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LM25574Q Fiches technique(PDF) 1 Page - Texas Instruments |
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LM25574Q Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 30 page LM25574 www.ti.com SNVS483F – JANUARY 2007 – REVISED FEBRUARY 2009 LM25574/LM25574Q SIMPLE SWITCHER® 42V, 0.5A Step-Down Switching Regulator Check for Samples: LM25574 1 FEATURES • Master or slave frequency synchronization • Adjustable soft-start 23 • LM25574Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified ( −40°C to + • Emulated current mode control architecture 125°C operating junction temperature) • Wide bandwidth error amplifier • Integrated 42V, 750m Ω N-channel MOSFET • Built-in protection • Ultra-wide input voltage range from 6V to 42V • Automotive Grade product datasheet that is • Adjustable output voltage as low as 1.225V AEC-Q100 grade 0 qualified is available upon request. • 1.5% feedback reference accuracy – ( −40°C to + 150°C operating junction • Operating frequency adjustable between temperature) 50kHz and 1MHz with single resistor DESCRIPTION The LM25574 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 - 42V, the LM25574 delivers 0.5A of continuous output current with an integrated 750m Ω N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 1MHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM25574 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a TSSOP-16 package. The LM25574 is supported by the full suite of WEBENCH® On- Line design tools. Package • TSSOP-16 Applications • Automotive • Industrial 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 WEBENCH is a registered trademark of Texas Instruments. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2007–2009, 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. |
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