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