EmbeddedRelated.com
    Parts    LM1117 / LD1117 LDO Family    LM1117T    LM1117T-3.3/NOPB
LM1117T-3.3/NOPB

TILM1117T-3.3/NOPB

Texas Instruments
LDO Voltage Regulators 800MA LDO LINEAR REG
108 in stock
Mouser Compare Prices

Overview

The LM1117T-3.3/NOPB is a popular low-dropout (LDO) linear voltage regulator designed to provide a stable 3.3V output from a higher input voltage. It can deliver up to 800mA of output current and features a power-efficient design with a dropout voltage typically around 1.2V at full load.

Why Choose This Part

This regulator offers built-in current limiting and thermal protection to prevent damage during fault conditions. The TO-220 package provides excellent thermal dissipation capabilities for high-current applications compared to surface-mount alternatives.

Applications

Microcontroller Power Supply
Providing a clean 3.3V rail for digital logic and MCUs in industrial and consumer electronics.
Post-Regulation for Switching Supplies
Smoothing out ripple and noise from DC-DC converters to protect sensitive analog components.
Battery-Powered Equipment
Regulating power in portable devices where a low-dropout voltage is necessary to maximize battery life.

Getting Started

To use this part, connect the input and output pins to decoupling capacitors as specified in the datasheet, typically a 10uF tantalum or electrolytic capacitor on the output for stability. Ensure the input voltage is at least 1.2V higher than the 3.3V output to maintain regulation.

Also Consider

LD1117V33 STMicroelectronics - A highly compatible 3.3V LDO in a TO-220 package often used as a direct alternative.
LM1117MP-3.3/NOPB TITexas Instruments - The SOT-223 surface-mount version of the same regulator for applications with limited PCB space.
LF33CV STMicroelectronics - Offers a much lower quiescent current and lower dropout voltage for power-sensitive designs.