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LM2672M-12 Datasheet Preview

LM2672M-12 Datasheet

High Efficiency 1-A Step-Down Voltage Regulator

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LM2672
SNVS136L – SEPTEMBER 1998 – REVISED JUNE 2016
LM2672 SIMPLE SWITCHER® Power Converter High Efficiency 1-A Step-Down Voltage
Regulator with Features
1 Features
1 Efficiency up to 96%
• Available in 8-Pin SOIC and PDIP Packages
• Requires only 5 External Components
• 3.3-V, 5-V, 12-V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range: 1.21 V
to 37 V
• ±1.5% Maximum Output Voltage Tolerance Over
Line and Load Conditions
• Specified 1-A Output Load Current
• Wide Input Voltage Range: 8 V to 40 V
• 260-kHz Fixed Frequency Internal Oscillator
• TTL Shutdown Capability, Low Power Standby
Mode
• Soft-Start and Frequency Synchronization
• Thermal Shutdown and Current Limit Protection
2 Applications
• Simple High Efficiency (>90%) Step-Down (Buck)
Regulator
• Efficient Preregulator for Linear Regulators
3 Description
The LM2672 series of regulators are monolithic
integrated DC-DC converter built with a LMDMOS
process. These regulators provide all the active
functions for a step-down (buck) switching regulator,
capable of driving a 1-A load current with excellent
line and load regulation. These devices are available
in fixed output voltages of 3.3 V, 5 V, 12 V, and an
adjustable output version.
Requiring a minimum number of external
components, these regulators are simple to use and
include patented internal frequency compensation,
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 is required with lower
frequency switching regulators. Because of its very
high efficiency (>90%), the copper traces on the
printed-circuit board are the only heat sinking
required.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOIC (8)
5.00 mm × 6.20 mm
LM2672
PDIP (8)
10.16 mm × 6.60 mm
WSON (16)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
Fixed output voltage versions
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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LM2672M-12 Datasheet Preview

LM2672M-12 Datasheet

High Efficiency 1-A Step-Down Voltage Regulator

No Preview Available !

LM2672
SNVS136L – SEPTEMBER 1998 – REVISED JUNE 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics – 3.3 V .............................. 5
7.6 Electrical Characteristics – 5 V ................................. 5
7.7 Electrical Characteristics – 12 V ............................... 5
7.8 Electrical Characteristics – Adjustable...................... 6
7.9 Electrical Characteristics – All Output Voltage
Versions ..................................................................... 6
7.10 Typical Characteristics ............................................ 7
7.11 Typical Characteristics – Fixed Output Voltage
Versions ..................................................................... 9
8 Parameter Measurement Information ................ 10
9 Detailed Description ............................................ 11
9.1 Overview ................................................................. 11
9.2 Functional Block Diagram ....................................... 11
9.3 Feature Description................................................. 11
9.4 Device Functional Modes........................................ 12
10 Application and Implementation........................ 13
10.1 Application Information.......................................... 13
10.2 Typical Applications .............................................. 14
11 Power Supply Recommendations ..................... 25
12 Layout................................................................... 25
12.1 Layout Guidelines ................................................. 25
12.2 Layout Examples................................................... 25
13 Device and Documentation Support ................. 27
13.1 Documentation Support ........................................ 27
13.2 Receiving Notification of Documentation Updates 27
13.3 Community Resources.......................................... 27
13.4 Trademarks ........................................................... 27
13.5 Electrostatic Discharge Caution ............................ 27
13.6 Glossary ................................................................ 27
14 Mechanical, Packaging, and Orderable
Information ........................................................... 27
14.1 DAP (WSON Package) ......................................... 27
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision K (April 2013) to Revision L
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section .................................................................................................. 1
• Removed all references to Computer Design Software LM267X Made Simple (Version 6.0).............................................. 1
Changes from Revision J (April 2013) to Revision K
Page
• Changed layout of National Data Sheet to TI format ............................................................................................................. 1
2
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Product Folder Links: LM2672
Copyright © 1998–2016, Texas Instruments Incorporated


Part Number LM2672M-12
Description High Efficiency 1-A Step-Down Voltage Regulator
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