MC33565 Drop Voltage Regulator designed computer peripheral card appli
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MC33565 Smart Voltage Regulator Peripheral Card Applications
MC33565 Drop Voltage Regulator designed computer peripheral card applications, allowing glitch-free transitions from "sleep" "active" system modes. internal logic circuitry detect whether there supply ("active" system mode) auxiliary supply ("sleep" system mode). guaranteed regulated output voltage always available even main supply drops out. regulated output voltage provided either internal dropout V-to-3.3 voltage regulator external P-channel MOSFET, depending system being "active" "sleep" mode.
INTELLIGENT REGULATOR WITH SMART BYPASS CONTROL
Glitch-Free Transition from "Sleep" "Active" Mode Compatible with Instantly Available Systems Output Current Output Regulated over Temperature Excellent Line Load Regulation (0.4%) Prevents Reverse Current Flow during Sleep Mode
MARKING DIAGRAM
SOIC-8 SUFFIX CASE
MC565 ALYW
Applications
Computer Ethernet PCI/NIC Cards
+3.3
Assembly Location Wafer Year Work Week
Simplified Block Diagram
CONNECTIONS
Drive +3.3 Vout Sense
Compensation Hysteresis
Hyst Comp Driver Drive External P-channel MOSFET +3.3 Vout
+3.3
Pins Connected
Detect
detect Vref
ORDERING INFORMATION
Device +3.3 Vout MC33565D MC33565DR2 Package SOIC-8 SOIC-8 Shipping Units Rail 2500 Tape Reel
Sense External
Semiconductor Components Industries, LLC, 2001
April, 2001 Rev.
Publication Order Number: MC33565/D
MC33565
MAXIMUM RATINGS 25°C, unless otherwise noted) (Note
Parameter Input Voltage, Symbol Vmax Vmin Operating Ambient Temperature Operating Junction Temperature Lead Temperature (Soldering, seconds) Storage Temperature Range Package Thermal Resistance, Junction Ambient Thermal Resistance, Junction Case Tstg (Note Value -0.5 +150 +150 Unit °C/W °C/W
Minimum test board with wide thick copper traces inch long.
ELECTRICAL SPECIFICATIONS (Notes
Parameter Drive High Delay (Vin ramping CDrive measured from VthresHi VDrive Drive Delay (Vin ramping down) CDrive measured from VthresLo VDrive Symbol Unit
Detect Thresholds Diagram. Recommended source impedance supply: 0.25 This will ensure that Rsource Vhyst, thus avoiding drive toggling during detect threshold transitions. Figure Application Block Diagram. Timing Diagram.
ELECTRICAL CHARACTERISTICS (Note
Characteristic Supply Voltage Range Reverse Leakage Current from Output VAux quiescent current quiescent current, operating Load Capacitance (Note Symbol Ireverse Cload Unit
REGULATOR OUTPUT
Output Voltage (4.3 25°C -5°C 150°C) In-to-Out Voltage (3.9 Vaux Voltage Voltage (Vin Line Regulation Load Regulation Short Circuit Current +3.3 Vout 3.267 3.234 Voutmax 3.30 3.30 3.333 3.366
DETECT
Threshold Voltage falling) High Threshold Voltage rising) Hysteresis VthresLo VthresHi VHyst 0.12 4.02 4.17 0.15 0.18
-5°C 70°C, Cload unless otherwise noted minimum over temperature; recommended; maximum.
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MC33565
ELECTRICAL CHARACTERISTICS (continued) (Note DRIVE OUTPUT
Characteristic Output peak source Current VthresHi, current into Output peak sink Current VthresLo, current into Output Voltage (IoL VthresLo) High Output Voltage (IoH -5°C 70°C, Cload unless otherwise noted Symbol Ipeak Ipeak Vin-0.85 Unit mVdc
DEVICE MARKING
Device MC33565D Type Sub-type Marking (1st Line) MC565
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MC33565
+3.3 Compensation Hysteresis Hyst Comp Driver Drive External P-channel MOSFET
+3.3 Vout Detect Vref detect
+3.3 Vout Sense
External
Figure Functional Block Diagram ASSIGNMENTS FUNCTIONS
NAME +3.3 Sense +3.3 Vout Drive DESCRIPTION This input supply Typical voltage Reserved Auxiliary input. Typical voltage Logic Power Gnd. Load-sense voltage input internal regulator. output provided application circuit (output current sourced this from input.) This output drives P-channel MOSFET with "effective" gate capacitance. Recommended device MGSF1P02ELT MOSFET. Drive active internal pull-up pull-down circuitry guarantee fast transitions.
