ANALOG DEVICES LTC4352IDD#PBF Ideal Diode Controller, Low Voltage, 2.9 to 18 V, -40 to 85 Deg C, DFN-EP-12

LTC4352 is a low voltage ideal diode controller with monitoring. It creates a near-ideal diode using an external N-channel MOSFET. It replaces a high power Schottky diode and the associated heat sink, saving power and board area. The ideal diode function permits low loss power ORing and supply holdup applications. It regulates the forward voltage drop across the MOSFET to ensure smooth current transfer in diodeOR applications. A fast turn-on reduces the load voltage droop during supply switch-over. If the input supply fails or is shorted, a fast turn-off minimizes reverse currents. The controller also features an open MOSFET detect circuit that flags excessive voltage drop across the pass transistor in the on state. A REV pin enables reverse current, overriding the diode behaviour when desired. It is widely used in application such as redundant power supplies, supply holdup, telecom infrastructures, computer systems and servers etc.

• Input operating range is 2.9V to 18V
• Controls N-channel MOSFET
• External VCC supply current is 1.25mA typ
• Low loss replacement for power diode
• VCC undervoltage lockout hysteresis is 70mV typ
• Turn-on and turn-off time is 0.5?s max
• Status and fault outputs, hot swappable
• Operating temperature is �40°C to 85°C
• Packaging style is 12-pin plastic DFN

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