LTC4421
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 parators 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 Systems
DESCRIPTION
The LTC®4421 connects one of two input supplies to a mon 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 switch the large...
