MC33567 Dual Linear Power Supply Controller designed facilitate power
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MC33567 Dual Linear Controller High Current Voltage Regulation
MC33567 Dual Linear Power Supply Controller designed facilitate power management motherboard applications where reliable regulation high current supply planes required. provides Drive, Sense Control signals interface external, N-channel MOSFETs regulating different supply planes. Undervoltage short circuit detection places operation system into protected mode pending removal short.
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SO-8 SUFFIX CASE
Independent Regulated Supplies MC33567-1: 1.515 Supply Planes
1.818 Supply Plane Memory Termination MC33567-2: Dual 2.525 Supplies Clock Memory MC33567-3: Voltage Supply Voltage Supply Undervoltage Short Circuit Protection Supply Undervoltage Detection Drive Capability N-Channel MOSFETs Bypass Function Card Detection
M567x ALYW
Assembly Location Wafer Year Work Week
CONNECTIONS
DRV1 SENSE1 SHDN1 DRV2 SENSE2 SHDN2
Applications
Motherboards Dual Power Supplies
SHDN1 Startup Undervoltage Shutdown Control SENSE1 Vout1 DRV1
ORDERING INFORMATION
detailed ordering shipping information package dimensions section page this data sheet.
UVLO Bypass (MC33567-1 only) Control SENSE2 DRV2
SHDN2
Startup Undervoltage Shutdown
Vout2
Figure Simplified Block Diagram
Semiconductor Components Industries, LLC, 2002
November, 2002 Rev.
Publication Order Number: MC33567/D
MC33567
SHDN1 SHDN1 Comparator 0.75 VOUT1 SHDN2 SHDN2 Comparator ENABLE DRV2 SHDN1 UVLO SENSE1 Pulse Generator VOUT1 BYPASS (MC33567-1 Only) Pulse Generator SHDN2 UVLO SENSE2 UVLO VOUT1 MC33567-1: 1.818 MC33567-2: 2.525 MC33567-3: 2.300 VOUT2 1.515 2.525 1.200 0.75 VOUT2 Comparator ENABLE DRV1
Figure Functional Block Diagram ASSIGNMENTS FUNCTIONS
NAME DRV1 SENSE1 SHDN1 SHDN2 SENSE2 DRV2 high level turns regulation gate (Internal pull- Sense line. Sense load voltage provides feedback regulator. Gate drive. Saturates external bypass mode (MC33567-1 only). internally clamped ground power down mode. Supply voltage operation gate drive output typically DESCRIPTION Gate drive. internally clamped ground power down mode. Sense line. Sense load voltage provides feedback regulator. high level turns regulation gate (Internal pull-
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Comparator
VOUT2
MC33567
MAXIMUM RATINGS (Notes
Rating Supply Voltage SHUTDOWN Voltage Operating Ambient Temperature Operating Junction Temperature Lead Temperature (Soldering, seconds) Storage Temperature Range Package Thermal Resistance, Junction Ambient Thermal Resistance, Junction Case Symbol SHDN Tstg (Note Value 12.5 -5.0 Unit °C/W °C/W
Ratings Machine Model protection class Human Body Model protection 2000 class Minimum test board with wide thick copper traces1 inch long. characterizing done with MTD3055VL N-Channel MOSFETs.
