Power

Soft-start functionality improves power reliability

25th November 2014
Nat Bowers

Providing simple and cost-effective soft-start functionality to improve 3.3 and 5V system power reliability in notebooks, tablets and datacomms, the 5V dual-channel AP22966 load switch has been announced by Diodes Incorporated. With fully adjustable output slew rates set via ground-connected external capacitors on its soft-start inputs, the device’s two N-channel MOSFET outputs can be independently controlled.

A logic-high signal applied to the channel-enable pins produces output voltages that increase gradually and linearly, thereby limiting circuit inrush current. Additionally, an increase in power density is achieved with the AP22966’s use of the small form factor, exposed-pad DFN3020 package, which offers a PCB footprint of just 6mm2.

The AP22966 operates over a wide input voltage range from 0.8 to 5.5V. The load switch is characterised by very low quiescent currents (60µA for both channels and 45µA for single-channel), making it well-suited for battery-backed distributed power systems where energy efficiency is paramount.

The AP22966 dual-channel programmable load switch from Diodes Incorporated is available for $0.085 each in 1,000 unit quantities.

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