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MC33565
OPERATING DESCRIPTION MC33565 designed power managed computer applications such peripheral card interface (PCI) network interface cards (NIC) where glitch-free transition between +3.3 necessary. this type application, presence supply represents "active" system mode, while presence +3.3 represents "sleep" system mode. MC33565 complies with instantly available requirements specified Advanced Configuration Power Interface (ACPI) standards Intel, Microsoft, Toshiba. regulated output voltage +3.3 available even when supply been shut down only +3.3 auxiliary supply available. MC33565 dual inputs, +3.3 Vin. functions linear regulator when greater than 4.02 Below this threshold value, linear regulator turns auxiliary DRIVE feature allows external P-channel MOSFET supply power output. MC33565 connects +3.3 auxiliary power supply directly output P-channel MOSFET.
Detect P-Channel MOSFET Polarity
imperative that polarity P-channel MOSFET observed because P-channel MOSFET body diode will connected between auxiliary power supply load. P-channel MOSFET drain connected +3.3 auxiliary power supply; source connected load; gate connected DRIVE OUT. polarity reversed with drain connected load source connected auxiliary supply, body diode could forward biased auxiliary supply present. Consequently linear regulator would turn would supply current everything auxiliary supply rail.
Hysteresis
internal DETECT typical high threshold voltage 4.17 typical threshold voltage 4.02 This results typical hysteresis noise immunity. input supply voltage, Vin, must drop while linear regulator supplying power load before auxiliary DRIVE enabled.
External Compensation
Internal circuitry detects system being powered from supply auxiliary supply. During normal operating conditions, MC33565 powered supply. regulated output voltage +3.3 provided internal drop V-to-3.3 voltage regulator. gate P-channel MOSFET driven high therefore disabled. supply available supply voltage drops below typical threshold value 4.02 DRIVE goes low. This enables external P-channel MOSFET, connecting +3.3 auxiliary supply load allowing load remain powered even though supply available. supply voltage begins rise, linear regulator output will disabled until reaches typical threshold voltage 4.17 load continues powered auxiliary DRIVE while reaches threshold voltage. When reaches threshold voltage, gate external P-channel MOSFET driven high turns off. detect logic active throughout entire range supply ramp-up. DRIVE signal never turned inappropriately during ramp-up supply. +3.3 output voltage never drops below while supply above DETECT minimum threshold
Input Blocking
external compensation capacitor with minimum value required linear regulator stable. Increasing capacitance will improve overall transient response. equivalent series resistance (ESR) capacitor should less than order output voltage maintained within tight tolerance.
Sense
SENSE provides tight regulation load voltage while supply present even with varying load current. take advantage SENSE PIN, connect close load possible. separate trace connect source MOSFET load. Refer Figure
Sense
Figure Board Layout
internal pass transistor drop regulator (LDO) ensure that significant reverse current will flow from Vout when input powered +3.3 supply present.
component layout shown Figure designed input range output voltage range 3.267 3.333 output current
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MC33565
Current Limit Thermal Shutdown
Full protection with both current limit thermal shutdown provided. Internal thermal limiting circuitry provided protect integrated circuit event that maximum junction temperature exceeded. When activated, typically 170°C, output disabled. There
Vaux
hysteresis built into thermal limiting circuit. result, device overheating, output will appear oscillating. This feature provided prevent catastrophic failures from accidental device overheating. intended used substitute proper heatsinking.
Motherboard/ Mainboard Slot
Drive
+3.3 Vout MC33565
+3.3
Sense
NIC/Card Circuitry
Figure Application Block Diagram
Regulator Bypass MOSFET
+3.3 Vaux From Motherboard (e.g., Slot)
Circuitry (Network Card/Modem/etc.)
MC33565 Intelligent
Sense
+3.3 Vout
Figure Typical Application Schematic
Input +3.3 Vout
Drive
MTDF1C02HD
+3.3 Vout Sense
33565
MTDF1C02HD
Figure Alternative Application: Card Input with Swap Circuitry
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MC33565
TYPICAL CHARACTERISTICS
4.4V VTH(HI) VTH(LO) 4.4V
VHYST
3.8V
3.8V
2.0V
2.0V
2.0V
2.0V
NOTE: rise fall times (10% 90%)
NOTE: rise fall times (10% 90%)
Figure Detect Thresholds Diagram
Figure Timing Diagram
Vout capacitor Phase Margin Gain (dB)
Vout capacitor
Phase Margin Gain (dB)
Phase Margin
Phase Margin
Gain
Gain
Frequency (Hz)
Frequency (Hz)
NOTE: Vout capacitor over operating temperature range. Maximum permissible over operating temperature range.
