LM25576MHX

The LM25576 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 LM25576 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 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 LM25576 ensures robustness with cycle - by - cycle current limit, short - circuit protection, thermal shutdown, 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.

Key features

• Integrated 42 - V, 170 - 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 - 20EP (Exposed Pad)