Synchronous-Rectifier Controller PentiumII Microprocessor Simple
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APW7004
Synchronous-Rectifier Controller PentiumII Microprocessor
Simple Single-Loop Control Design-VoltageMode Control Fast Transient Response High-Bandwidth Error Amplifier 5-Bit Digital-to-Analog Output Voltage Selection Wide Range from1.3VDC 3.5VDC 0.1V Binary Steps from 2.1VDC 3.5VDC .05V Binary Steps from 1.3VDC 2.05 86is trademark Cyrix Corporation Alphais trademark Digital Equipment Corporation trademark Advanced Micro Devices, Inc. Pentium trademark Intel Corporation PowerPC trademark
General Description
APW7004 provides complete control multiple protection DC-DC converter optimized high performance microprocessor applications. designed drive N-Channel MOSFETs synchronous-rectified buck topology. APW7004 integrates output voltage control, output voltage programming, monitoring protection functions into single chip APW7004 includes 5-bit digital-to-analog converter (DAC) that provides easily adjustable precisely output voltage from 2.1VDC 3.5VDC increments from 2.05 increments. selected output voltage maintained within accuracy over temperature line voltage variations. With 200kHz free-running triangle-wave oscillator error amplifier featuring 15MHz unity-gain bandwidth 6V/us slew rate inside chip, APW7004 implement simple, single feedback loop, voltage-mode control topology with high transient performance. APW7004 also features with multiple protections against over-current over-voltage conditions inhibiting operation. APW7004 uses RDS(ON) upper MOSFET current sensing element which eliminates demend extra component. APW7004 also monitors output voltage using comparator with hysteresis that tracks output issues Power Good signal once output within ±10%.
VID0-4 Input Pins with Pull High Resistors Built Power-Good Output Voltage Monitor, PGOOD with Open Collector Configuration Over-Voltage Over-Current Fault Monitors Uses MOSFET's RDS(ON) Current Sensing,
Extra Element Required
Programmable Switching Frequency Setting 200kHz Free-Running Oscillator
Applications
Power Supply Pentium Pentium ProTM, Pentium II,PowerPC AlphaMicroprocessors
High-Power 3.xV below) DC-DC Regulators Low-Voltage Distributed Power Supplies
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
APW7004
Description
VSEN OCSET VID0 VID1 VID2 VID3 VID4 COMP LGATE PGND BOOT UGATE PHASE PGOOD
Ordering Information
APW7004
Handling Code Temp. Range Package Code Package Code Temp. Range Handling Code Tube
Tape Reel
Block Diagram
VSEN
110%
Power Reset
DETN (Power Reset)
PGOOD OCSET
UGATE
115%
PHASE
200µA DETN (Power Reset)
SOFT START
BOOT UGATE PHASE
DETN,
VID0 VID1 VID2 VID3 VID4
CONVERER (DAC)
ERRAMP
DRIVER
LGATE PGND
DETN (Power Reset)
COMP
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
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APW7004
Absolute Maximum Ratings
Symbol VBOOT -VPHASE Parameter Supply Voltage Boot Voltage Input Output Voltage Operating Ambient Temperature Range Junction Temperature Range Storage Temperature Range Soldering Temperature Rating +150 300,10 seconds Unit
Thermal Characteristics
Symbol (with Copper)
Parameter Thermal Resistance Free
Value
Unit °C/W
Electrical Characteristics
Recommended operating conditions unless otherwise noted
Symbol Parameter Test Conditions UGATE LGATE open Vocset=4.5V Vocset=4.5V Open Open APW7004 Min. Typ. Max. Unit VP-P V/µs
Supply Current Nominal Supply Power-on Reset Rising Threshold Falling Threshold Oscillator Free Running Frequency VOSC Ramp Amplitude Reference DAC(VID0-VID4) Input Voltage DAC(VID0-VID4) Input High Voltage DACOUT Voltage accuracy Error Amplifier Gain Gain-Bandwidth Product Slew Rate
-1.0 +1.0
COMP=20pF
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
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APW7004
Electrical Characteristics CONT.
Symbol Gate Drivers RUG, SOURCE Upper Gate Source RUG, SINK Upper Gate Sink RLG, SOURCE Lower Gate Source RLG, SINK Lower Gate Sink Protection Over-Voltage Trip (VSEN /DACOUT) IOCSET IOVP OCSET Current Source Souring Current Soft Start Current Upper Threshold (VSEN /DACOUT) VSEN Rising VOCSET=4.5VDC VSEN =5.5V ,VOVP=0V VBOOT-VPHASE =12V VBOOT-VPHASE =12V VCC=12V VCC=12V Parameter Test Conditions APW7004 Min. Typ. Max. Unit
Power Good Lower Threshold (VSEN /DACOUT) VSEN Rising Upper Lower Hysteresis (VSEN /DACOUT) Threshold PGOOD Voltage IPGOOD= -5mA
VPGOOD
Function Description
VSEN (pin Connect this converter's voltage output. PGOOD comparator circuits monitor output voltage status over voltage protection using this signal. OCSET(pin Connect resistor(ROCSET) from this drain upper MOSFET. internal 200mA current source (IOCS), ROCSET, upper MOSFET's onresistance (RDS(ON)) converter over-current (OC) trip point according following equation: IPEAK= ROCSET /RDS(ON) over-current trip resets soft-start function. (Pin Connect capacitor from this ground. This capacitor, along with internal 10mA current source,
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
sets soft-start interval converter. VID0-4 (Pins 4-8) VID0-4 input pins 5-bit DAC. states these five pins decide internal voltage reference (DACOUT). level DACOUT sets converter output voltage also sets PGOOD thresholds. Table specifies DACOUT combinations inputs. COMP (pin (pin COMP accessiable pins error amplifier. inverting input error amplifier COMP output error amplifier. These pins provide compensation voltage-control feedback loop converter. (Pin signal ground voltage levels measured with respect this pin.
