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APW7025

Anpec Electronics Coropration
Part Number APW7025
Manufacturer Anpec Electronics Coropration
Description Advanced PWM and Dual Linear Power Controller
Published Nov 17, 2008
Detailed Description APW7025 Advanced PWM and Dual Linear Power Control Features • 3 Regulated Voltage are provided • Switching Power for VT...
Datasheet PDF File APW7025 PDF File

APW7025
APW7025

Overview
APW7025 Advanced PWM and Dual Linear Power Control Features • 3 Regulated Voltage are provided • Switching Power for VTT(1.
25V) • Linear1 Regulator for FBVDDQ(2.
5V) www.
DataSheet4U.
com General Description The APW7025 integrates a PWM controller and Dual linear controller, as well as the monitoring and protection functions into a single package , which provides three controlled power outputs with over-voltage and over-current protections.
The PWM controller regulates the DDR reference voltage with a synchronous-rectified buck converter.
The linear controller 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 protection 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 RDS(ON) , eliminating the need for a current sensing resistor.
• 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 Pin Description Applications VCC 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 UGATE PHASE LGATE PGND OCSET VSEN1 FB COMP VSEN3 DRIVE3 GND VAUX • •...


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