4A, low resistance load switch with controlled turn-on

March 21, 2014 // By Graham Prophet
Advanced Power Electronics adds a small load switch with controlled turn on and very low on-resistance.

The APE8937-HF-3 load switch contains one N-channel MOSFET that can operate over a wide input voltage range from 0.8V to 5.5V and support a maximum continuous current of up to 4A. On-resistance is 22 mΩ from V IN=1.8V to V IN=5.0V. The switch is controlled by an on/off input, and is capable of interfacing directly with control signals as low as 0.8V.

Additional features include a 300Ω on-chip load resistor for output quick discharge when the switch is turned off. For power-sequencing, the rise time is adjustable by an external ceramic capacitor on the CT pin, which also reduces inrush current.

The APE8937-HF-3 switch is available in a 2 x 2 mm 8-pin DFN package with thermal pad.

APEC; www.a-powerusa.com/docs/APE8937-3.pdf