1 Features

1• Integrated 42-V, 330-mΩ N-Channel MOSFET

• Ultra-Wide Input Voltage Range From 6 V to 42 V

• Adjustable Output Voltage as Low as 1.225 V

• 1.5% Feedback Reference Accuracy

• Operating Frequency Adjustable Between 50 kHz

and 1 MHz With Single Resistor

• Master or Slave Frequency Synchronization

• Adjustable Soft-Start

• Emulated Current Mode Control Architecture

• Wide Bandwidth Error Amplifier

• Built-In Protection

• HTSSOP-16EP (Exposed Pad)

• Create a Custom Design Using the LM25575 With

the WEBENCH® Power Designer

2 Applications

• Industrial

3 Description

The LM25575 is an easy to use 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 V to 42 V, the LM25575 delivers 1.5-A of

continuous output current with an integrated 330-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 1-MHz 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 LM25575

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-16 package featuring an

exposed die attach pad for thermal dissipation. The

LM25575 is supported by the full suite of

WEBENCH® On-Line design tools.