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Reference Design
LM1117
SNOS412O – FEBRUARY 2000 – REVISED JUNE 2020
LM1117 800-mA, Low-Dropout Linear Regulator
1 Features
•1 For a newer drop-in alternative, see the TLV1117 • Available in 1.8 V, 2.5 V, 3.3 V, 5 V, and
Adjustable Versions • Space-saving SOT-223 and WSON packages • Current limiting and thermal protection • Output current: 800 mA • Line regulation: 0.2% (maximum) • Load regulation: 0.4% (maximum) • Temperature range:
– LM1117: 0°C to 125°C – LM1117I: −40°C to 125°C
2 Applications
• AC drive power stage modules • Merchant network and server PSU • Industrial AC/DC • Ultrasound scanners • Servo drive control modules
3 Description
The LM1117 is a low dropout voltage regulator with a dropout of 1.2 V at 800 mA of load current.
The LM1117 is available in an adjustable version, which can set the output voltage from 1.25 to 13.8 V with only two external resistors. In addition, it is available in five fixed voltages, 1.8 V, 2.5 V, 3.3 V, and 5 V.
The LM1117 offers current limiting and thermal shutdown. Its circuit includes a Zener trimmed bandgap reference to assure output voltage accuracy to within ±1%.
A minimum of 10-µF tantalum capacitor is required at the output to improve the transient response and stability.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
SOT-223 (4) 6.50 mm × 3.50 mm
LM1117, LM1117I
TO-220 (3) TO-252 (3) WSON (8)
14.986 mm × 10.16 mm 6.58 mm × 6.10 mm 4.00 mm × 4.00 mm
TO-263 (3)
10.18 mm × 8.41 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Adjustable Output Regulator
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.
LM1117
SNOS412O – FEBRUARY 2000 – REVISED JUNE 2020
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Table..................................... 3 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5 7.2 ESD Ratings.............................................................. 5 7.3 Recommended Operating Conditions....................... 5 7.4 Thermal Information .................................................. 5 7.5 LM1117 Electrical Characteristics............................. 5 7.6 LM1117I Electrical Characteristics............................ 8 7.7 Typical Characteristics ............................................ 10 8 Detailed Description ............................................ 12 8.1 Overview ................................................................. 12 8.2 Functional Block Diagram ....................................... 12 8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 14 9 Application and Implementation ........................ 15
9.1 Application Information............................................ 15 9.2 Typical Application .................................................. 15 9.3 System Examples ................................................... 17 10 Power Supply Recommendations ..................... 18 11 Layout................................................................... 18 11.1 Layout Guidelines ................................................. 18 11.2 Layout Example .................................................... 22 12 Device and Documentation Support ................. 23 12.1 Documentation Support ........................................ 23 12.2 Receiving Notification of Documentation Updates 23 12.3 Support Resources ............................................... 23 12.4 Trademarks ........................................................... 23 12.5 Electrostatic Discharge Caution ............................ 23 12.6 Glossary ................................................................ 23 13 Mechanical, Packaging, and Orderable Information ........................................................... 23
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision N (January 2016) to Revision O
Page
• Added alternative device Features bullet .............................................................................................................................. 1 • Changed Applications section .................