ELECTRICAL CHARACTERISTICS
(VCC SHDN1 SHDN2 80°C, typical values shown 25°C unless otherwise noted.) Characteristic Supply Voltage Quiescent Current SHDN1 SHDN2 SHDN1 SHDN2 Symbol 12.5 Unit
UNDERVOLTAGE LOCKOUT
Undervoltage Lockout Threshold Voltage (VCC Increasing) Hysteresis Voltage (VCC Decreasing) UVLO UVLOVhys
DRIVE OUTPUTS
Drive Output Voltage (Gate Ground) Drive Output Source Current 25°C) Gate Drive Output Sink Current (Vsense 25°C) Vdrv Ipkdrv Isink 10.5
SHUTDOWN INPUTS
Shutdown Threshold Voltage (Drive output off, ramp SHDN Shutdown Threshold Hysteresis (Drive output Shutdown Disable Time (Drive output off, ramp SHDN Shutdown Input Current SHDN SHDNVth SHDNhys SHDNtdis SHDN 1.13
SHORT CIRCUIT
Short Circuit/Undervoltage Detect Threshold (Load current increased until output voltage drops activating hiccup mode) Drive Output Response Time short circuit (Ramp down Vsense Drive Output Time hiccup mode (Vsense Drive Output Time hiccup mode (Vsense SCuvd SCtd SCton SCtoff 0.97 47.7 %Vout
OUTPUT REGULATION
Regulator Output Voltage (Vin MC33567-1 Output Output MC33567-2 Output Output MC33567-3 Output Output Output Voltage Regulation Vout1 Vout2 Vout1 Vout2 Vout1 Vout2 Vreg% 1.773 1.477 2.462 2.462 2.243 1.170 -2.5 1.818 1.515 2.525 2.525 2.300 1.200 1.864 1.553 2.589 2.589 2.358 1.230 +2.5
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MC33567
OPERATING DESCRIPTION Introduction MC33567 series family Dual Linear Controllers designed Power Management applications where high current, voltage regulation needed. Some computer applications include: Power Supply 1.515 (Advanced Graphic Port) GTL+ (Gunning Transistor Logic Intel's electrical technology) 1.818 planes motherboards Power Supply 2.525 Clock memory MC33567 provides tight output voltage regulation, (Vout), incorporates individual SHDN controls each controller voltage protection sensing output voltage.
Output:
Listed below SHDN threshold voltage levels corresponding regulator output voltages: SHDN left open, output voltage regulated value. voltage less than applied SHDN pin, output voltage voltage greater than less than applied SHDN pin, output voltage regulated voltage. SHDN voltage pulled above MC33567 enters bypass mode. this mode, MOSFET fully enhanced output voltage MOSFET drain voltage (Vin) minus MOSFET drain-source voltage VDS(on). This feature only available REGULATOR MC33567-1. Table summarizes output voltage options relationship with VSHDN.
Table Logic Table SHDN
Device MC33567-1 REGULATOR SHDN Connect t0.8 u1.3 Connect t0.8 SHDN Vout 1.818 1.818 1.515 1.515 Vin-V DS(on)
(Bypass Mode)
MC33567 provides tight output voltage regulation from supply voltages using external N-Channel MOSFETs. Each controller operates independently regulates output voltage predetermined level (1.2 1.515 1.818 2.525 addition, regulator MC33567-1 incorporates bypass mode which external fully enhanced.
Shutdown:
REGULATOR
regulated outputs MC33567 disabled with SHDN pin. also determines output voltage level. SHDN controlled externally from board signals like GTL+ shown Figure
(Vin) Card Type Detection (VCC) Card Voltage Vout Vin*
MC33567-2 REGULATOR REGULATOR MC33567-3 REGULATOR
Connect t0.8 u1.3 Connect t0.8 u1.3 Connect t0.8
2.525 2.525
REGULATOR
Undervoltage Detection:
MC33567
DRV2 SENSE2 SHDN2
*Vin while bypass mode (MC33567-1 only)
Figure V/3.3 Card Detection
Vout drops below regulated threshold greater than short circuit condition present, that output will into short circuit Hiccup Mode. While Hiccup mode, output turned duty cycle 1:41 shown Figure This mode will continue long fault present. Once fault removed, regulator will resume normal operation.
Figure Hiccup Mode Duty Cycle
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MC33567
Sense:
load located away from regulator, voltage drop connecting cable trace become significant. MC33567 provides tight voltage load regulation with varying load currents using it's SENSE feature. shown Figure MC33567 senses voltage load provides feedback regulator. regulator voltage then adjusted compensate load changes. recommended that SENSE connection placed close possible load. Also, separate trace connect source N-channel MOSFET load avoid interference coupling with SENSE signal. SENSE feature required correct device operation. SENSE connected load, output will into Hiccup mode. current into SENSE given following equation:
ISENSE
required RDS(on) calculated using equation below:
RDS(on) Vout ILOAD
where: Input Voltage, typically Vout Regulator Output Voltage (1.2 1.515 1.818 2.525 ILOAD Load Current safety margin added account RDS(on) variations over operating temperature range.
