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LM25011 датащи(PDF) 1 Page - Texas Instruments |
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LM25011 датащи(HTML) 1 Page - Texas Instruments |
1 / 26 page LM25011, LM25011-Q1 www.ti.com SNVS617F – MAY 2009 – REVISED JANUARY 2011 LM25011, LM25011Q, LM25011A, LM25011AQ 42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit Check for Samples: LM25011, LM25011-Q1 1 FEATURES 2 • LM25011Q is an Automotive Grade product • COT topology features: that is AEC-Q100 grade 1 qualified (-40°C to – Switching frequency remains nearly +125°C operating junction temperature) constant with load current and input • LM25011A allows low dropout operation at voltage variations high switching frequency – Ultra-fast transient response • Input operating voltage range: 6V to 42V – No loop compensation required • Absolute maximum input rating: 45V – Stable operation with ceramic output • Integrated 2A N-Channel Buck Switch capacitors • Adjustable current limit allows for smaller – Allows for smaller output capacitor and inductor current sense resistor • Adjustable output voltage from 2.51V • Adjustable Soft-Start timing • Minimum ripple voltage at VOUT • Thermal shutdown • Power Good output • Precision 2% feedback reference • Switching frequency adjustable to 2 MHz • Package – MSOP-10EP DESCRIPTION The LM25011 Constant On-time Step-Down Switching Regulator features all the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying up to 2A of load current. This high voltage regulator contains an N-Channel Buck switch, a startup regulator, current limit detection, and internal ripple control. The constant on-time regulation principle requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load. The adjustable valley current limit detection results in a smooth transition from constant voltage to constant current mode when current limit is reached, without the use of current limit foldback. The PGD output indicates the output voltage has increased to within 5% of the expected regulation value. Additional features include: Low output ripple, VIN under-voltage lock-out, adjustable soft-start timing, thermal shutdown, gate drive pre-charge, gate drive under- voltage lock-out, and maximum duty cycle limit. The LM25011A has a shorter minimum off-time than the LM25011, which allows for higher frequency operation at low input voltages. 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 © 2009–2011, 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. |
Аналогичный номер детали - LM25011_14 |
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Аналогичное описание - LM25011_14 |
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