Dual DC/DC converter maximises portable device battery life

29th October 2014
Posted By : Siobhan O'Gorman
Dual DC/DC converter maximises portable device battery life

Designed to meet the demands of wireless and DSL modem applications, the PAM2322AGEAR dual PWM step-down DC/DC converter has been released by Diodes Incorporated. Maximising portable device battery life, the device’s pulse-skipping mode enables a reduction in quiescent current under light load operation.

Allowing systems to operate even at the lowest voltage supply, the converter provides a 100% duty cycle, which saves power. Supporting the use of single Li+/ Li polymer cells, multiple alkaline/NiMH cells and USB power supplies, the device has an input voltage range from 2.7 to 5.5V.

A 1A, 1.8V fixed voltage output and a 2A, adjustable (0.9V to VIN) voltage output are offered with the PAM2322AGEAR converter, each with an independent active-high channel enable pin. Minimising the size and quantity of external components needed, the device combines an internal power switch and synchronous rectifier on each output with a high operating frequency of 1.2MHz.

Protection features, including under-voltage lockout, soft-start, thermal shutdown and heat-reducing, hiccup mode short-circuit protection, are provided with the PAM2322AGEAR converter. Offered in a 17-pad W-FLGA2050 package measuring 2.5x2.00mm, the converter is priced at $0.35 each and sold in 1,000 unit quantities.

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