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LM2672M-3.3 датащи(PDF) 1 Page - Texas Instruments

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номер детали LM2672M-3.3
подробное описание детали  LM2672 SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage
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LM2672M-3.3 датащи(HTML) 1 Page - Texas Instruments

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LM2672
www.ti.com
SNVS136K – SEPTEMBER 1998 – REVISED APRIL 2013
LM2672 SIMPLE SWITCHER® Power Converter High Efficiency 1A Step-Down Voltage
Regulator with Features
Check for Samples: LM2672
1
FEATURES
DESCRIPTION
The LM2672 series of regulators are monolithic
234
Efficiency up to 96%
integrated circuits built with a LMDMOS process.
Available in SOIC-8 and 8-pin PDIP Packages
These regulators provide all the active functions for a
Computer Design Software LM267X Made
step-down (buck) switching regulator, capable of
Simple Version 6.0
driving a 1A load current with excellent line and load
regulation. These devices are available in fixed output
Simple and Easy to Design with
voltages of 3.3V, 5.0V, 12V, and an adjustable output
Requires only 5 External Components
version.
Uses Readily Available Standard Inductors
Requiring
a
minimum
number
of
external
3.3V, 5.0V, 12V, and Adjustable Output
components, these regulators are simple to use and
Versions
include patented internal frequency compensation
(Patent
Nos.
5,382,918
and
5,514,947),
fixed
Adjustable Version Output Voltage Range:
frequency oscillator, external shutdown, soft-start,
1.21V to 37V
and frequency synchronization.
±1.5% Max Output Voltage Tolerance Over
Line and Load Conditions
The LM2672 series operates at a switching frequency
of
260
kHz,
thus
allowing
smaller
sized
filter
Specified 1A Output Load Current
components than what would be needed with lower
0.25
Ω DMOS Output Switch
frequency switching regulators. Because of its very
Wide Input Voltage Range: 8V to 40V
high efficiency (>90%), the copper traces on the
printed circuit board are the only heat sinking needed.
260 kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby
A family of standard inductors for use with the
LM2672
are
available
from
several
different
Mode
manufacturers. This feature greatly simplifies the
Soft-Start and Frequency Synchronization
design of switch-mode power supplies using these
Thermal Shutdown and Current Limit
advanced ICs. Also included in the datasheet are
Protection
selector guides for diodes and capacitors designed to
work in switch-mode power supplies.
TYPICAL APPLICATIONS
Other features include a ensured ±1.5% tolerance on
Simple High Efficiency (>90%) Step-Down
output voltage within specified input voltages and
(Buck) Regulator
output load conditions, and ±10% on the oscillator
frequency. External shutdown is included, featuring
Efficient Pre-Regulator for Linear Regulators
typically 50
μA stand-by current. The output switch
includes current limiting, as well as thermal shutdown
for full protection under fault conditions.
To simplify the LM2672 buck regulator design
procedure, there exists computer design software,
LM267X Made Simple version 6.0.
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
SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments.
3
Windows is a registered trademark of Microsoft Corporation.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2013, 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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