Micro DC/DC converters save space and reduce development time

Designed for negative power stabilisation circuits for devices with a varying input voltage, the XCL301 coil-integrated micro DC/DC converter series is available from Torex Semiconductor.

The XCL301 series converters support -3.3V negative voltage output. An inverted output DC/DC circuit can be configured by simply adding two external ceramic capacitors and a Schottky diode, explains Torex, contributing to saving of board space and a shorter development time.

An integrated coil simplifies the board layout and makes it possible to minimise unwanted radiation noise and circuit operation trouble. For the package size, the small CL‐2025‐02 (2.5 x 2.0 x 1.0mm) is used.

The operation voltage range is 2.7 to 5.5V, and the output voltage is fixed at ‐3.3V (±2.0 per cent). The control method is the auto switching control of PFM / fixed off time PWM. High‐efficiency is obtained across the full load range from light loads to heavy loads by switching from fixed off time PWM control to PFM control when the load is light, adds Torex.

The converters can be used for devices that require high efficiency at light loads, and devices for which battery life is a concern.

Torex Semiconductor supplies CMOS power management ICs targeted at battery powered and energy efficient applications. The company specialises in CMOS analogue technology, LDO voltage regulators, voltage detectors and DC/DC converters.

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http://www.torexsemi.com

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