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Power Electronics Europe News
Buck-boost DC/DC converter saves power, says Rohm
The buck-boost DC/DC converter with integrated MOSFET can be used for the IoT, wearable and portable devices, where battery-driven electronic devices require smaller components for space-constrained design that also needs to minimise power consumption.


The power supply IC has a built-in low-DS(on) MOSFET with a 13µm BiCDMOS power process which, combined with the company’s X Ramp PWM Control technology for low control current circuitry, achieves what is claimed to be an industry-leading power conversion efficiency of 97% during operation (at 200mA load current). Efficiency at 100µA to 1A is 90%.


The ICs is also claimed to have the best quiescent current consumption in its class of 2.8µA. This contributes to longer operating time in compact battery-driven devices, prolonging battery life by as much as 1.53 times when compared to other conventional products during standby (100µA load current), says the company.


Target applications are coin battery operated devices, typically used in the IoT, Li-ion battery devices, including smartphones, tables and PCs and battery-driven equipment such as toys and electric toothbrushes.


The device is sampling now and OEM quantities will be available in October 2019.


An evaluation board integrating this converter is also available.

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