads back same word. Note that another command sent between write MFR_SMB_LOOPBACK command read MFR_SMB_LOOPBACK command, MAX16064 returns whatever last command data word receives.
MFR_MODEL (9Ah)
MFR_MODEL command returns MAX16064 model number. default MFR_MODEL value (C). This command read only.
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MFR_MODE (D1h)
MFR_MODE command used configure MAX16064 support manufacturer specific commands. MFR_MODE command described Table default MFR_MODE value 00h.
Table MFR_MODE Definition
NAME DESCRIPTION This equivalent number external clock cycles provided CLKIO 100_S MFR_MODE[15:8] fEXT_CLK/10kHz where fEXT_CLK frequency external clock. example, when fEXT_CLK 1MHz, fEXT_CLK/10kHz 100, MFR_MODE[15:8] Valid Input Clock Time external input clock range from 100kHz (MFR_MODE[15:8] 2.5MHz (MFR_MODE[15:8] 248). Factor These bits ignored internal clock source selected time base (Clock Source Select Clock Enable allows output 1MHz reference clock CLKIO synchronizing multiple MAX16064s. Enables 1MHz output CLKIO. Reference clock output (default). state ignored MAX16064 controlled according ON_OFF_CONFIG. MAX16064 turns external power supplies when exceeds threshold. goes after power-up, MAX16064 turns power supply only MFR_FAULT_RESPONSE[5:4] configured EEPROM Lock Enable used protect external EEPROM data from being overwritten. STORE_DEFAULT_ALL command ignored. RESTORE_DEFAULT_ALL command still valid. STORE_DEFAULT_ALL command initiates store configuration operation external EEPROM attached A1/SCLE A2/SDAE (default). Correction Bypass Enable. Disables correction algorithm made voltage temperature readings. Applies correction algorithm temperature measurement, thus resulting high-accuracy readings. optimal operation, this should cleared (default). EEPROM fault locations locked. fault occurs, data written external EEPROM. EEPROM fault locations unlocked. fault occurs, data written external EEPROM. enabled commands. disabled (default). Disable filtering voltage temperature conversions. Enable filtering voltage temperature conversions (default). Clock Source Select determines MAX16064 reference clock time source. external clock must supplied CLKIO used MAX16064 reference clock. internal clock used.
15:8
Clock Enable
IGNORE_EN
EEPROM Lock Enable
Correction Bypass Enable
EEPROM Fault Lock Enable Filter Setting Clock Source Select
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MFR_SAMPLE_RATE (D3h)
MFR_SAMPLE_RATE command sets frequency (Hz) which conversion result registers (representing four voltages temperature) compared with their threshold limits. This parameter does control total sampling rate, which controlled MFR_VLTO. Also, output-voltage adjustment rate affected this parameter. Monitor Sample Frequency 10kHz/MFR_SAMPLE_RATE data bytes formatted positive integers. Valid values from 65535. this value default MFR_SAMPLE_RATE value which equivalent sample frequency 200Hz. default MFR_VOUT_PEAK value
MAX16064
MFR_TEMPERATURE_PEAK (D6h)
MFR_TEMPERATURE_PEAK command returns maximum actual on-chip measured temperature degrees Celsius. reset this value lowest value, write this command with data value 0FFFFh. other values written this command used comparison future peak updates. data bytes DIRECT format. Valid values same OT_FAULT_LIMIT. default MFR_TEMPERATURE_PEAK value 00h.
MFR_STATUS_WORD (D8h)
When warning fault condition detected, MAX16064 sets corresponding MFR_STATUS_WORD register notifies host using SMBALERT assertion. MFR_STATUS_WORD [7:0] (low byte) bits same definition state STATUS_BYTE command. This register cleared together with STATUS_BYTE register fault/warning clearing methods mentioned earlier CLEAR_FAULTS command. MFR_STATUS_WORD command value cannot restored RESTORE_DEFAULT_ALL command. This command read only.
MFR_VOUT_PEAK (D4h)
MFR_VOUT_PEAK command returns maximum actual measured (not commanded) output voltage volts across RS_+ RS_-. filter mode enabled, instead returning instantaneous value, filtered output voltage returned. reset this value write this command with data value other values written this command used comparison future peak updates. data bytes DIRECT format. Valid values same VOUT_COMMAND.
