General Description

The APW7045 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 termination voltage (1.25V) or GPU Voltage (2.05V) with a synchronous-rectified buck converter.

Features

• 2 Regulated Voltage are provided

−Switching Power for Fixed Voltage (1.0V)

−Linear Regulator for VMEM(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

−200KHz Free-Running Oscillator ; Progammable from 50KHz to 800KHz

−Reduce External Component Count

Applications

• Motherboard Power Regulation for Computers

• Low-Voltage Distributed Power Supplies

• VGA Card Power Regulation

• DDR SDRAM Power Regulation