New compact energy-saving DC-DC converter ICs for consumer and industrial equipment

ROHM has created four new compact DC-DC step-down converter ICs ideal for consumer and industrial applications, including refrigerators, washing machines, PLCs, and inverters. The company is expanding the lineup, which includes the BD9E203FP4-Z, a 2A buck converter with a switching frequency of 350kHz.

In recent years, increasing application functionality in consumer devices and industrial equipment is driving the demand to minimise board space, resulting in a rise in the adoption rate of compact DC-DC converter ICs.

Also, as reducing standby power consumption is becoming a notable challenge, there is a growing need for DC-DC converter ICs to supply higher efficiency during light load (low power) conditions. To fulfil these demands, the company developed products that attain higher efficiency in an even smaller package than existing SOP-J8 (JEDEC standard: SOIC8 equivalent) products.

The new converter ICs deliver an output current of 1A to 3A in the compact TSOT23 package (2.8mm × 2.9mm). This decreases component area by up to 72% compared to the general SOP-J8 package (4.9mm × 6.0mm), contributing to the miniaturisation of power supply blocks. On top, adopting a flip chip on lead frame TSOT23 package design allows high-efficiency operation by eradicating bond wire resistance.

The BD9E105FP4-Z, BD9E202FP4-Z, and BD9E304FP4-LBZ also use a COT control mode during light load operation. As a result, efficiency during light load operation is enhanced over standard products, making them excellent for applications needing low standby power consumption.