LTC1422 Datasheet

• Allows Safe Board Insertion and Removal from a Live Backplane
• System Reset Output with Programmable Delay
• Programmable Electronic Circuit Breaker
• User-Programmable Supply Voltage Power-Up Rate
• High Side Driver for an External N-Channel FET
• Controls Supply Voltages from 2.7V to 12V
• Undervoltage Lockout
• Soft Reset Input
• Glitch Filter on RESET

• Hot Board Insertion
• Electronic Circuit Breaker

The LTC1422 is an 8-pin Hot Swap^™ controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped up at a programmable rate. A high side switch driver controls the N-channel gate for supply voltages ranging from 2.7V to 12V.

A programmable electronic circuit breaker protects against shorts. The RESET output can be used to generate a system reset when the supply voltage falls below a programmable voltage. The ON pin can be used to cycle the board power or to generate a soft reset.

The LTC1422 is available in 8-pin PDIP and SO packages.