SIMPLE SWITCHER OEM I/C

The LM25576 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 - 42V, the LM25576 delivers 3A of continuous output current with an integrated 170m? 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 1MHz 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 LM25576 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 LM25576 is supported by the full suite of WEBENCH On-Line design tools.

LM25576-Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (-40°C to + 125°C Operating Junction Temperature)

Integrated 42V, 170m? N-channel MOSFET

Ultra-Wide Input Voltage Range from 6V to 42V

Adjustable Output Voltage as Low as 1.225V

1.5% Feedback Reference Accuracy

Operating Frequency Adjustable Between 50kHz and 1MHz with Single Resistor

Master or Slave Frequency Synchronization

Adjustable Soft-Start

Emulated Current Mode Control Architecture

Wide Bandwidth Error Amplifier

Built-in Protection

Automotive Grade Product Datasheet that is AEC-Q100 Grade 0 Qualified is Available Upon Request.

• (-40°C to + 150°C Operating Junction Temperature)

HTSSOP-20EP (Exposed Pad)