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LM2674N-5.0 Datasheet(PDF) 1 Page - Texas Instruments

Part # LM2674N-5.0
Description  LM2674 SIMPLE SWITCHER짰 Power Converter High Efficiency 500 mA Step-Down Voltage Regulator
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM2674N-5.0 Datasheet(HTML) 1 Page - Texas Instruments

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LM2674
www.ti.com
SNVS007F – SEPTEMBER 1998 – REVISED APRIL 2013
LM2674 SIMPLE SWITCHER® Power Converter High Efficiency
500 mA Step-Down Voltage Regulator
Check for Samples: LM2674
1
FEATURES
DESCRIPTION
The LM2674 series of regulators are monolithic
234
Efficiency up to 96%
integrated circuits built with a LMDMOS process.
Available in SOIC-8, 8-Pin PDIP and WSON
These regulators provide all the active functions for a
Packages
step-down (buck) switching regulator, capable of
Computer Design Software LM267X Made
driving a 500 mA load current with excellent line and
load regulation. These devices are available in fixed
Simple (Version 6.0)
output voltages of 3.3V, 5.0V, 12V, and an adjustable
Simple and Easy to Design With
output version.
Requires Only 5 External Components
Requiring
a
minimum
number
of
external
Uses Readily Available Standard Inductors
components, these regulators are simple to use and
3.3V, 5.0V, 12V, and Adjustable Output
include patented internal frequency compensation
Versions
(Patent Nos. 5,382,918 and 5,514,947) and a fixed
frequency oscillator.
Adjustable Version Output Voltage Range:
1.21V to 37V
The LM2674 series operates at a switching frequency
±1.5% Max Output Voltage Tolerance Over
of
260
kHz,
thus
allowing
smaller
sized
filter
components than what would be needed with lower
Line and Load Conditions
frequency switching regulators. Because of its very
Guaranteed 500mA Output Load Current
high efficiency (>90%), the copper traces on the
0.25
Ω DMOS Output Switch
printed circuit board are the only heat sinking needed.
Wide Input Voltage Range: 8V to 40V
A family of standard inductors for use with the
260 kHz Fixed Frequency Internal Oscillator
LM2674
are
available
from
several
different
manufacturers. This feature greatly simplifies the
TTL Shutdown Capability, Low Power Standby
design of switch-mode power supplies using these
Mode
advanced ICs. Also included in the datasheet are
Thermal Shutdown and Current Limit
selector guides for diodes and capacitors designed to
Protection
work in switch-mode power supplies.
TYPICAL APPLICATIONS
Simple High Efficiency (>90%) Step-Down
(Buck) Regulator
Efficient Pre-Regulator for Linear Regulators
Positive-to-Negative Converter
Typical Application
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 is a registered trademark 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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