DESCRIPTION
The LTC®1646 is a hot swap controller that allows a board to be safely inserted and removed from a live CompactPCI bus slot. Two external N-Channel transistors control the 3.3V and 5V supplies. The supplies can be ramped-up in current limit or at a programmable rate. Electronic circuit breakers protect both supplies against overcurrent fault conditions.

FEATURES
■ Allows Safe Board Insertion and Removal from a
   Live, CompactPCITM Bus
■ Controls 3.3V and/or 5V Supplies
■ Programmable Foldback Current Limit During
   Power-Up
■ Dual Level Circuit Breakers Protect Supplies from
   Overcurrent and Short-Circuit Faults
■ Local_PCI_RST# Logic On-Chip
■ PRECHARGE Output Biases I/O Pins During Card
   Insertion and Extraction
■ User Programmable Supply Voltage Power-Up Rate
■ 15V High Side Drive for External N-Channels
■ PWRGD, RESETOUT and FAULT Outputs

APPLICATIONS
■ Hot Board Insertion into CompactPCI Bus