General Description

The MAX8688 fully integrated digital power-supply controller and monitor IC works with any existing POL (point-of-load) power supply to provide complete digital programmability. By interfacing to the reference input, feedback node, and output enable, the MAX8688 takes control of the POL to provide functions such as perfect tracking, sequencing, margining, and dynamic adjustment of the output voltage.

Features

♦ PMBus Interface for Programming, Monitoring,

   Sequencing Up and Down, and Accurate OutputVoltage Control

♦ Controls Output Voltage with 0.2 Accuracy for

   Line, Load, and Temperature Variations

♦ Output Voltage, Output Current, and Temperature

   Monitoring with Adjustable Monitor Rate

♦ Current Measurement with 2.6 Accuracy

♦ Programmable Soft-Start and Soft-Stop Ramp

   Rates

♦ Controls Up to 26 Power Supplies with Hardwired

   Address Pins and Up to 127 POLs with Software

   Addressing

♦ Compatible with REFIN and FB Terminals of POL

   Power Supplies

♦ Protection for POL Against Overvoltage,

   Undervoltage, Overcurrent, Negative Current and

   Overtemperature Faults with No Action, Latch and

   Retry (Hiccup) Options

♦ Open-Drain FLT Signal for Fault Detection

♦ Master-Slave Clocking Option Eliminates External

   Clock Requirement and Provides Accurate Timing

   Reference

♦ External EEPROM Interface for Auto-Programming

   on Power-Up

Applications

   Telecom Networking

   DC-DC Modules and POLs

   Servers

   High-Reliability Infrastructure Equipment