STMicroelectronics introduces DCP3603 buck converter for compact power designs

GENEVA - STMicroelectronics in Geneva has introduced the DCP3603 monolithic buck converter designed to simplify power supply design in compact electronic systems.

The device delivers up to 3 amperes of output current from a 3 mm by 1.6 mm footprint and supports input voltages from 3.3 to 36 volts, enabling engineers to power systems such as smart meters, household appliances, and industrial 24-volt loads.

The DCP3603 uses synchronous rectification and is available with either a 1 megahertz or 500 kilohertz fixed switching frequency. The converter maintains high efficiency across a wide load range, reaching up to 93 percent at 600 milliamps with a 12-volt input and 5-volt output.

Integrated power switches and built-in compensation reduce the number of external components required. Designers need only an inductor, bootstrap and filter capacitors, and feedback resistors to complete the circuit, helping reduce printed circuit board space and simplify system design.

Two device variants are available. One is configured for forced pulse-width modulation operation to provide consistent switching behavior in noise-sensitive applications. The other supports pulse-skipping operation to reduce power consumption during light-load conditions.

Both variants incorporate frequency dithering to reduce noise energy at the switching frequency and feature a quiescent current of 85 microamps to minimize standby power consumption. An enable pin allows the converter to be shut down, further reducing system power draw.

To support evaluation and prototyping, STMicroelectronics offers the STEVAL-3603BC1 evaluation board, which enables engineers to test the DCP3603 in new designs. The board includes screw terminals and headers for rapid setup and power-up during development.

For more information, please visit https://www.st.com.