MC33567 Dual Linear Power Supply Controller designed facilitate power

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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.
SO-8 SUFFIX CASE MC567x ALYW
MC33567-1: Two, Independent Regulated Supplies
1.515 Supply Planes 1.818 Supply Plane Memory Termination MC33567-2: Dual 2.525 Supplies Clock Memory Undervoltage Detection Protection Mode Drive Capability SOT-223, DPAK, D2PAK MOSFETs Bypass Function Card Detection
Assembly Location Wafer Year Work Week
Applications
CONNECTIONS
Gate1 Sense1 Shutdown1 Gate2 Sense2 Shutdown2
Motherboards Dual Power Supplies
Simplified Functional Block Diagram ORDERING INFORMATION
Bypass SHDN1 UVLO DRV1 Control SNS1 Vout1 +3.3 detailed ordering shipping information package dimensions section page this data sheet.
Startup Undervoltage Shutdown Bypass DRV2 Control SNS2 Vout2 +3.3
SHDN2 Startup Undervoltage Shutdown
Semiconductor Components Industries, LLC, 2000
November, 2000 Rev.
Publication Order Number: MC33567/D
MC33567
MAXIMUM RATINGS*
Rating Supply Voltage Operating Ambient Temperature Operating Junction Temperature Lead Temperature (Soldering, seconds) Storage Temperature Range Package Thermal Resistance, Junction Ambient Thermal Resistance, Junction Case *All characterizing done with MTD3055VL N-Channel MOSFETs. Symbol Tstg Note Value 12.5 +125 +150 Unit °C/W °C/W
Minimum test board with wide thick copper traces1 inch long.
ELECTRICAL CHARACTERISTICS
Characteristic Supply Voltage Quiescent Current Symbol 12.5 Unit
UNDER VOLTAGE LOCKOUT
Undervoltage Lockout Hysteresis UVLO Vhys
DRIVE
Drive Voltage (Gate Ground) Gate Drive Source Output Current (Pin Gate Drive Sink Current (Steady State) Vdrv Ipkdrv Isink 10.5
SHUTDOWN
Shutdown Threshold Shutdown Hysteresis Shutdown Disable Time Shutdown Current Threshold SHDN SHDNhys SHDNtdis ISHDN 1.13
SHORT CIRCUIT
Short Circuit Response Time Short Circuit Time Short Circuit Time Short Circuit/Undervoltage Detect (Load current increased until output drops) SCtd SCton SCtoff SCuvd %Vout
OUTPUT REGULATION
MC33567-1 Regulator Regulator MC33567-2 Output Voltage Regulation (Full-Load No-Load 25-70°C) Vreg1 Vreg2
-2.5
1.818 1.515 2.525
+2.5
Vreg%
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MC33567
+3.3
Vref
Vreg
Vref Vref
UVLO Vref UVLO
SNS1 SHDN1 COMP SHDN1 Vref FAULT LOGIC FAULT UVLO SHDN1 Vref FAULT BYPASS 1.818 SNS1 DRV1 Vref
DRV1 SNS1
1.818
GLITCH FILTER Vref
SNS2 SHDN2 Vref FAULT LOGIC FAULT UVLO SHDN2 Vref FAULT COMP SHDN2 BYPASS 1.515 SNS2 DRV2 Vref DRV2 1.515
SNS2
GLITCH FILTER Vref
Internal ground disables bypass function 1.818 regulator MC33567-1 2.525 regulators MC33567-2. undervoltage comparators.
Figure Functional Block Diagram
ASSIGNMENTS FUNCTIONS
NAME Gate drive Sense line Shutdown Ground Shutdown Sense line Gate drive volt input high level turns regulation gate Effectively grounds gate (Internal pull-up Returns regulated output from MOSFET. Drives MOSFET into linear region 1.515 operation. Saturates external bypass mode. internally clamped ground power down mode. Supply voltage operation gate drive output. DESCRIPTION Drives MOSFET into linear region. internally clamped ground power down mode. Returns regulated output from MOSFET. high level turns regulation gate Effectively grounds gate (Internal pull-up
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MC33567
OPERATING DESCRIPTION MC33567 Dual Linear Controller designed power management applications where high current, voltage regulation needed. Some computer applications include: 1.515 (Advanced Graphic Port) GTL+ (Gunning Transistor Logic Intel's electrical technology) 1.818 planes motherboard 2.525 Clock memory
Hiccup Mode
output drops below regulated threshold greater than short circuit condition exists, that output will into hiccup mode. This means that output turned duty cycle 1:40. Please refer Figure Each transition from high input restarts hiccup mode holdoff period. Once short circuit removed output comes back regulated threshold, will operate under normal operating conditions.
which external board wired shutdown will determine output MC33567. Listed conditions external board wired corresponding output voltages: there connection external board, there open output will regulated output voltage. there ground external board which will cause SHUTDOWN less than MOSFET turns there output voltage. there resistor external board pulling SHUTDOWN above output will bypass mode. this mode, MOSFET fully fully enhanced, output will whatever voltage supplied input voltage MOSFET, Vin. SHUTDOWN between output will regulated voltage. Tables logic tables SHUTDOWN pins. Note that logic tables same 1.515 regulator 1.818 regulator. MC33567-2 does have Full-On Bypass feature.
Table Logic Table Shutdown (Pin 1.515 Regulator
SHUTDOWN Connect t0.8 VtSHDNt4.1 u4.2 1.515 Regulator Output 1.515 Shutdown 1.515 Bypass
Figure Hiccup Mode Duty Cycle Shutdown
SHUTDOWN connected external board (AGP GTL+). Please refer Figure
Card Type Detection
Card Voltage
Table Logic Table Shutdown (Pin 1.818 Regulator
SHUTDOWN Connect t0.8 Gate Sense2 Shutoff2 1.818 Regulator Output 1.818 Shutdown 1.818
V/1.5
MC33567
TRUTH TABLE connect 1.515 drive active 0.8V shutdown (drive 1.515 drive active bypass mode (drive FET)
Figure V/3.3 Card Detection
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MC33567
Sense Layout Guidelines
SENSE pins provide tight regulation load voltages with varying load currents. When load located distance, there will voltage drop resistance loss trace. load near MC33567, recommended that SENSE pins used. Connect SENSE pins close load possible. separate trace connect source N-Channel MOSFET load. Refer Figure
recommended that MC33567 placed physically close possible external series pass MOSFET transistors. short traces minimize extraneous signals from being magnetically electrostatically induced sense drive lines. Place sense trace power trace same plane same direction. power trace placed from series pass transistor source lead load. Avoid routing sense lead near load current return path. Also avoid unterminated runs sense leads. desired have options where sense lead placed board, resistor jumpers make alternate sense lead connection near sense pin.
N-Channel MOSFET Selection
Sense
Figure Capacitor Selection
Semiconductor MTD3055VL N-Channel MOSFET used characterization MC33567. select N-Channel MOSFET drain-source on-resistance, RDS(on), must considered. best results, RDS(on) needs low. Below calculation RDS(on). equation prevent saturation account tolerance build-up.
RDS(on) Vout ILoad
Stable operation achieved preserving adequate phase margin. rule thumb preserving adequate phase margin
10*6 10*6
Where: typically Vout 1.515 1.818 2.525 ILoad Current load Select N-channel MOSFET that RDS(on) lower than calculated value.
Where: load capacitance equivalent series resistance (ESR) capacitor example, load capacitor then capacitor would need less than
10*6
This rule thumb assumes that capacitors across load same type value. different types values used parallel across load, then each individual capacitor must meet requirements given equation.
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MC33567
Power Supply DRV1 SNS1
DRV2 SNS2
SHDN1
MC33567
SNS2 SHDN2 SHDN1 SNS1 Card
SHDN2
Figure Application Block Diagram
Parts List
Reference Part/Description Electrolytic Capacitor MC33567 MTD3055VL Vendor Various Semiconductor Semiconductor N-Channel MOSFET Notes
MC33567 TYPICAL CHARACTERISTICS
PHASE PHASE MARGIN PHASE MARGIN GAIN ILOAD Resr -100 -100 FREQUENCY FREQUENCY ILOAD Resr PHASE *PHASE MARGIN PHASE MARGIN GAIN
Figure Gain-Phase Plot
Figure Gain-Phase Plot
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MC33567
1.83 1.828 Load 1.826 VOLTAGE VOLTAGE 1.824 1.822 1.82 1.818 1.816 1.814 1.812 1.81 Load 1.515 1.514 1.513 1.512 1.511 1.51 1.509 1.508 1.507 1.506 Load Load
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Regulator Load Regulation Temperature Gate Drive Open
SINK CURRENT (MA) Regulator Regulator QUIESCENT
Figure Regulator Load Regulation Temperature Gate Drive Open
Quiescent Current with both SHDNs High
Quiescent Current with Regulator SHDN High
Quiescent Current with both SHDNs
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Gate Drive Sink Current Temperature
1.817 1.816 VOLTAGE VOLTAGE 1.815 1.814 1.813 1.812 1.811 1.514 1.513 1.512 1.511 1.51 1.509 1.508
Figure SHDN Quiescent Current Temperature Load
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Regulator Line Regulation Temperature Load (3.0
Figure Regulator Line Regulation Temperature Load (3.0
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MC33567
VOLTAGE VOLTAGE
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Under Voltage Lock Threshold Temperature
10.8 10.75 10.7 VOLTAGE TIME (ms) 10.65 10.6 10.55 10.5 10.45 10.4 Series 42.5 41.5 40.5
Figure Under Voltage Hysteresis Temperature
Regulator Regulator
39.5
TA,TEMPERATURE (°C)
TA,TEMPERATURE (°C)
Figure Regulator Maximum Gate Voltage with SHDN Temperature
0.88 0.86 0.84 0.82 0.78 Regulator Regulator
Figure Hiccup Time Temperature
TIME (ms)
TA,TEMPERATURE (°C)
Figure Hiccup Time Temperature
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MC33567
ORDERING INFORMATION
Device MC33567D-1 MC33567D-1R2 MC33567D-2 MC33567D-2R2 Output Voltage (Vout1) Regulated/Bypass (Vout2) V/3.3 V/3.3 Package SO-8 SO-8 SO-8 SO-8 Shipping Units/Rail 2500 Tape Reel Units/Rail 2500 Tape Reel
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MC33567
PACKAGE DIMENSIONS
SO-8 SUFFIX PLASTIC SOIC PACKAGE CASE 751-07 ISSUE
0.25 (0.010)
0.25 (0.010)
SEATING PLANE
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. 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
0.10 (0.004)
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MC33567
Notes
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MC33567
Semiconductor trademarks Semiconductor Components Industries, (SCILLC). SCILLC reserves right make changes without further notice products herein. SCILLC makes warranty, representation guarantee regarding suitability products particular purpose, does SCILLC assume liability arising application product circuit, specifically disclaims liability, including without limitation special, consequential incidental damages. "Typical" parameters which provided SCILLC data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. SCILLC does convey license under patent rights rights others. SCILLC products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure SCILLC product could create situation where personal injury death occur. Should Buyer purchase SCILLC products such unintended unauthorized application, Buyer shall indemnify hold SCILLC officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that SCILLC negligent regarding design manufacture part. SCILLC Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
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MC33567/D

MC33567 Dual Linear Power Supply Controller designed facilitate power

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