Simple Switcher ® Integrated Circuit Chip 75V 3A Step Down Switching LM5576MHX

Simple Switcher ® Integrated Circuit Chip 75V 3A Step Down Switching LM5576MHX

LM5576

SIMPLE SWITCHER® 75V, 3A Step-Down Switching Regulator

General Description

The LM5576 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 - 75V, the LM5576 delivers 3A of continuous output current with an integrated 170mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 500kHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5576 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM5576 is supported by the full suite of WEBENCH® On-Line design tools.

Features

■ Integrated 75V, 170mΩ N-channel MOSFET

■ Ultra-wide input voltage range from 6V to 75V

■ Adjustable output voltage as low as 1.225V

■ 1.5% feedback reference accuracy

■ Operating frequency adjustable between 50kHz and 500kHz with single resistor

■ Master or slave frequency synchronization

■ Adjustable soft-start

■ Emulated current mode control architecture

■ Wide bandwidth error amplifier

■ Built-in protection

Package

■ TSSOP-20EP (Exposed Pad)

Simplified Application Schematic

CHONGMING GROUP (HK) INT'L CO., LTD. located in Hong Kong and Shenzhen. We are an independent Distributor of Electronic Components,established in 2008. AS a growing fast company, CM GROUP is renowned for its world-class efficiency, excellent services, and extraordinary ability to supply electronic components that are hard to find and even obsolete. We have taken pride in our innovation, reliability and service, especially in the semiconductor marketplace.
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