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.