Advanced Dual Linear Power Control Regulated Voltage provided

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Advanced Dual Linear Power Control Regulated Voltage provided

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APW7015
Advanced Dual Linear Power Control
Regulated Voltage provided
General Description
APW7015 integrates controller Dual linear controller, well monitoring protection functions into single package, which provides three controlled power outputs with over-voltage over-current protections. controller regulates reference voltage with synchronous-rectified buck converter. linear controller regulates power microprocessor core voltage Memory Voltage. Compatible 3-bit digital-to-analog converter (DAC) that adjusts output voltage from 1.3VDC 1.65VDC 0.05V steps included APW7015. precision reference voltage-mode control provide static regulation. linear controller drives external N-channel MOSFET provide adjustable voltage. APW7015 monitors output voltages, single Power Good signal issued when Voltage within setting other output levels above their under-voltage thresholds. Additional built-in over-voltage protection output uses lower MOSFET prevent output voltages above 115% setting. over-current function monitors output current using voltage drop across upper MOSFET's RDS(ON) ,eliminating need current sensing resistor.
Switching Power VTT(1.25V) Linear1 Regulator FBVDDQ(2.5V) Linear2 Regulator NVVDD(2.05V) Simple Single-Loop Control Design
Voltage-Mode Control
Excellent Output Voltage Regulation
Output: Full Temperature Linear Output: Full Temperature Fast Transient Response High-Bandwidth Error Amplifier
Full 100% Duty Ratio TTL-Compatible 3-Bit Digital-to-Analog Output Voltage Selection
0.05V Steps from 1.3VDC 1.65VDC Power-Good Output Voltage Monitor Over-Voltage Over-Current Fault Monitors Small Converter Size Constant Frequency Operation(200kHz) Programmable Oscillator from 50kHz
1MHz
Description
DRIVE2 VID2 VID1 UGATE PHASE LGATE PGND OCSET VSEN1 COMP VSEN3 DRIVE3 VAUX
Reduce External Component Count
Applications
Motherboard Power Regulation Computers
VID0 PGOOD VSEN2 FAULT
Low-Voltage Distributed Power Supplies Card Power Regulation
ANPEC reserves right make changes improve reliability manufacturability without notice, advise customers obtain latest version relevant information verify before placing orders. Copyright ANPEC Electronics Corp. Rev. Mar., 2001 www.anpec.com.tw
APW7015
Ordering Information
APW7015
Handling Code Temp. Range Package Code Package Code Temp. Range Handling Code Tube
Tape Reel
Block Diagram
VSEN3 VAUX
Power-on Reset (POR)
VSEN1
OCSET
1.10
DRIVE3
0.90
VAUX
VSEN2 DRIVE2
Absolute Maximum Ratings
Symbol TSTG Supply Voltage Input Output Voltage Operating Ambient Temperature Range Junction Temperature Range Storage Temperature Range Soldering Temperature
Copyright ANPEC Electronics Corp. Rev. Mar., 2000
0.75
200µA
PGOOD
1.26V
LINEAR UNDERVOLTAGE
1.15
INHIBIT FAULT
SOFT START FAULT LOGIC
DRIVER1
UGATE INHIBIT
PHASE
ERROR AMP1
COMP1 PWM1
GATE CONTROL SYNCH DRIVE
1.5V
OSCILLATOR
DACOUT 28µA 4.5V
LGATE PGND
CONVERTER (DAC)
FAULT
COMP
VID0 VID1 VID2
Parameter
Rating -0.3 +0.3 +150 seconds
Unit
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APW7015
Thermal Characteristics
Symbol Parameter Thermal Resistance Free SOIC SOIC (with 3in2 Copper) Value Unit °C/W
Electrical Characteristics
(Recommended operating conditions, Unless otherwise noted) Refer Block Simplified Power System Diagrams, Typical Application Schematic
APW7015 Symbol Supply Current Nominal Supply Current UGATE, LGATE, DRIVE2, DRIVE3 open Vocset=4.5V Vocset=4.5V Vocset=4.5V Vocset=4.5V 1.26 Open Open Parameter Test Conditions Min. Typ. Max.
Unit
Power-on Reset Rising Threshold Falling Threshold Rising VAUX Threshold VAUX Threshold Hysteresis Rising VOCSET Threshold Oscillator FOCS VOSC Free Running Frequency Ramp Amplitude VP-P 10.4
Bandgap Reference DAC(VID0-VID2) Input Voltage DAC(VID0-VID2) Input High Voltage DACOUT Voltage accuracy Bandgap Reference Voltage Bandgap Reference Tolerance Linear Regulators (OUT2, OUT3) Regulation (All Linears) Output Drive Current (All Liners) Gain GBWP Gain-Bandwidth Product Slew Rate COMP=10pF
-2.0 1.265 -2.5 VAUX-VDRIVE >0.6V +2.5 +2.0
V/µs
Synchronous Controller Error Amplifier
Copyright ANPEC Electronics Corp. Rev. Mar., 2000
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APW7015
Electrical Characteristics Cont.