Table MFR_STATUS_WORD Definition
NUMBER STATUS NAME EN_FAULT OT_WARN OT_FAULT ADCERR_FAULT UV_WARN UV_FAULT OV_WARN BUSY VOUT_OV IOUT_OC VIN_UV TEMPERATURE OTHER MEANING input below threshold when OPERATION Overtemperature warning (Same STATUS_TEMPERATURE Overtemperature fault (Same STATUS_TEMPERATURE conversion fault occurred. This reserved always returns VOUT undervoltage warning occurred (same STATUS_VOUT VOUT undervoltage fault occurred (same STATUS_VOUT VOUT overvoltage warning occurred (same STATUS_VOUT fault declared because device busy unable respond. BUSY supported. This always returns This asserted ENOUT presently disabling power supply, regardless reason, including simply being enabled. output overvoltage fault occurred. output overcurrent fault occurred. IOUT_OC supported. This always returns input undervoltage fault occurred. VIN_UV supported. This always returns temperature fault warning occurred. communication, memory, logic fault occurred. fault warning listed bits [7:1] occurred.
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MFR_FAULT_RESPONSE (D9h)
MFR_FAULT_RESPONSE command specifies response each fault condition supported MAX16064. Each fault response bits that describe MAX16064 responds that particular fault. also used record condition under which fault occurs. STORE_PEAK function used store peak values (MFR_VOUT_PEAK MFR_TEMPERATURE_PEAK) EEPROM present) fault detection regardless status EEPROM Lock Enable bit. Setting STORE_PEAK enables store function.
MFR_FAULT_RETRY (DAh)
MFR_FAULT_RETRY command sets time between restarting power supply fault response restart power supply specified intervals. This command sets retry time delay multiples 100µs. This command value used fault responses that require delay retry. Delay Retry Time MFR_FAULT_RETRY [15:0] 100µs data bytes DIRECT format. Valid values from 3.2768s. When MFR_FAULT_RETRY 00h, MAX16064 restarts power supply next available time period. default MFR_FAULT_RETRY value 00h.
Table MFR_FAULT_RESPONSE Definition
BITS 13:8 FAULT RESPONSE NAME Save fault data EEPROM. save fault data EEPROM. Lock EEPROM further fault status writes after saving state (see 15). lock EEPROM further fault status writes. Reserved OT_FAULT_RESPONSE[1:0] EN_FAULT_RESPONSE[1:0]
Table Fault Response Options
RESPONSE[1:0] FAULT RESPONSE OPTION corresponding fault fault status register, assert SMBALERT, save fault state EEPROM enabled continue operation. corresponding fault fault status register, assert SMBALERT, shut down power supply (deassert ENOUT) restart power supply every (µs), where MFR_FAULT_RETRY register. corresponding fault fault status register, assert SMBALERT shutdown power supply. Store fault data EEPROM enabled corresponding fault fault status register, assert SMBALERT continue operation without action.
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MFR_SET_ADDRESS (DBh)
MFR_SET_ADDRESS command used change MAX16064 slave address. default MAX16064 address A3:A1 upon reset according Table After reset, slave address changed MFR_SET_ADDRESS command. MAX16064 Address Assignment section. This command data bytes. slave address contained bits [6:0] first data byte. first data byte must (MFR_RESET_DELAY) [MFR_SAMPLE_RATE (100 10-6)] example, MFR_RESET_DELAY MFR_SAMPLE_RATE then minimum reset timeout period (20) (100 -6)] 100ms. Note that resolution MFR_SAMPLE_RATE 100µs, this example 100µs 5ms. data bytes DIRECT format. Valid values from 3276.7ms. default MFR_RESET_DELAY value 0ms.
