1 Features
1• Qualified for Automotive Applications
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
• 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-16 EP (Exposed Pad)
• Create a Custom Design Using the LM25575-Q1
With the WEBENCH® Power Designer

2 Applications
• Industrial

3 Description
The LM25575-Q1 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-Q1 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-Q1
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-Q1 is supported by the full suite of
WEBENCH® On-Line design tools.