APW7015 Symbol Parameter Test Conditions Min. Typ. Max. Controller Gate Driver IUGATE UGATE Source RUGATE ILGATE RLGATE UGATE Sink LGATE Source LGATE Sink Unit
VCC=12V, VUGATE VUGATE1-PHASE VCC=12V, VLGATE VLGATE=
Protection VSEN1 Over-Voltage (VSEN1/DACOUT) IOVP FAULT Souring Current IOCSET OCSET Current Source Soft Start Current
VSEN1 Rising VFAULT/RT=2.0V VOCSET= 4.5VDC
Power Good VSEN1 Upper Threshold (VSEN1/DACOUT) VSEN1 Under Voltage (VSEN1/DACOUT) VSEN1 Hysteresis (VSEN1 /DACOUT) VPGOOD PGOOD Voltage
VSEN1 Rising VSEN1 Rising Upper /Lower Threshold IPGOOD= -4mA
Functional Description
(Pin Provide bias supply this pin. This also provides gate bias charge MOSFETs controlled voltage this monitored Power-On Reset (POR) purposes. DRIVE2 (Pin Connect this gate external MOSFET. This provides drive NVVDD regulator's pass transistor. VID2, VID1, VID0 (Pins VID0-2 TTL-compatible input pins 3-bit DAC. logic states these three pins program internal voltage reference (DACOUT). level
Copyright ANPEC Electronics Corp. Rev. Mar., 2000
DACOUT sets converter output voltage, well corresponding PGOOD thresholds. PGOOD (Pin PGOOD open collector output used indicate status output voltages. This pulled when synchronous regulator output within ±10% DACOUT reference voltage when other outputs below their undervoltage thresholds. VSEN2 (Pin Connect this resistor divider linear regulator (NVVDD) output voltage.
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APW7015
Functional Description (Cont.)
(Pin Connect capacitor from this ground. This capacitor, along with internal 28mA current source, sets soft-start interval converter. FAULT (Pin This provides oscillator switching frequency adjustment. placing resistor (RT) from this GND, nominal 200kHz switching frequency increased according following equation: =200kHz (kW) GND) COMP (Pin COMP available external pins converter error amplifier. inverting input error amplifier. Similarly, COMP error amplifier output. These pins used compensate voltage-mode control feedback loop synchronous converter. VSEN1 (Pin This connected converter's output voltage. PGOOD comparator circuits this signal report output voltage status over- voltage protection. OCSET (Pin Connect resistor from this drain respective upper MOSFET. This resistor, internal 200µA current source, upper MOSFET's onresistance converter over-current trip point. over-current trip cycles soft-start function. voltage this monitored power-on reset (POR) purposes pulling this with open drain device will shutdown PGND (Pin This power ground connection. synchronous converter's lower MOSFET source this pin. LGATE (Pin Connect LGATE converter's lower MOSFET gate. This provides gate drive lower MOSFET. PHASE (Pin Connect this gate external MOSFET. This provides drive FBVDDQ regulator's pass transistor. VSEN3 (Pin Connect this resistor divider linear regulator (FBVDDQ) output voltage.
Copyright ANPEC Electronics Corp. Rev. Mar., 2000 www.anpec.com.tw
Conversely, connecting resistor from this reduces switching frequency according following equation: =200kHz (kW) 12V)
Nominally, voltage this 1.26V. event over-voltage over-current condition, this internally pulled VCC. VAUX (Pin This provides boost current linear regulator's output drives event bipolar transistors (instead N-channel MOSFETs) employed pass elements. voltage this monitored power-on reset purposes. (Pin Signal ground voltage levels measured with respect this pin. DRIVE3 (Pin
Connect PHASE converter's upper MOSFET source. This represents gate drive return current path used monitor voltage drop across upper MOSFET over-current protection.
APW7015
Functional Description (Cont.)
UGATE (Pin Connect UGATE converter's upper MOSFET gate. This provides gate drive upper MOSFET.
Table Output Voltage Program
Name VID2 VID1 VID0 Nominal OUT1 Voltage DACOUT 1.35 1.45 1.55 1.65
Note connected Vss, open connected through pull-high resistors.
Typical Characteristics
+5VIN +3.3VIN VOUT2 Linear Controller APW7015 VOUT3 Linear Controller PWM1 Controller VOUT1
Customer Service
Anpec Electronics Corp. Head Office Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. 886-3-5642000 886-3-5642050 Taipei Branch 137, Lane 235, Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, 886-2-89191368 886-2-89191369
Copyright ANPEC Electronics Corp. Rev. Mar., 2000
www.anpec.com.tw

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