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