SGM25730

The SGM25730, an ideal diode controller used as an ideal diode rectifier with external NMOS, offers low-loss reverse polarity protection, which has a mere 20mV forward voltage drop. Designed for automotive 12V power systems, this solution effectively addresses cold crank challenges through its extended operational capability down to 3.2V input voltage. The controller's minimal voltage loss and robust protection features make it particularly advantageous for vehicle power management applications requiring high reliability under extreme conditions. 

Controlling the GATE of MOSFET, the device regulates the 20mV forward voltage drop. During a reverse current event, the SGM25730 ensures smooth turn-off of the MOSFET, effectively preventing any steady-state reverse current. With a rapid reverse current blocking response time of less than 1.1μs, the device is well-suited for applications requiring output voltage hold-up during ISO7637 pulse tests, as well as during input micro-short and power fail scenarios. 

The SGM25730 integrates the function of VDS clamp, which enables TVS-less input polarity protection, typically saving 60% PCB space in constrained automotive systems. 

This controller incorporates a charge pump gate driver for an external NMOS. Its high voltage rating simplifies system designs for automotive EMC transient interference standard ISO7637. When the enable pin is low, the controller is deactivated and consumes approximately 1μA of current. 

The SGM25730 is available in a Green TSOT-23-8 package.