Product News

RMJ3603/RMJ3603A is a synchronous buck DC/DC micro power module chip that integrates a synchronous buck controller, power MOSFET, power inductor, and other necessary passive components. It supports a wide input voltage range from 4V to 36V and provides an output current capability of 3A continuous and 4A peak.

RMJ3603/RMJ3603A adopts LGA-16 (4mmx6 mmx1.9mm) packaging, with minimal peripheral components. It can achieve efficient operation under both heavy and light load conditions and features comprehensive protection functions: UVP, OVP, OCP, SCP, OTP. It is an ideal solution for space-constrained applications and noise-sensitive systems.

Core technological advantages

• Wide input voltage range: 4V~36V;

• Continuous output current capacity: 3A;

• Adjustable output voltage range: 0.8V~0.95*VIN;

• Minimal peripheral components, simple PCB design;

• With enable pin (EN) and output power status indication (PG);

• Internal soft start;

• Comprehensive protection functions: input under-voltage protection (UVP), output over-voltage protection (OVP), over-current protection (OCP), short-circuit protection (SCP), and over-temperature protection (OTP);

• Small size: LGA-16 (4mmx6mmx1.9mm), suitable for designs with limited space;

• Design guidelines and Demo boards, suitable for rapid verification and design with limited time.

Typical Applications

Efficiency curve

DEMO board：

Product selection and ordering consultation

RMJ3603 operates in the pulse skip mode (PSM), while RMJ3603A operates in the forced continuous conduction mode (FCCM). The switching frequency is adjustable from 1.2MHz to 2.5MHz, allowing users to make corresponding choices according to their needs.

For inquiries related to product ordering and technical issues, please call: 029-88827769/15626011985. Our technical team will respond promptly and provide you with efficient and reliable solutions.