LM25007

LM25007 www.ti.com SNVS401C – JANUARY 2006 – REVISED FEBRUARY 2013 LM25007 42V, 0.5A Step-Down Switching Regulator Check for Samples: LM25007 FEATURES 1 2 Integrated 0.74Ω N-Channel MOSFET Switch Guaranteed 0.5A Output Current Ultra-Fast Transient Response Up to 800kHz Operation No Control Loop Compensation Required Vin Feed Forward Provides Constant Operating Frequency 2% Accurate 2.5V Feedback from -40°C to 125°C Highly Efficient Operation Intelligent Current Limit Protection External Shutdown Control Thermal Shutdown VSSOP and Thermally Enhanced WSON Packages TYPICAL APPLICATIONS 12VDC and 24VDC Distributed Rail Systems 24VAC Systems Automotive Body Electronics and Telematics Industrial Systems HB-LED Constant Current Source Package: – VSSOP-8 – WSON-8 (4mm x 4mm) DESCRIPTION The LM25007 is a monolithic step-down switching regulator featuring all of the functions needed to implement a low cost, efficient, power supply. Capable of driving a 0.5A load over a 9V-42V input voltage range, this device is easy to apply and is provided in the small VSSOP-8 and the thermally enhanced WSON-8 packages. Ultra-fast transient response is achieved through the use of a constant on-time architecture with Vin feed forward. This feature provides an almost constant operating frequency over load and input voltage variations. The operating frequency can be adjusted with a single resistor. This architecture is easy to use and tolerant of component selectio...