Electronic Components Datasheet Search
  English  ▼

Delete All


Preview PDF Download HTML

LM2672 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM2672
Description  SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
Download  25 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2672 Datasheet(HTML) 1 Page - National Semiconductor (TI)

  LM2672 Datasheet HTML 1Page - National Semiconductor (TI) LM2672 Datasheet HTML 2Page - National Semiconductor (TI) LM2672 Datasheet HTML 3Page - National Semiconductor (TI) LM2672 Datasheet HTML 4Page - National Semiconductor (TI) LM2672 Datasheet HTML 5Page - National Semiconductor (TI) LM2672 Datasheet HTML 6Page - National Semiconductor (TI) LM2672 Datasheet HTML 7Page - National Semiconductor (TI) LM2672 Datasheet HTML 8Page - National Semiconductor (TI) LM2672 Datasheet HTML 9Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 1 / 25 page
background image
SIMPLE SWITCHER® Power Converter High Efficiency
1A Step-Down Voltage Regulator with Features
General Description
The LM2672 series of regulators are monolithic integrated
circuits built with a LMDMOS process. These regulators
provide all the active functions for a step-down (buck)
switching regulator, capable of driving a 1A load current with
excellent line and load regulation. These devices are avail-
able in fixed output voltages of 3.3V, 5.0V, 12V, and an
adjustable output version.
Requiring a minimum number of external components, these
regulators are simple to use and include patented internal
frequency compensation (Patent Nos. 5,382,918 and
5,514,947), fixed frequency oscillator, external shutdown,
soft-start, and frequency synchronization.
The LM2672 series operates at a switching frequency of
260 kHz, thus allowing smaller sized filter components than
what would be needed with lower frequency switching regu-
lators. Because of its very high efficiency (>90%), the cop-
per traces on the printed circuit board are the only heat
sinking needed.
A family of standard inductors for use with the LM2672 are
available from several different manufacturers. This feature
greatly simplifies the design of switch-mode power supplies
using these advanced ICs. Also included in the datasheet
are selector guides for diodes and capacitors designed to
work in switch-mode power supplies.
Other features include a guaranteed ±1.5% tolerance on
output voltage within specified input voltages and output
load conditions, and ±10% on the oscillator frequency. Ex-
ternal shutdown is included, featuring typically 50 µA
stand-by current. The output switch includes current limiting,
as well as thermal shutdown for full protection under fault
To simplify the LM2672 buck regulator design procedure,
there exists computer design software, LM267X Made
Simple version 1.0.
Efficiency up to 96%
Available in SO-8 and 8-pin DIP packages
Computer Design Software LM267X Made Simple
version 1.0
Simple and easy to design with
Requires only 5 external components
Uses readily available standard inductors
3.3V, 5.0V, 12V, and adjustable output versions
Adjustable version output voltage range: 1.21V to 37V
n ±
1.5% max output voltage tolerance over line and load
Guaranteed 1A output load current
Ω DMOS Output Switch
Wide input voltage range: 8V to 40V
260 kHz fixed frequency internal oscillator
TTL shutdown capability, low power standby mode
Soft-start and frequency synchronization
Thermal shutdown and current limit protection
Typical Applications
Simple High Efficiency (>90%) Step-Down (Buck)
Efficient Pre-Regulator for Linear Regulators
Typical Application (Fixed Output Voltage
SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation.
Windows® is a registered trademark of Microsoft Corporation.
February 2005
© 2005 National Semiconductor Corporation

Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25 

Datasheet Download

Go To PDF Page

Link URL

Privacy Policy
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com

Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn