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ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

Compact size reduces component area by 72%, contributing to smaller power supplies in consumer and industrial equipment.

ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

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

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


ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

Furthermore, as reducing standby power consumption is becoming a significant challenge, there is a growing need for DC-DC converter ICs to deliver higher efficiency during light load (low power) conditions. To meet these demands, ROHM developed products that achieve 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 reduces component area by up to 72% compared to the general SOP-J8 package (4.9mm × 6.0mm), contributing to the miniaturization of power supply blocks. On top, adopting a flip chip on lead frame TSOT23 package design enables high-efficiency operation by eliminating bond wire resistance.


ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

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

Going forward, ROHM will continue to focus on developing products that leverage analog design technologies, contributing to greater miniaturization and energy efficiency in consumer and industrial equipment applications.


ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

TSOT23 Package Product Lineup

ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

Application Examples

  • 3.3V/5V/12V/24V power supply applications
  • Consumer Appliances: Refrigerators, washing machines,air conditioners, etc.
  • Industrial Equipment: PLCs (Programmable Logic Controllers), inverters, AC servos, etc.


ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

Product Information
In addition to the ICs, evaluation boards together with various support tools are available that enable immediate evaluation during application design.

ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

ROHM’s New Energy-Saving DC-DC Converter ICs Offered in the TSOT23 Package

For more Information.

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