LTC4280
Hot Swap Controller with
2
I C Compatible Monitoring
FEATURES DESCRIPTION n The LTCВ®4280 Hot Swapв„ў controller allows a board to be
safely inserted and removed from a live backplane. Using
an external N-channel pass transistor, board supply voltage
and inrush current are ramped up at an adjustable rate.
An I2C interface and onboard ADC allow for monitoring
of load current, voltage and fault status. n Allows Safe Insertion into Live Backplane
8-Bit ADC Monitors Current and Voltage
I2C/SMBus Interface
Wide Operating Voltage Range: 2.9V to 15V
Adjustable Overcurrent Filter Time
High Side Drive for External N-Channel MOSFET
No External Gate Capacitor Required
Input Overvoltage/Undervoltage Protection
Optional Latchoff or Auto-Retry After Faults
Alerts Host After Faults
Inrush Current Limit with Foldback
Available in 24-Pin 4mm Г— 5mm QFN Package The device features adjustable analog foldback current
limit and a FILTER pin which configures the time spent in
overcurrent before declaring a fault. An I2C interface may …