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LM25574 Scheda tecnica(PDF) 1 Page - Texas Instruments

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Il numero della parte LM25574
Spiegazioni elettronici  SIMPLE SWITCHER짰 42V, 0.5A Step-Down Switching Regulator
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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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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