1 Features

1• LM5576-Q1 is an Automotive Grade Product that

is AEC-Q100 grade 1 Qualified (−40°C to + 125°C

Operating Junction Temperature) and AEC-Q100

Grade 0 Qualified (−40°C to + 150°C Operating

Junction Temperature)

• Integrated 75 V, 170 mΩ N-channel MOSFET

• Ultra-Wide Input Voltage Range from 6 V to 75 V

• Adjustable Output Voltage as Low as 1.225 V

• 1.5% (Q1) and 1.65% (Q0) Feedback Reference

Accuracy

• Operating Frequency Adjustable Between 50 kHz

and 500 kHz with Single Resistor

• Master or Slave Frequency Synchronization

• Adjustable Soft-Start

• Emulated Current Mode Control Architecture

• Wide Bandwidth Error Amplifier

• Built-in Protection

• HTSSOP-20EP (Exposed Pad)

2 Applications

• Automotive

• Industrial

3 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 - 75 V, the LM5576 delivers 3 A of

continuous output current with an integrated 170 mΩ

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 50 kHz to 500 kHz to allow

optimization of size and efficiency. To reduce EMI, a

frequency synchronization pin allows multiple ICs

from the LM(2)557x family to self-synchronize or to

synchronize to an external clock. The LM5576

ensures 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 HTSSOP-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.