LM1117 PDF – Low Dropout Voltage Regulator

Part number : LM1117, LM1117I, LM1117T-3.3

Functions : Low dropout voltage regulators with a dropout of 1.2V at 800mA

Package information : TO-220-4 Pin, DDPAK / TO-263 Type

Manufacturer : National Semiconductor, Texas Instruments


LM1117 Voltage Regulator


The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. It has the same pin-out as National Semiconductor’s industry standard LM317.
The LM1117 is available in an adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external resistors. In addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V. The LM1117 offers current limiting and thermal shutdown. Its circuit includes a zener trimmed bandgap reference to assure output voltage accuracy to within ±1%.


LM1117 pinout datasheet


1. Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions
2. Space Saving SOT-223 and LLP Packages
3. Current Limiting and Thermal Protection
4. Output Current 800mA
5. Line Regulation 0.2% (Max)
6. Load Regulation 0.4% (Max)

Typical Application

LM1117 Block Diagram


1. 2.85V Model for SCSI-2 Active Termination
2. Post Regulator for Switching DC/DC Converter
3. High Efficiency Linear Regulators
4. Battery Charger
5. Battery Powered Instrumentation

Referece Site : http://www.ti.com/product/LM1117

LM1117 Datasheet PDF