General Description

The MAX6880–MAX6883 dual-/triple-voltage monitors are designed to sequence power supplies during power-up condition. When all of the voltages exceed their respective thresholds, these devices turn on volt ages to the system sequentially, enhancing n-channel MOSFETs used as switches. The time between each sequenced voltage is determined by an external capacitor, thus allowing flexibility in delay timing. The MAX6880/MAX6881 sequence three voltages and the MAX6882/MAX6883 sequence two voltages.

Features

♦ Capacitor-Adjustable Power-Up Sequencing Delay

♦ Internal Charge Pumps to Enhance External n-Channel FETs

♦ Capacitor-Adjustable Timeout Period Power-Good Output (MAX6880/MAX6882)

♦ 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