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APW7025 Datasheet(PDF) 1 Page - Anpec Electronics Coropration |
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APW7025 Datasheet(HTML) 1 Page - Anpec Electronics Coropration |
1 / 6 page Copyright ANPEC Electronics Corp. Rev.P.1 - Mar., 2001 APW7025 www.anpec.com.tw 1 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Advanced PWM and Dual Linear Power Control Features General Description ••••• 3 Regulated Voltage are provided ••••• Switching Power for VTT(1.25V) ••••• Linear1 Regulator for FBVDDQ(2.5V) ••••• Linear2 Regulator for NVVDD(2.05V) ••••• Simple Single-Loop Control Design ••••• Voltage-Mode PWM Control ••••• Excellent Output Voltage Regulation ••••• PWM Output: ±1% ••••• Linear Output: ±3% ••••• Fast Transient Response ••••• High-Bandwidth Error Amplifier ••••• Full 0% to 100% Duty Ratio ••••• Power-Good Output Voltage Monitor ••••• Over-Voltage and Over-Current Fault Monitors ••••• Small Converter Size ••••• Constant Frequency Operation(200kHz) ••••• Programmable Oscillator from 50kHz to 1MHz ••••• Reduce External Component Count ••••• Motherboard Power Regulation for Computers ••••• Low-Voltage Distributed Power Supplies ••••• VGA Card Power Regulation Applications The APW7025 integrates a PWM controller and Dual linear controller, as well as the monitoring and pro- tection functions into a single package , which pro- vides three controlled power outputs with over-volt- age and over-current protections. The PWM control- ler regulates the DDR reference voltage with a syn- chronous-rectified buck converter. The linear control- ler regulates power for microprocessor core voltage and Memory Voltage. The precision reference and voltage-mode PWM control provide ±2% static regulation. The linear controller drives an external N-channel MOSFET to provide adjustable voltage. The APW7025 monitors all the output voltages , and a single Power Good signal is issued when the PWM Voltage is within 10% of the 1.25V setting and the other output levels are above their under-voltage thresholds. Additional built-in over-voltage protec- tion for the PWM output uses the lower MOSFET to prevent output voltages above 115% of the 1.25V setting. The PWM over-current function monitors the output current by using the voltage drop across the upper MOSFET’s R DS(ON) , eliminating the need for a current sensing resistor. Pin Description VCC DRIVE2 NC NC LGATE OCSET VSEN1 NC NC PGOOD VSEN2 PGND FB COMP VSEN3 GND 1 2 3 4 5 6 7 8 12 11 UGATE 10 9 16 15 14 13 17 18 19 20 24 23 22 21 VAUX DRIVE3 PHASE NC SS FAULT NC SOP24 |
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