LTC1422

LTC1422 Hot Swap Controller FEATURES s s s s s s s s s DESCRIPTIO 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 The LTC®1422 is an 8-pin Hot SwapTM 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. , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. U APPLICATIO S s s Hot Board Insertion Electronic Circuit Breaker TYPICAL APPLICATIO 5V Hot Swap Q1 R1 0.005Ω MTB50N06V VCC R2 10Ω 5% R3 6.81k 1% C1 0.1µF 5 R4 2.43k 1% VOUT 5V CLOAD + CONNECTOR 2 CONNECTOR 1 8 2 VCC ON 7 6 FB SENSE GATE ON/RESET LTC1422 RESET TIMER 3 GND C2 0.33µF 4 1 µP R...