LTC4282

LTC4282 High Current Hot Swap Controller with I2C Compatible Monitoring FEATURES n Allows Safe Board Insertion Into Live Backplane n 12-/16-Bit ADC with ±0.9% Total Unadjusted Error n Monitors Current, Voltage, Power and Energy n Controls Two Parallel N-Channel MOSFETs for SOA Sharing in High Current Applications n Internal EEPROM for Nonvolatile Configuration n Wide Operating Voltage Range: 2.9V to 33V n I2C/SMBus Digital Interface (Coexists with PMBus Devices) n 12V Gate Drive for Lower MOSFET RDS(ON) n Programmable Current Limit with 2% Accuracy n MOSFET Power Limiting with Current Foldback n Continuously Monitors MOSFET Health n Stores Minimum and Maximum Measurements n Alerts When Alarm Thresholds Exceeded n Input Overvoltage and Undervoltage Protection n Internal ±5% or External Timebases n 32-Pin 5mm × 5mm QFN Package n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Enterprise Servers and Data Storage Systems n Network Routers and Switches n Base Stations n Platform Management DESCRIPTION The LTC®4282 hot swap controller allows a board to be safely inserted and removed from a live backplane. Using one or more external N-channel pass transistors, board supply voltage and inrush current are ramped up at an adjustable rate. An I2C interface and onboard ADC allows for monitoring of board current, voltage, power, energy and fault status. The device features analog foldback current limiting and supply monitoring for applications from 2.9V to 33V. Dual 12V g...