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LM25010SD Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM25010SD Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 17 page LM25010 42V, 1.0A Step-Down Switching Regulator General 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 inte- grates an N-Channel Buck Switch, and is available in ther- mally enhanced LLP-10 and TSSOP-14EP packages. The constant on-time regulation scheme requires no loop com- pensation resulting in fast load transient response and sim- plified circuit implementation. The operating frequency re- mains constant with line and load variations due to the inverse relationship between the input voltage and the on- time. The valley current limit detection is set at 1.25A. Addi- tional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage lock-out, and maximum duty cycle limiter. Features n Wide 6V to 42V Input Voltage Range n Valley Current Limiting At 1.25A n Programmable Switching Frequency Up To 1 MHz n Integrated N-Channel Buck Switch n Integrated High Voltage Bias Regulator n No Loop Compensation Required n Ultra-Fast Transient Response n Nearly Constant Operating Frequency With Line and Load Variations n Adjustable Output Voltage n 2.5V, ±2% Feedback Reference n Programmable Soft-Start n Thermal shutdown Typical Applications n Non-Isolated Telecommunications Regulator n Secondary Side Post Regulator n Power SUpply for Automotive Electronics Package n LLP-10 (4 mmx4mm) n TSSOP-14EP n Both Packages Have Exposed Thermal Pad For Improved Heat Dissipation Basic Step-Down Regulator 20172743 February 2006 © 2006 National Semiconductor Corporation DS201727 www.national.com |
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