Convertors are optimised for portable applications

An ON Semiconductor product story

Edited by the Electronicstalk editorial team Mar 10, 2006

The NCP1521 and NCP1522 are 600mA DC/DC step-down convertors optimised for portable applications powered from one-cell Li-ion or three-cell alkaline/NiCd/NiMH batteries.

Available now from ON Semiconductor, the NCP1521 and NCP1522 are 600mA DC/DC step-down convertors optimised for portable applications powered from one-cell Li-ion or three-cell alkaline/NiCd/NiMH batteries.

The devices include integrated soft-start, cycle-by-cycle current limiting and thermal shutdown protection.

Automatic switching between PWM and PFM modes provides improved system efficiency.

NCP1521 switches at 1.5MHz and delivers up to 96% efficiency.

The NCP1522 switches at 3.0MHz, and delivers up to 93% efficiency.

These high frequencies allow use of lower value inductors and output capacitors, which results in a physically smaller subsystem solution.

Both devices are currently in production, and expand ON Semiconductor's extensive DC/DC switching convertor portfolio.

They are offered in space-efficient 3 x 3mm TSOP-5 packages.

NCP1521 is priced at $0.60 per unit in 3000-unit quantities.

NCP1522 is priced at $0.65 per unit in 3000-unit quantities.

Samples may be ordered from the ON Semiconductor website.