R2J20751NP

The Renesas R2J20751NP is a peak current mode synchronous buck controller designed for point-of-load (POL) applications. This all-in-one SiP (System in Package) integrates a high-side MOS FET, low-side MOS FET, and PWM controller into a single QFN package, offering high efficiency and space savings.

Key electrical specifications include a large average output current capability of 25A, a wide input voltage range from 3.3V to 27V, and a programmable switching frequency that can be set anywhere between 200kHz and 1MHz. It features a 0.6V reference voltage with an accuracy of 2% and a current sensing error of 1.5A maximum at a 15A load current. The device also incorporates a built-in boot switch, eliminating the need for an external SBD.

Designed for ease of implementation, the R2J20751NP utilizes a simple peak-current mode topology that ensures stable operation in a closed power loop. This topology can be extended for parallel synchronized operation with current sharing and multi-phase configurations. The controller includes features such as ON/OFF control, hiccup operation under overload conditions, tracking function, power good indication, over voltage protection (OVP), and pre-OVP function.

The R2J20751NP is housed in a thin and small QFN40 package measuring 6mm x 6mm, making it suitable for space-constrained designs. Its robust feature set and integrated components make it ideal for applications such as motherboards and servers.