Stability:
After evaluating regulator, driver load system using control theory demonstrated that output capacitor, external driver gain error amplifier gain bandwidth play important role system stability. insure system stability following design guidelines should followed:
Feedback Regulator SENSE VOUT ISENSE
Figure Voltage Regulation Using Sense Feature
N-Channel MOSFET Selection:
MC33567 characterized using Semiconductor's MTD3055VL N-channel MOSFET. Other MOSFETs used with MC33567 long power stability requirements met.
Power:
MOSFET with drain-source resistance (RDS(on)) will insure output voltage drastically reduced excessive voltage drop across MOSFET.
where: Driver pole frequency Input reverse transfer capacitance when device Regulator output resistance MC33567) Secondary pole open loop Error amplifier gain bandwidth Error second pole (set specified) Output capacitor Maximum driver transconductance gain Output capacitance Overall loop response time
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MC33567
output capacitor capacitance required using MTD3055VL external driver calculated follows:
10.87 (1240 10.87 3.42 MHz) mhos
SENSE RINT ISENSE
Adjustable Output Voltage:
MC33567 will regulate Vout preset voltage level, referenced sense pin. However, other Vout levels obtained scaling sense voltage. This done using resistive network between load sense shown Figure
3.42
3.42 MHz)
Vout(new) Vout
mhos 233.2
selecting have:
3.42 82.07
Figure Output Voltage Scaling Using Resistive Network
regulator will increase load voltage until SENSE voltage reaches regulator voltage level, Vout. output voltage, Vout(new), calculated follows:
Vout(new) Vout Vout ISENSE
selected industry standard value. Please note that system designed work with several drivers, system designed around driver with higher gain insure stability them. design guidelines discussed this section conservative enough that satisfactory results obtained with devices that just outside these guidelines, although deviation from these guidelines will generally cause instability. more detailed analysis linear regulators stability please refer Semiconductor application note AND8037/D.
Please note that this configuration sense internal resistor parallel. parallel combination will reduce effective resistance range RINT, parallel combination will almost half original intended value This will cause Vout(new) smaller than calculated using above equation. This avoided making small possible, probably range Ohms. Vout(new) limited external driver drain current required Gate-Source voltage well Drive Output Voltage, Vdrv. Layout Guidelines recommended that MC33567 placed physically close possible external series pass MOSFET transistors. short traces minimize extraneous signals from being induced SENSE line. Also, avoid routing SENSE line near load input current path, well return current path prevent signal coupling.
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MC33567
Power Supply SENSE1
DRV1
DRV2 SENSE2 LOAD2 SHDN2 SHDN1 LOAD1 Card
SHDN1
MC33567
SHDN2
Figure Application Block Diagram Parts List
Reference Part/Description Electrolytic Capacitor MC33567 MTD3055VL Vendor Various Semiconductor Semiconductor N-Channel MOSFET Notes
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MC33567
MC33567 TYPICAL CHARACTERISTICS
PHASE GAIN/PHASE (dB/°) PHASE MARGIN PHASE MARGIN GAIN ILOAD RESR -100 1,000 10,000 100,000 FREQUENCY (Hz) 1,000,000 GAIN/PHASE (dB/0°) PHASE PHASE MARGIN PHASE MARGIN GAIN ILOAD RESR -100 1,000 10,000 100,000 FREQUENCY (Hz) 1,000,000
Figure Gain-Phase Plot Output Capacitor with
