LTC4371IMS#PBF

LTC4371 is a two-input negative voltage ideal diode-OR controller that drives external N-channel MOSFETs as a low dissipation alternative to Schottky diodes in high power -48V systems. Low power dissipation and voltage loss eliminates the need for heatsinks and reduces PC board area. Power sources can be easily ORed together to increase total system power and reliability. It tolerates ±300V transients such as those experienced during lightning-induced surges and input supply short-circuit events. The internal shunt regulator and low 350μA quiescent current allow the use of a large value dropping resistor to protect the supply pin against high voltage transients, while the high impedance drain pins can be similarly protected by high value series resistors without compromising diode operation. It is used in applications such as -48V telecom power, advancedTCA systems, network routers and switches, computer systems and servers etc.

• Low 15mV forward voltage minimizes dissipation
• Gate turn-Off time in fault condition is 220ns maximum at (∆VSD = 0.1V step to -0.4V)
• Shunt regulated for high voltage applications
• Open fuse and MOSFET monitor
• Input supply range is 4.5V to 16V
• Quiescent current is 300µA typical at (∆VSD = ±0.1V, t TA = 25°C, IZ = 50µA)
• 4.5V minimum operation
• High impedance drain pins: <lt/>10μA leakage
• Operating ambient temperature is -40°C to 85°C
• Package style is 10-lead plastic MSOP

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