Figure Predicted Gain Phase Zero Load Current
Figure Predicted Gain Phase Full Load Current
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MC33565
4.35 DRIVE HIGH VOLTAGE (VOLTS) 4.30 4.25 4.20 4.15 4.10 4.05 4.00 TEMPERATURE (°C) DRIVE VOLTAGE (VOLTS) +3.3 IDrive 0.0156 0.0154 0.0152 0.0150 0.0148 0.0146 0.0144 0.0142 0.0140 0.0138 0.0136 +3.3 IDrive
TEMPERATURE (°C)
Figure Drive High Voltage (external P-channel MOSFET turned off) versus Ambient Temperature
Figure Drive Voltage (external P-channel MOSFET turned versus Ambient Temperature
24.5 DRIVE SOURCE CURRENT (mA) 24.0 DRIVE SINK CURRENT (mA) 23.5 23.0 22.5 22.0 21.5 21.0 20.5 20.0 19.5 Drive
39.5 39.0 38.5 38.0 37.5 37.0 36.5 36.0 35.5 35.0 TEMPERATURE (°C) Drive
TEMPERATURE (°C)
Figure Drive Peak Sink Current versus Ambient Temperature
Figure Drive Peak Source Current versus Ambient Temperature
3.304 Vout OUTPUT VOLTAGE (VOLTS) 3.302
Iout LINE REGULATION (mV)
Vout Iout
3.300 3.298 3.296 3.294 3.292 3.290 TEMPERATURE (°C)
TEMPERATURE (°C)
Figure Output Voltage versus Ambient Temperature
Figure Line Regulation versus Ambient Temperature
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MC33565
QUIESCENT CURRENT (mA) Vout Iout +3.3 Iout TEMPERATURE (°C)
LOAD REGULATION (mV)
TEMPERATURE (°C)
Figure Load Regulation versus Ambient Temperature
Figure Quiescent Current versus Ambient Temperature only)
QUIESCENT CURRENT (mA) SHORT CIRCUIT CURRENT (mA) +3.3 Iout
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure Quiescent Current versus Ambient Temperature (3.3 only)
Figure Short Circuit Current versus Ambient Temperature
thresLo, LOWER COMPARATOR THRESHOLD
REVERSE CURRENT TEMPERATURE (°C) Vout measured
4.024 4.022 4.020 4.018 4.016 4.014 4.012 4.010 4.008 4.006 4.004 4.002
TEMPERATURE (°C)
Figure Reverse Leakage Current from Output versus Ambient Temperature
Figure Lower Comparator Threshold versus Ambient Temperature
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MC33565
thresHi UPPER COMPARATOR THRESHOLD 4.175 4.170 4.165 4.160 4.155 4.150 4.145 1.40 DRIVE RISE DELAY 1.35 1.30 1.25 1.20 1.15 1.10 1.05 TEMPERATURE (°C)
TEMPERATURE (°C)
1.00
Figure Upper Comparator Threshold versus Ambient Temperature
DRIVE FALL DELAY Trace Trace
Figure Drive Rise Delay (after crosses threshold) versus Ambient Temperature
Falling V-Threshold
Regulator Output
Vaux Bypass Mode
Vout Switching Bypass Mode TEMPERATURE (°C) 1.00 20.0 4.50 TRACE stepping from VthresLo TRACE Vout switching from regulator output Vaux
Figure Drive Fall Delay (after crosses threshold) versus Ambient Temperature
Figure Bypass Mode Transition
Load
Load
Vout Load Transient Response
Figure Load Transient Response
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MC33565
Vout
Vaux Sense
Figure Component Layout
here enable remote sense
Vaux
Figure Copper Layout
PARTS LIST
Reference Part/Description Ceramic Capacitor Tantalum Capacitor MC33565 MGSF1P02ELT Vendor Various Various Semiconductor Semiconductor Notes P-Channel MOSFET
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MC33565
PACKAGE DIMENSIONS
SOIC-8 SUFFIX PLASTIC 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. 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)
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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MC33565/D
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