BL1117 / ME1117 LDO Voltage Regulator, 18V Input, 1A Output, Adjustable / Fixed Options, SOT-223 / TO-252 Package

The BL1117 and ME1117 are popular low-dropout (LDO) linear voltage regulators designed to provide up to 1A output current with reliable line and load regulation. Supporting input voltages up to 18V, these regulators are available in both fixed-output and adjustable versions, making them suitable for a wide range of power management applications. With robust thermal performance and simple external component requirements, they are widely used in consumer, industrial, and embedded systems.

Key Specifications

Input Voltage (VIN): Up to 18V

Output Current (IOUT): Up to 1A

Output Options: Fixed (e.g., 1.8V / 2.5V / 3.3V / 5V) and Adjustable

Regulator Type: Low-Dropout (LDO) linear regulator

Dropout Voltage: Low dropout design (typical ~1.1V at 1A)

Packages: SOT-223, TO-252 (DPAK)

Applications

• Microcontroller and processor power rails

• Post-regulation for DC/DC converters

• Consumer electronics

• Networking and telecom modules

• Industrial control boards

Features

• High output current capability up to 1A

• Wide range of fixed and adjustable outputs

• Good line and load regulation

• Built-in thermal shutdown and current limit

• Industry-standard pinout for easy replacement