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LTC4222 - Dual Hot Swap Controller

General Description

The LTC®4222 Hot Swap™ controller allows two power paths to be safely inserted and removed from a live backplane.

Using external N-channel pass transistors, board supply voltages and inrush currents are ramped up at an adjustable rate.

Key Features

  • n Allows Safe Insertion Into a Live Backplane n 10-Bit ADC Monitors Currents and Voltages n I2C/SMBus Interface n Wide Operating Voltage Range: 2.9V to 29V n dI/dt Controlled Soft-Start n High Side Drive for External N-Channel MOSFETs n No External Gate Capacitors Required n Input Overvoltage/Undervoltage Protection n Optional Latchoff or Auto-Retry After Faults n Alert Host After Faults n Inrush Current Limit with Foldback n Available in 32-Pin (5mm × 5mm) QFN and 36-Pin SSOP Packages.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FEATURES n Allows Safe Insertion Into a Live Backplane n 10-Bit ADC Monitors Currents and Voltages n I2C/SMBus Interface n Wide Operating Voltage Range: 2.9V to 29V n dI/dt Controlled Soft-Start n High Side Drive for External N-Channel MOSFETs n No External Gate Capacitors Required n Input Overvoltage/Undervoltage Protection n Optional Latchoff or Auto-Retry After Faults n Alert Host After Faults n Inrush Current Limit with Foldback n Available in 32-Pin (5mm × 5mm) QFN and 36-Pin SSOP Packages APPLICATIONS n Live Board Insertion n Electronic Circuit Breakers n Computers, Servers n Platform Management LTC4222 Dual Hot Swap Controller with I2C Compatible Monitoring DESCRIPTION The LTC®4222 Hot Swap™ controller allows two power paths to be safely inserted and removed from a live backplane.