MAX16064
MFR_RESET_DELAY (DDh)
MFR_RESET_DELAY sets reset timeout, tRP, from when associated power-supply output voltage reaches regulation RESET output deasserts (see Figure reset timeout also dependent upon MFR_SAMPLE_RATE. minimum calculated follows:
MFR_MODE_OUTPUT (DEh)
MFR_MODE_OUTPUT command described Table
Table MFR_MODE_OUTPUT Definition
NAME Switch Mode Global Fault Select DESCRIPTION switch open when REFIN mode power supply turned off. switch remains closed when REFIN mode power supply turned off. Faults this output causes faults other outputs well. Faults this output only affects this output (default). Input Range Select determined full-scale range RS+/RS- voltage conversion. 5.5V. 2.0V (default). Prior sending voltage-related commands, user application must first configure desired input range. voltage-related commands specified input range convert commanded value internal register values. Changing Input Range Select while power supply recommended. This result unpredictable possible catastrophic operation since voltage-related commands continue refer input range that effect when command received. ENOUT Polarity Select ENOUT Polarity selects ENOUT active-on polarity. ENOUT_ Operation section. ENOUT asserted on-state same default startup state (low). ENOUT asserted on-state inverse default startup state (high). Feedback Mode Select selects closed-loop voltage control operation mode. Feedback mode. Refin mode (default). Writes when PAGE does affect this output. Writes when PAGE affects this output (default).
Input Range Select
Feedback Mode Select Page Control
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MFR_VLTO (DFh)
Voltage Loop Timeout command sets time between each five conversions. time (VLTO) calculated VLTO 250ns, where 16-bit data included command. range values 16.38ms. default value power-up 100, 25µs. total acquisition time (1.75µs 0.25µs MFR_VLTO)+ 1.75µs 0.25µs MFR_VLTO) (filtering (1.75µs 0.25µs MFR_VLTO)+ (1.75µs 0.25µs MFR_VLTO) (filtering off) where 1.75µs represents single conversion time MFR_VLTO value contained register. internal conversion registers updated this rate. However, voltages temperatures monitored another rate that controlled MFR_SAMPLE_RATE.
fAVOC (8.75 10-6 1.25 10-6 VLTO)
MFR_RESET_OUTPUT (E1h)
RESET active-low open-drain output that when device powering RESET assigned power supplies using MFR_RESET_OUTPUT command. When that power-supply output target voltage, RESET goes high after reset timeout period (see Figure reset timeout period MFR_RESET_DELAY command. MFR_RESET_OUTPUT value defines which powersupply output affects RESET. MFR_RESET_OUTPUT then RESET goes high MFR_RESET_DELAY after that output reached target value. MFR_RESET_OUTPUT other value, RESET permanently low. power-supply output selected MFR_RESET_OUTPUT later disabled reason (either fault condition, OPERATION command), then RESET goes low. enable faults power supply cause RESET low, MFR_MODE_OUTPUT.GLOBALFAULTS supplies.
MFR_DAC_ACT_CNT (E0h)
MFR_DAC_ACT_CNT command sets number samples taken before updating output voltage during AVOC mode. resulting adjustment rate
fAVOC (29.75 10-6 1.25 10-6 VLTO)
MFR_FAULT_REASON (E2h)
MFR_FAULT_REASON command returns results voltage threshold comparisons channels following fault condition.
where fAVOC update period, Hertz. This formula applies only when input filtering turned (MFR_MODE[1] When filter turned off, following formula applies:
Table MFR_FAULT_REASON Definition
NAME Reserved Reserved VFMIN3 VFMAX3 Reserved Reserved Reserved Voltage less than VOUT_UV_FAULT_LIMIT. Voltage greater than equal VOUT_UV_FAULT_LIMIT. Voltage greater than VOUT_OV_FAULT_LIMIT. Voltage less than equal VOUT_OV_FAULT_LIMIT. Reserved DESCRIPTION
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Table MFR_FAULT_REASON Definition (continued)
NAME Reserved VFMIN2 VFMAX2 Reserved Reserved VFMIN1 VFMAX1 Reserved Reserved VFMIN0 VFMAX0 Reserved Voltage less than VOUT_UV_FAULT_LIMIT. Voltage greater than equal VOUT_UV_FAULT_LIMIT. Voltage greater than VOUT_OV_FAULT_LIMIT. Voltage less than equal VOUT_OV_FAULT_LIMIT. Reserved Reserved Voltage less than VOUT_UV_FAULT_LIMIT. Voltage greater than equal VOUT_UV_FAULT_LIMIT. Voltage greater than VOUT_OV_FAULT_LIMIT. Voltage less than equal VOUT_OV_FAULT_LIMIT. Reserved Reserved Voltage less than VOUT_UV_FAULT_LIMIT. Voltage greater than equal VOUT_UV_FAULT_LIMIT. Voltage greater than VOUT_OV_FAULT_LIMIT. Voltage less than equal VOUT_OV_FAULT_LIMIT. DESCRIPTION
MFR_FAULT_VOUT (E3h)
MFR_FAULT_VOUT command returns VOUT time voltage fault triggered.
