LM25010 Datasheet | National Semiconductor

Description The LM25010 features all the functions needed to implement a low cost, efficient, buck regulator capable of supplying in excess of 1A load current. This high voltage regulator integrates an N-Channel Buck Switch, and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. The constant on-time regulation scheme requires no loop pensation resulting in fast load transient response and simplified circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the ontime. The valley current limit detection is set at 1.25A. Additional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage lock-out, and maximum duty cycle limiter. Features n n n n n n n n n n n n Wide 6V to 42V Input Voltage Range Valley Current Limiting At 1.25A Programmable Switching Frequency Up To 1 MHz Integrated N-Channel Buck Switch Integrated High Voltage Bias Regulator No Loop pensation Required Ultra-Fast Transient Response Nearly Constant Operating Frequency With Line and Load Variations Adjustable Output Voltage 2.5V, ± 2% Feedback Reference Programmable Soft-Start Thermal shutdown Typical Applications n Non-Isolated Telemunications Regulator n Secondary Side Post Regulator n Power SUpply for Automotive Electronics Package n LLP-10 (4 mm x 4 mm) n TSSOP-14EP n Both Packages Have Exposed Thermal Pad For Improved Heat Dissipation Basic Step-Down Regulator © 2006 National Semiconductor Corporation DS201727 .national. Connection Diagrams Ordering Information Order Number LM25010SD LM25010SDX LM25010MH LM25010MHX Package Type LLP-10 (4x4) LLP-10 (4x4) TSSOP-14EP TSSOP-14EP NSC Package Drawing SDC10A SDC10A MXA14A MXA14A Junction Temperature Range - 40˚C to + 125˚C - 40˚C to + 125˚C - 40˚C to + 125˚C - 40˚C to + 125˚C Supplied As 1000 Units on Tape and Reel 4500 Units on Tape and Reel 94 Units in Rail 2500...