LTC1643ALCGN#PBF

LTC1643AL is a Hot Swap™ controller that allows a board to be safely inserted and removed from a live PCI-Bus slot. Two external N-channel transistors control the 3.3V and 5V supplies while on-chip switches control the -12V and 12V supplies. All supply voltages can be ramped up at a programmable rate. An electronic circuit breaker protects all four supplies against overcurrent faults. The foldback current limit feature limits current spikes and power dissipation when shorts occur and allows boards with large capacitances to be powered up without tripping the circuit breaker. The PWRGD output indicates when all of the supply voltages are within tolerance and the FAULT output indicates an overcurrent condition. It is used in application such as PCI-based servers, compact PCI compliant boards etc.

• CompactPCI™ card
• Programmable foldback current limit with circuit breaker
• User-programmable supply voltage power-up rate
• High side drive for external N-channel MOSFETs
• Fault and power-good outputs
• On-chip switches (-12V and 12V )
• Supply current is 3.8mA typical
• Undervoltage lockout is 9.5V typical
• Operating temperature is 0°C to 70°C
• Package style is 16-lead narrow plastic SSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party