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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