The LTC1422 is a hot swap controller from LTC that allows the board to be safely inserted and removed from a live backplane. It has a programmable delay system reset output, a programmable electronic circuit breaker, a user-programmable supply voltage power-up rate, a high side driver for an external N-channel FET, controls supply voltages from 2.7V to 12V, undervoltage lockout and a soft reset input.
The LTC1422 is an 8-pin Hot Swap controller designed to allow a board to be safely inserted and removed from a live backplane. It uses an external N-channel pass transistor to ramp the board supply voltage at a programmable rate, controlled by a high-side driver for supply voltages ranging from 2.7V to 12V.
The device includes a programmable electronic circuit breaker to protect against shorts and a system reset output with a programmable delay. It features a user-programmable supply voltage power-up rate, undervoltage lockout, and a soft reset input with a glitch filter. The LTC1422 is available in 8-pin PDIP and SO packages.
| Supply Voltage Range | 2.7V to 12V |
|---|---|
| Feedback Pin Threshold | 1.232V typical |
| Operating Temperature Range (Industrial) | -40°C to 85°C |
The ON pin is used to cycle board power, generate a soft reset, or reset the electronic circuit breaker.
The programmable electronic circuit breaker protects against shorts by tripping when the voltage across the sense resistor exceeds a threshold.
The LTC1422 is available in 8-pin PDIP and SO packages.