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APW7004
Electrical Characteristics Cont.
PGOOD (PIin PGOOD open collector output used indicate status converter output voltage. This pulled when converter output within ±10% DACOUT reference voltage. PGOOD floating when exists. PHASE (pin (pin Connect PHASE source upper MOSFET. This used monitor voltage drop across upper MOSFET over-current protection. provides oscillator switching frequency adujstment. connecting resistor (RT) from this GND, nominal 200kHz switching frequency increased. Conversely. connecting pull-up resistor (RT) from this reduces switching frequency. (pin reports event over-voltage condition Converter output rising more than DACset voltage triggers high output this with typical 30mA sourcing capability which used drive external device disables gate drive circuitry.
UGATE (pin Connect UGATE upper MOSFET gate. This enables gate drive signal drive upper MOSFET BOOT (pin BOOT provides bias voltage upper MOSFET gate driver. bootstrap circuit could used pump BOOT voltage enforcing driving capability gate driver improving performance upper MOSFET. PGND(pin PGND provides power ground connection. Connect this source lower MOSFET. LGATE (pin Connect LGATE lower MOSFET gate. This enables gate drive signal drive lower MOSFET. (pin Connect voltage supply. This supplies bias chip.
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
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APW7004
Table Output Voltage Program
Name
VID4 VID3 VID2 VID1 VID0 Nominal Output Voltage Dacout VID4
Name
VID3 VID2 VID1 VID0 Nominal Output Voltage Dacout
1.35 1.45 1.55 1.65 1.75 1.85 1.90 1.95 2.00 2.05
Application Schematic
+12V
APW7004
PGOOD
MONITOR PROTECTION
OCSET
BOOT
UGATE
VID0 VID1 VID2 VID3 VID4
PHASE
VOUT
LGATE PGND
COMP
VSEN
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
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APW7004
Packaging Information
300mil Reference JEDEC Registration MS-013)
GAUGE PLANE
Millimeters Min. 2.35 0.10 0.33 7.40 0.40 Max. 2.65 0.30 0.51 7.60 10.65 1.27
Variations- Variations SO-16 SO-18 SO-20 SO-24 SO-28 SO-14 Min. 10.10 11.35 12.60 15.20 17.70 8.80 Max. 10.50 11.76 15.60 18.11 9.20
Inches Min. Max. 0.093 0.1043 0.004 0.0120 0.013 0.020 variations 0.2914 0.2992 0.050BSC 0.394 0.016 0.419 0.050
Variations- Variations SO-16 SO-18 SO-20 SO-24 SO-28 SO-14 Min. Max. 0.398 0.413 0.447 0.463 0.496 0.512 0.599 0.614 0.697 0.713 0.347 0.362
variations 1.27BSC
variations
variations
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
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APW7004
Physical Specifications
Terminal Material Lead Solderability Packaging Solder-Plated Copper (Solder Material 90/10 63/37 SnPb) Meets Specification RSI86-91, ANSI/J-STD-002 Category 1000 devices reel
Reflow Condition
(IR/Convection Reflow)
Reference JEDEC Standard J-STD-020A APRIL 1999
temperature
Peak temperature
183°C Pre-heat temperature
Time
Classification Reflow Profiles
Convection Convection Average ramp-up rate(183°C Peak) 3°C/second max. seconds Preheat temperature 25°C) seconds Temperature maintained above 183°C Time within actual peak temperature seconds Peak temperature range +5/-0°C +5/-0°C Ramp-down rate /second max. minutes max. Time 25°C peak temperature /second max.
seconds 215-219°C +5/-0°C /second max.
Package Reflow Conditions
pkg. thickness 2.5mm bgas Convection +5/-0 215-219 IR/Convection +5/-0 pkg. thickness 2.5mm pkg. volume pkg. thickness 2.5mm pkg. volume Convection +5/-0 +5/-0 IR/Convection +5/-0
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Copyright ANPEC Electronics Corp. Rev. Mar., 2001
APW7004
Reliability test program
Test item SOLDERABILITY HOLT Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD Description 245°C 1000 Bias Hrs, 121°C -65°C 150°C, Cycles VHBM 2KV, 200V 10ms 100mA
Carrier Tape Reel Dimensions
Application
SOP-20
330±1
12.75 ±0.15 24.4 +0.2
1.75±
Application SOP-20 11.5 1.5+0.1
1.5+0.25
2.5± 0.35±0.013
(mm)
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
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APW7004
Cover Tape Dimensions
Carrier Width Cover Tape Width 21.3 (mm)
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., 2001
www.anpec.com.tw
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