EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts    AP2127K-ADJTRG1
AP2127K-ADJTRG1

DIOAP2127K-ADJTRG1

Diodes Incorporated
Linear Voltage Regulator IC Positive Adjustable 1 Output 300mA SOT-23-5
Active70,547 in stock
Datasheet Digi-Key Compare Prices

Overview

The AP2127K-ADJTRG1 is a 300mA adjustable positive linear regulator designed for low-noise and low-dropout applications. It operates with an input voltage between 2.5V and 6V, making it ideal for battery-powered systems and standard 5V logic rails. The device features integrated over-current and over-temperature protection in a compact SOT-23-5 package.

Why Choose This Part

This LDO offers a high Power Supply Rejection Ratio of up to 68dB at 100Hz, ensuring clean power delivery even in noisy environments. Its ultra-low shutdown current of 0.1uA significantly extends battery life in standby modes, while the compatibility with low-ESR ceramic capacitors allows for a reduced PCB footprint.

Applications

Battery-Powered Instrumentation
Provides stable, low-noise power for sensitive analog sensors and measurement circuitry in portable devices.
Post-Regulator for Switching Supplies
Used to clean up ripple from DC-DC converters for noise-sensitive components like ADCs and DACs.
Logic Level Power
Adjustable output allows for powering non-standard voltage rails in specialized digital systems.
RF and Wireless Modules
Supplies clean power to low-power wireless transceivers where high PSRR is required to maintain signal integrity.

Key Specifications

PSRR 68dB ~ 45db (100Hz ~ 10kHz)
Output Type Adjustable
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Current - Output 300mA
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 85degC
Voltage - Input (Max) 6V
Voltage Dropout (Max) 0.3V @ 300mA
Voltage - Output (Max) 5.5V
Supplier Device Package SOT-23-5
Current - Quiescent (Iq) 90 uA
Voltage - Output (Min/Fixed) 0.8V

Getting Started

To use the AP2127K-ADJTRG1, calculate the resistor divider network connected to the ADJ pin to set your target output voltage. Ensure that input and output ceramic capacitors are placed as close to the pins as possible to maintain stability. For prototyping, this SOT-23-5 package can be used with standard SOT-23 breakout boards on a breadboard.

The 2026 Embedded Online Conference