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APW7035

Anpec Electronics
Part Number APW7035
Manufacturer Anpec Electronics
Description Advanced PWM and Linear Power Controller
Published Mar 30, 2006
Detailed Description APW7035 Advanced PWM and Linear Power Control Features • 2 Regulated Voltage are provided General Description The APW7...
Datasheet PDF File APW7035 PDF File

APW7035
APW7035

Overview
APW7035 Advanced PWM and Linear Power Control Features • 2 Regulated Voltage are provided General Description The APW7035 integrates PWM controller and linear controller , as well as the monitoring and protection functions into a single package , which provides two controlled power outputs with over-voltage and overcurrent protections.
The PWM controller regulates the DDR reference voltage (1.
25V) or GPU Voltage (2.
05V) with a synchronous-rectified buck converter.
The linear controller regulates power for Memory Voltage.
The precision reference and voltage-mode PWM control provide ±1% static regulation.
The linear controller drives an external N-channel MOSFET to provide adjustable voltage.
The APW7035 monitors all the output voltages , and a single Power Good signal is issued when the PWM Voltage is within ±10% of the DAC setting and the Linear regulator output levels are above their undervoltage thresholds.
Additional built-in over-voltage protection for the PWM output uses the lower MOSFET to prevent output voltages above 115% of the DAC 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.
The APW7035A/B/C/D support a TTL 3-input Digital to Analog converter that adjusts the synchronousrectified buck converter output from 1.
00V to 3.
20V , reference to Table1.
− Switching Power for Fixed Voltage (1.
25V / 2.
05V) or Adjustable Voltage − Linear Regulator for FBVDDQ(2.
5V) • • 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) − Reduce External Component Count Applications • • • • Motherboard Power Regulation for Compute...


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