General Description
The MAX6877/MAX6878/MAX6879 multivoltage power trackers/sequencers/supervisors monitor up to three system voltages and provide proper power-up and power-down control for systems requiring voltage tracking or sequencing. These devices ensure controlled voltage tracking within a specified range or sequencing in the proper order as system power supplies are enabled. The MAX6877/MAX6878/MAX6879 generate all required voltages and timing to control up to three external n-channel pass FETs for the OUT1/OUT2/OUT3 supply voltages (see the Selector Guide for different features of each device).

Features
♦ Pin-Selectable Tracking or Sequencing Control
   for Up to Three Supply Voltages
♦ Capacitor-Adjustable Power-Up/Down Tracking
   Slew Rate
♦ Capacitor-Adjustable Power-Up Sequencing Delay
♦ Internal Charge Pumps to Enhance External
   n-Channel FETs
♦ Capacitor-Adjustable Timeout Period Power-Good
   Output (MAX6877/MAX6878)
♦ Adjustable Undervoltage Lockout or
   Logic-Enable Input
♦ Internal 100Ω Pulldown for Each Output to
   Discharge Capacitive Load Quickly
♦ 0.5V to 5.5V Nominal IN_/OUT_ Range
♦ 2.7V to 5.5V Operating Voltage Range
♦ Immune to Short Voltage Transients
♦ Small 4mm x 4mm 24-Pin or 16-Pin Thin QFN
   Packages

Applications
   Multivoltage Systems
   Networking Systems
   Telecom
   Storage Equipment
   Servers/Workstations