System designers thus urged derive optimum configuration based particular system needs.
Graphic User Interface (GUI)
MAX16064 Evaluation comes with free that eliminates need software development provides simple user-friendly method configuring large systems short time. Once configuration complete, results saved external EEPROM MAX16064 configuration power-up, loaded power-up onto MAX16064 through PMBus master controller. powerful MAX16064 feature inferred from screenshot shown Figure where programmable parameters displayed. These parameter values serve data bytes PMBus manufacturerspecific commands supported MAX16064. details using GUI, refer MAX16064 Evaluation Kit.
MFR_FAULT_TEMP (E4h)
MFR_FAULT_TEMP command returns temperature time temperature fault triggered.
Applications Information
Performance Consideration
MAX16064 viewed task scheduler where periodically goes through task list performs required tasks. While tempting monitor power supplies highest supported frequency, MFR_SAMPLE_RATE, must noted that doing takes away resources from other tasks, such communication with system controller. Since each application unique merit, impossible prescribe solution that suffices conditions.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Figure MAX16064 Graphic User Interface
Consideration
Accurate voltage measurement voltage regulation achieved following these guidelines good layout: Place decoupling filter capacitors AVDD, DVDD, REFO, RS_C close possible pins. using external EEPROM, place close MAX16064 short direct traces interconnections. Kelvin connections differential pair traces from desired remote-sense points power-supply output-voltage power plane RS_+ RS_- MAX16064 accurate powersupply output-voltage sensing.
Connect analog grounds (AGND, AGND1) digital ground (DGND) MAX16064 ground plane right Terminate other ground connections this ground plane. Connect this ground plane quiet analog ground plane power supply that reference voltage power supply unaffected switching noise. single-point (star) grounding technique connect analog ground plane power supply heat dissipating power ground plane power supply. Place MAX16064 close possible power supply best temperature measurement performance. Refer MAX16064 Evaluation sample layout.
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface
Typical Operating Circuit
MAX16064
DC-DC REFIN LOAD
LOAD
DC-DC REFIN LOAD LOAD
DACOUT1
DACOUT2
ENOUT1
ENOUT2
RS1C
RS1+
RS1-
RS2C
RS2+
RS0RS0+ RS0C
RS2-
ENOUT3
DACOUT3 RS3+ RS3-
ENOUT0 DACOUT0
RS3C
MAX16064
3.3V
A3/CONTROL DGND DVDD AGND AVDD RSVD REFO CLKIO A2/SDAE A1/SCLE AGND1
RESET SMBALERT SYSTEM CONTROLLER
3.3V
EEPROM
±0.3% Accurate, Quad, Power-Supply Controller with Active-Voltage Output Control PMBus Interface MAX16064
Configuration
VIEW DACOUT2 DACOUT3 RSVD DVDD DGND
AVDD AGND1
RS1RS1+ RS1C REFO RS0+ RS0C RS0DACOUT0 RS2C
SMBALERT RESET A3/CONTROL A2/SDAE A1/SCLE CLKIO ENOUT3 ENOUT2 ENOUT1
MAX16064
RS2RS2+
RS3+ RS3RS3C
THIN
EXPOSED PAD.
Chip Information
PROCESS: BiCMOS
DACOUT1 AGND ENOUT0
Package Information
latest package outline information land patterns, www.maxim-ic.com/packages. PACKAGE TYPE TQFN-EP PACKAGE CODE T3666-3 DOCUMENT 21-0141
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2009 Maxim Integrated Products Maxim registered trademark Maxim Integrated Products, Inc.
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