NS LM25576MHX/J7001799

Overview

The LM25576MHX is an easy to use buck regulator which allows design engineers to design andoptimize a robust power supply using a minimum set of components. Operating with an input voltagerange of 6 V to 42 V, the LM25576MHX delivers 3 A of continuous output current with an integrated170-m N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture whichprovides inherent line regulation, tight load transient response, and ease of loop compensationwithout the usual limitation of low-duty cycles associated with current mode regulators. Theoperating frequency is adjustable from 50 kHz to 1 MHz to allow optimization of size andefficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557xfamily to self-synchronize or to synchronize to an external clock. The LM25576MHX ensures robustnesswith cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remoteshut-down. The device is available in a power enhanced HTSSOP-20 package featuring an exposed dieattach pad for thermal dissipation. The LM25576MHX is supported by the full suite ofWEBENCH On-Line design tools.

Features