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LM25007 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM25007 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 17 page FB VIN SW RTN BST L1 C2 R3 R4 C4 C3 Input LM25007 D1 R5 8 6 5 3 4 1 2 7 SHUTDOWN GND RCL VCC C5 GND 9V ± 42V RON/ SD RCL RON VOUT C1 LM25007 www.ti.com SNVS401B – JANUARY 2006 – REVISED FEBRUARY 2008 LM25007 42V, 0.5A Step-Down Switching Regulator Check for Samples: LM25007 1 FEATURES • MSOP-8 and thermally enhanced LLP packages 2 • Integrated 0.74 ohm N-Channel MOSFET switch TYPICAL APPLICATIONS • Guaranteed 0.5Amp output current • 12VDC and 24VDC distributed rail systems • Ultra-Fast Transient Response • 24VAC systems • Up to 800kHz operation • Automotive body electronics and telematics • No control loop compensation required • Industrial systems • Vin feed forward provides constant operating • HB-LED constant current source frequency • Package: • 2% accurate 2.5V feedback from -40°C to 125°C – MSOP - 8 • Highly efficient operation – LLP - 8 (4mm x 4mm) • Intelligent current limit protection • External shutdown control • Thermal shutdown 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 0.5Amp load over a 9V-42V input voltage range, this device is easy to apply and is provided in the small MSOP-8 and the thermally enhanced LLP-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 selection. An intelligent current limit is implemented in the LM25007 with forced off time that is inversely proportional to Vout thus ensuring recovery from fault conditions. The output voltage may be set from 2.5V to >30V. To improve efficiency in light load applications, the Vcc pin can be connected to an external voltage source to eliminate the drop through the internal regulator. Additional features include: thermal shutdown, Vcc under-voltage lockout, gate drive under-voltage lockout, and max duty cycle limiter. Basic Step-Down Regulator 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2008, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Podobny numer części - LM25007_14 |
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Podobny opis - LM25007_14 |
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