LM25017 Reference Design Circuit | Buck Regulator Application Circuit

The LM25017 is a 48V synchronous buck regulator that integrates high-side and low-side MOSFETs (metal-oxide semiconductor field effect transistors). This article mainly introduces the LM25017 features, application range, reference design circuit and circuit analysis to help you shorten the design time.

LM25017 features: wide input range from 9V to 48V; integrated 48V, high side and low side switches; constant on-time control; ultra-fast transient response

Typical application range of LM25017: industrial equipment; smart meter; telecommunication system; isolated bias power supply

LM25017 reference design application circuit:

Figure 1 Internal structure of LM25017

TheLM25017 is a 48V, 650mA synchronous step-down regulator with integrated high side and low side MOSFETs. The constant-on-time (COT) control scheme employed in the LM25017 requires no loop compensation, provides excellent transient response, and enables very low step -down ratios.

Figure 2LM25017 reference design

TheLM25017 step-down switching regulator features all the functions needed to implement a low cost, efficient, buck converter capable of up up to 650 mA to the load. This high voltage regulator contains 48V, Nchannel buck and synchronous switches, is easy to implement, And is provided in semiconductor enhanced PSOP-8 and LLP-8 packages.

LM25017 Chinese data sheet: Click to download

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