PWM and Triple Linear Power Controller for Home Gateway Applications

The ISL6432 provides the power control and protection for four output voltages for use with high-performance microprocessor and embedded controller based communications chip sets. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as monitoring and protection functions into a 16-lead SOIC package.

Features

• Provides 4 Regulated Voltages

- Memory Core, Embedded Controller/DSP, Tuner

• Drives Bipolar Linear Pass Transistors

• Externally Resistor-Adjustable Outputs

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast PWM Converter Transient Response

- High-Bandwidth Error Amplifier

- Full 0 to 100 Duty Ratio

• Excellent Output Voltage Regulation

- All Outputs: ±2 Over Temperature

• Overcurrent Fault Monitors

- Switching Regulator Does Not Require Extra Current Sensing Element, Uses MOSFET’s rDS(ON)

• Small Converter Size

- 300kHz Constant Frequency Operation

- Small External Component Count

• ACPI Compatible

• Voltage Sequencing

Applications

• Low-Power Distributed DC-DC Conversion

• Cable Modem and DSL Modem Power Regulation

• High Performance Memory Applications