STMicroelectronics Announces 3A Single-Chip Step-Down DC/DC Converter for Home Appliances and Industrial Equipment
STMicroelectronics has released the DCP3603, a monolithic 3A step-down DC/DC converter in a small 3 x 1.6mm footprint. It simplifies design, reduces board space, and improves system reliability for applications like smart meters, home appliances, and industrial 24V systems, featuring high efficiency and a wide input voltage range from 3.3V to 36V.
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- 📰 Published: March 30, 2026 at 11:04
STMicroelectronics (NYSE: STM, hereinafter ST) has announced the DCP3603, a monolithic step-down DC/DC converter with a 3A supply capability in a compact 3 x 1.6mm footprint. This product contributes to simplifying design, reducing board area, shortening development time, and enhancing system reliability. With a wide input voltage range of 3.3V to 36V, it can be used in applications such as smart meters, home appliances, and industrial 24V equipment.
Adopting a synchronous rectification method and offering a choice of fixed switching frequencies of 1MHz or 500kHz, the DCP3603 maintains high efficiency across the entire load range, achieving a conversion efficiency of 93% at a 600mA load (12V input / 5V output). Since the power switch and compensation functions are integrated, the circuit is completed with only an inductor, bootstrap circuit, filter capacitors, and feedback resistors, minimizing the number of components.
The DCP3603 is available in two variations. Customers can choose between a product with a forced PWM mode setting for optimal performance in noise-sensitive applications, and a product with a pulse-skipping mode setting that minimizes power consumption under light loads, depending on the application. Both products implement frequency dithering to reduce noise power generated at the switching frequency and minimize total power consumption with an extremely low quiescent current of 85µA. Further power savings can be achieved by turning off the converter using the enable pin.
New designs incorporating the DCP3603 can be quickly evaluated using the dedicated evaluation board, STEVAL-3603BC1. This compact evaluation board allows for easy connection via screw terminals and headers, enabling immediate operational testing.
The DCP3603 is currently in mass production and is available in a 6-lead SOT23 package. The unit price is approximately $0.44 for orders of 1000 units.
For more details, please visit the website.
About STMicroelectronics
ST is a global semiconductor manufacturer with approximately 48,000 employees, a comprehensive supply chain, and state-of-the-art manufacturing facilities. In collaboration with over 200,000 customers and thousands of partner companies, we are developing semiconductor solutions and building ecosystems that support our customers' business creation and a sustainable society. ST's technology enables smarter mobility, more efficient power and energy management, and the widespread adoption of cloud-connected autonomous devices. ST is committed to achieving carbon neutrality for all direct and indirect emissions (Scope 1 and 2), as well as emissions from product transportation, employee travel, and commuting (focused areas of Scope 3), with a plan to use 100% renewable energy by the end of 2027. For more information, please visit the ST website (http://www.st.com).
◆ Customer Inquiries
STMicroelectronics K.K.
Analog, MEMS & Sensors Group
Shinagawa Intercity Building A, 2-15-1 Konan, Minato-ku, Tokyo 108-6017
TEL: 03-5783-8250
Adopting a synchronous rectification method and offering a choice of fixed switching frequencies of 1MHz or 500kHz, the DCP3603 maintains high efficiency across the entire load range, achieving a conversion efficiency of 93% at a 600mA load (12V input / 5V output). Since the power switch and compensation functions are integrated, the circuit is completed with only an inductor, bootstrap circuit, filter capacitors, and feedback resistors, minimizing the number of components.
The DCP3603 is available in two variations. Customers can choose between a product with a forced PWM mode setting for optimal performance in noise-sensitive applications, and a product with a pulse-skipping mode setting that minimizes power consumption under light loads, depending on the application. Both products implement frequency dithering to reduce noise power generated at the switching frequency and minimize total power consumption with an extremely low quiescent current of 85µA. Further power savings can be achieved by turning off the converter using the enable pin.
New designs incorporating the DCP3603 can be quickly evaluated using the dedicated evaluation board, STEVAL-3603BC1. This compact evaluation board allows for easy connection via screw terminals and headers, enabling immediate operational testing.
The DCP3603 is currently in mass production and is available in a 6-lead SOT23 package. The unit price is approximately $0.44 for orders of 1000 units.
For more details, please visit the website.
About STMicroelectronics
ST is a global semiconductor manufacturer with approximately 48,000 employees, a comprehensive supply chain, and state-of-the-art manufacturing facilities. In collaboration with over 200,000 customers and thousands of partner companies, we are developing semiconductor solutions and building ecosystems that support our customers' business creation and a sustainable society. ST's technology enables smarter mobility, more efficient power and energy management, and the widespread adoption of cloud-connected autonomous devices. ST is committed to achieving carbon neutrality for all direct and indirect emissions (Scope 1 and 2), as well as emissions from product transportation, employee travel, and commuting (focused areas of Scope 3), with a plan to use 100% renewable energy by the end of 2027. For more information, please visit the ST website (http://www.st.com).
◆ Customer Inquiries
STMicroelectronics K.K.
Analog, MEMS & Sensors Group
Shinagawa Intercity Building A, 2-15-1 Konan, Minato-ku, Tokyo 108-6017
TEL: 03-5783-8250