Power Electronics
Programmable Load Switch Improves System Power Reliability

Programmable Load Switch Improves System Power Reliability

With fully adjustable output slew rates, the 5V dual-channel AP22966 load switch from Diodes Incorporated provides simple and cost-effective soft-start functionality for improving 3.3V and 5V system power reliability in notebook, tablet and datacom products.

The device's two N-channel MOSFET outputs can be independently controlled, with slew rates set via ground-connected external capacitors on its soft-start inputs.  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 load switch operates over a wide 0.8V to 5.5V input voltage range.  This device is also characterized 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 priced at $0.085USD each in 1,000 piece quantities.

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