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LM27342Q Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM27342Q
Spiegazioni elettronici  2 MHz 1.5A/2A Wide Input Range Step-Down DC-DC Regulator with Frequency Synchronization
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LM27342Q Scheda tecnica(HTML) 1 Page - Texas Instruments

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LM27341, LM27342, LM27341Q, LM27342Q
www.ti.com
SNVS497D – NOVEMBER 2008 – REVISED FEBRUARY 2010
LM27341/LM27342/LM27341Q/LM27342Q 2 MHz 1.5A/2A Wide Input Range Step-Down DC-
DC Regulator with Frequency Synchronization
Check for Samples: LM27341, LM27342, LM27341Q, LM27342Q
1
FEATURES
DESCRIPTION
The
LM27341
and
LM27342
regulators
are
2
Space Saving 3 x 3 mm 10-Pin SON and
monolithic, high frequency, PWM step-down DC-DC
MSOP-PowerPad Packages
converters
in
10-pin
SON
and
10-pin
MSOP-
Wide Input Voltage Range: 3V to 20V
PowerPad packages. They contain all the active
Wide Output Voltage Range: 1V to 18V
functions to provide local DC-DC conversion with fast
transient response and accurate regulation in the
LM27341 Delivers 1.5A Maximum Output
smallest possible PCB area.
Current
With
a
minimum
of
external
components
the
LM27342 Delivers 2A Maximum Output Current
LM27341 and LM27342 are easy to use. The ability
High Switching Frequency: 2 MHz
to drive 1.5A or 2A loads respectively, with an internal
Frequency Synchronization: 1.00 MHz < fSW <
150 m
Ω NMOS switch results in the best power
2.35 MHz
density available. The world-class control circuitry
allows for on-times as low as 65 ns, thus supporting
150 m
Ω NMOS Switch with Internal Bootstrap
exceptionally high frequency conversion. Switching
Supply
frequency
is
internally
set
to
2
MHz
and
70 nA Shutdown Current
synchronizable from 1 to 2.35 MHz, which allows the
Internal Voltage Reference Accuracy of 1%
use of extremely small surface mount inductors and
chip capacitors. Even though the operating frequency
Peak Current-Mode, PWM Operation
is very high, efficiencies up to 90% are easy to
Thermal Shutdown
achieve. External shutdown is included featuring an
LM27341Q and LM27342Q are AEC-Q100
ultra-low shutdown current of 70 nA. The LM27341
Grade 1 Qualified and are Manufactured on an
and LM27342 utilize peak current-mode control and
Automotive Grade Flow
internal compensation to provide high-performance
regulation over a wide range of operating conditions.
Additional features include internal soft-start circuitry
APPLICATIONS
to reduce inrush current, pulse-by-pulse current limit,
Local 12V to Vcore Step-Down Converters
thermal
shutdown,
and
output
over-voltage
Radio Power Supply
protection.
Core Power in HDDs
Set-Top Boxes
Automotive
USB Powered Devices
DSL Modems
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 © 2008–2010, 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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