General Description

The APW7088, two-phase PWM control IC, provides a precision voltage regulation system for advanced graphic microprocessors in graphics card applications. The integration of power MOSFET drivers into the controller IC reduces the number of external parts for a cost and space saving power management solution.

The APW7088 uses a voltage-mode PWM architecture, operating with fixed-frequency, to provides excellent load transient response. The device uses the voltage across the DCRs of the inductors for current sensing. Load line voltage positioning (DROOP), channel-current balance and over-current protection are accomplished through continuous inductor DCR current sensing.

Features

· Voltage-Mode Operation with Current Sharing

- Adjustable Feedback Compensation

- Fast Load Transient Response

· Operate with 8V~13.2VCC Supply Voltage

· Programmable 3-Bit DAC Reference

-±1.5 System Accuracy Over Temperature

· Support Single- and Two-Phase Operations

· 5V Linear Regulator Output on 5VCC

· 8~12V Gate Drivers with Internal Bootstrap Diode

· Lossless Inductor DCR Current Sensing

· Fixed 300kHz Operating Frequency Per Phase

· Power-OK Indicator Output

- Regulated 1.5V on POK

· Adjustable Over-Current Protection (OCP)

· Accurate Load Line (DROOP) Programming

· Adjustable Soft-Start

· Over-Voltage Protection (OVP)

· Under-Voltage Protection (UVP)

· Over-Temperature Protection (OTP)

· QFN4x4 24-Lead Package (QFN4x4-24)

· Lead Free and Green Devices Available (RoHS Compliant)

Applications

· Graphics Card GPU Core Power Supply

· Motherboard Chipset or DDR SDRAM Core Power Supply

· On-Board High Power PWM Converter with Out put Current up to 60A