Hot swap controller for CompactPCI

24 October 2001 Power Electronics / Power Management

Linear Technology's LTC1644 CompactPCI Hot Swap controller controls all four supply voltages as well as precharging the databus pins and generating the local reset signal. Internal switches control the ±12 V supplies while external N-channel transistors control the 3,3 V and 5 V supplies. Circuit breakers on all supplies feature foldback current limiting allowing overcurrent transients to be limited without latching off. Short-circuit faults cause the circuit breakers to latch off after a programmed time. Controlled ramping of the supplies limits inrush current. Precharge bias is 1 V. The system reset signal is logically combined with the healthy signal to create a local reset signal. These features allow CompactPCI cards to manage the power supplies during hot swapping and protect the card from overcurrent faults. The part is offered in 20-pin SSOP package.

Memec SA

(021) 674 4103

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