LM1117 3.3V LDO Regulator

The LM1117 is a low dropout (LDO) linear voltage regulator designed to provide a stable 3.3V output from higher input voltages with minimal voltage loss. It delivers up to 800mA output current, making it suitable for powering microcontrollers, sensors, communication modules, and other low-voltage digital circuits. The device features built-in current limiting and thermal shutdown protection for reliable operation under overload conditions. With simple external capacitor requirements and easy integration, the LM1117 is widely used in embedded systems, interface boards, and power regulation applications.

Features

- Low dropout voltage regulator design

- Fixed 3.3V regulated output

- Output current up to 800mA

- Typical dropout voltage of 1.2V

- Built-in current limiting protection

- Thermal shutdown protection

- Wide input voltage range

- Simple external capacitor requirement

- Suitable for digital and embedded systems

- Stable voltage for ESP8266, ESP32, and logic circuits

- TO-220 package for better heat dissipation

- Easy PCB mounting

- Reliable linear regulation performance

- Low noise output

Specifications

- Model: LM1117

- Device Type: Low Dropout Linear Voltage Regulator

- Output Voltage: 3.3V Fixed

- Maximum Output Current: 0.8A

- Dropout Voltage (Typical): 1.2V

- Input Voltage Range: 4.5V to 15V

- Output Voltage Accuracy: ±1%

- Protection Features: Current Limit, Thermal Shutdown

- Quiescent Current: Typical 5mA

- Line Regulation: Typical 0.2%

- Load Regulation: Typical 0.4%

- Operating Temperature Range: -40°C to +125°C

- Package Type: TO-220

- Mounting Type: Through-Hole

- Application Type: Power Regulation

Links

- 3D Model

- Datasheet

Tutorials

TESTING CHEAP LM1117 ADJ VOLTAGE REGULATOR