VOUT1, REGULATOR OUTPUT VOLTAGE VOUT2, REGULATOR OUTPUT VOLTAGE 1.840 1.835 1.830 1.825 1.820 1.815 1.810 1.805 1.800 1.795 1.790 Gate Drive Open 1.540 1.535 1.530 1.525 1.520 1.515 1.510 1.505 1.500 1.495 1.490
Figure Gain-Phase Plot Output Capacitor with
Gate Drive Open
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Regulator (Suffix Output Voltage Ambient Temperature
Figure Regulator (Suffix Output Voltage Ambient Temperature
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MC33567
SCUVD, SHORT CIRCUIT/UNDERVOLTAGE DETECT THRESHOLD SCUVD, SHORT CIRCUIT/UNDERVOLTAGE DETECT THRESHOLD
1.40 Regulator 1.35 1.30 1.25 1.20 1.15 1.10 Regulator
Regulator Regulator
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Short Circuit/Undervoltage Detect Threshold (Suffix Ambient Temperature
VOUT1, REGULATOR OUTPUT VOLTAGE VOUT2, REGULATOR OUTPUT VOLTAGE
Figure Short Circuit/Undervoltage Detect Threshold (Suffix Ambient Temperature
2.320 2.315 2.310 2.305 2.300 2.295 2.290 2.285 2.280 2.275 2.270
Gate Drive Open
1.200 1.215 1.210 1.205 1.200 1.195 1.190 1.185 1.180 1.175 1.170
Gate Drive Open
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Regulator (Suffix Output Voltage Ambient Temperature
Figure Regulator (Suffix Output Voltage Ambient Temperature
ISINK, GATE DRIVE SINK CURRENT (mA)
Regulator Regulator QUIESCENT CURRENT (mA)
Quiescent Current with both SHDNs Quiescent Current with both SHDNs High
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Gate Drive Sink Current Ambient Temperature
Figure Quiescent Current Ambient Temperature
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MC33567
VHYS, UVLO HYSTERESIS VOLTAGE (mV) UVLO, UNDERVOLTAGE LOCKOUT THRESHOLD VOLTAGE Minimum Operating Threshold Startup Threshold
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Undervoltage Lockout Threshold Ambient Temperature
Figure UVLO Hysteresis Voltage Ambient Temperature
VDRV, DRIVE OUTPUT VOLTAGE
10.75 10.70 10.65 10.60 Series 10.55 10.50 10.45 10.40 VSHDN SCTOFF, DRIVE OUTPUT TIME HICCUP MODE (ms)
50.0 49.5 49.0 48.5 48.0 47.5 47.0 46.5 46.0 45.5 45.0
10.35 10.30
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Regulator Maximum Gate Voltage Ambient Temperature
Figure Drive Output Time Hiccup Mode Ambient Temperature
1.06 SCTON, DRIVE OUTPUT TIME HICCUP MODE (ms) 1.04 1.02 1.00 0.98 0.96 0.94 0.92 0.90
TA,TEMPERATURE (°C)
Figure Drive Output Time Hiccup Mode Ambient Temperature
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MC33567
ORDERING INFORMATION
Device MC33567D-1 MC33567D-1R2 MC33567D-2 MC33567D-2R2 MC33567D-3 MC33567D-3R2 *While bypass mode. Package SO-8 SO-8 SO-8 SO-8 SO-8 SO-8 Shipping Units/Rail 2500/Tape Reel Units/Rail 2500/Tape Reel Units/Rail 2500/Tape Reel
Vout1 1.818 1.818 2.525 2.525 2.300 2.300
Vout2 1.515 Vin* 1.515 Vin* 2.525 2.525 1.200 1.200
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MC33567
PACKAGE DIMENSIONS
SO-8 SUFFIX PLASTIC SOIC PACKAGE CASE 751-07 ISSUE
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSION INCLUDE MOLD PROTRUSION. MAXIMUM MOLD PROTRUSION 0.15 (0.006) SIDE. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.127 (0.005) TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. 751-01 THRU 751-06 OBSOLETE. STANDAARD 751-07 MILLIMETERS 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 0.10 0.25 0.19 0.25 0.40 1.27 0.25 0.50 5.80 6.20 INCHES 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 0.004 0.010 0.007 0.010 0.016 0.050 0.010 0.020 0.228 0.244
0.25 (0.010)
0.25 (0.010)
SEATING PLANE
0.10 (0.004)
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MC33567/D
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