LTC4236IUFD-2#PBF

LTC4236 is a dual ideal diode-OR and single Hot Swap controller with current monitor. It offers ideal diode-OR and Hot Swap functions for two power rails by controlling external N-channel MOSFETs. MOSFETs acting as ideal diodes replace two high power schottky diodes and the associated heat sinks, saving power and board area. A Hot Swap control MOSFET allows a board to be safely inserted and removed from a live back plane by limiting inrush current. The supply output is also protected against short-circuit faults with a fast acting foldback current limit and electronic circuit breaker. It regulates the forward voltage drop across the ideal diode MOSFETs to ensure smooth current transfer from one supply to the other without oscillation. The ideal diode MOSFETs turn on quickly to reduce the load voltage droop during supply switchover. It is used in applications such as redundant power supplies, high availability systems and servers, telecom and network infrastructure.

• Ideal diode-OR and inrush current control for redundant supplies
• Operating voltage range from 2.9V to 18V
• Current monitor output, controls N-channel MOSFETs
• Limits peak fault current in 1µs, adjustable current limit with foldback
• Adjustable start-up and current limit fault delay, smooth switchover without oscillation
• Fault, power good and diode status outputs, automatic retry after fault
• Input supply current is 2.7mA typ at (TA = 25°C, VIN = 12V)
• Internal regulator voltage is 5V typ at (TA = 25°C, VIN = 12V)
• Operating temperature range from -40°C to 85°C
• Package style is 28-lead plastic QFN

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