LTC4421 - Analog Devices

LTC4421 High Power Prioritized PowerPath Controller

The LTC®4421 connects one of two input supplies to a common output based on user-defined priority and validity. By definition, the supply connected to V1 is the higher priority supply, although this can be changed dynamically. External resistive dividers set the undervoltage and overvoltage thresholds that bound the valid voltage window. Strong gate drivers .

Features

n 0V to 36V Wide Operating Range (60V Tolerant) n Drives Large External N-Channel MOSFETs for High Output Current Applications n Accurately Limits Inrush Current n Connects Highest Priority Valid Supply to Output Load n Changes Channel Priority in Real Time n ±2% OV, UV Input Comparators n Individually Adjustable Current Limit Time-Out for Each Channel n Adjustable Input Validation Time n Fast Switchover Minimizes VOUT Droop n 36-Lead 5mm × 6mm QFN and SSOP Packages APPLICATIONS n High Reliability Systems n Server Based Back-Up Systems n Industrial Handheld Instruments n Battery Back-Up System.