RT9169-30PB

Updated: 2026-07-15

Overview

The RT9169-30PB is a low-dropout (LDO) voltage regulator integrated circuit (IC) manufactured by Richtek Technology. It is designed to provide a stable output voltage with minimal power loss, making it ideal for battery-powered and energy-efficient applications. The IC operates with an input voltage range of 2.5V to 5.5V and delivers a fixed output voltage of 3.0V. Its low quiescent current (typically 75µA) and high accuracy (±2%) make it suitable for precision electronics.

Structure and Working Principle

The RT9169-30PB consists of a voltage reference, error amplifier, pass transistor, and feedback network. The error amplifier compares the output voltage to a reference voltage and adjusts the pass transistor to maintain a stable output. Its low dropout voltage (typically 300mV at 300mA load) ensures efficient operation even when the input voltage is close to the output voltage. This feature is critical for prolonging battery life in portable devices.

Key Features

The RT9169-30PB boasts several key features, including a low dropout voltage, high output accuracy, and low quiescent current. It also includes built-in protection mechanisms such as thermal shutdown and current limiting. The IC is available in a small SOT-23-5 package, making it suitable for space-constrained applications. Its fast transient response ensures stable performance under varying load conditions.

Application Areas

The RT9169-30PB is widely used in portable electronics, IoT devices, and embedded systems. Its low power consumption and small form factor make it ideal for smartphones, tablets, and wearable devices. It is also employed in industrial control systems, medical devices, and automotive electronics where reliable voltage regulation is critical.

Maintenance and Precautions

To ensure optimal performance, avoid exceeding the maximum input voltage (5.5V) and ensure adequate heat dissipation, especially in high-current applications. Proper PCB layout and decoupling capacitors are recommended to minimize noise and improve stability. Storage should be in a dry, static-free environment to prevent damage to the IC. Follow ESD precautions during handling and installation.

B2B Procurement Guide

When procuring the RT9169-30PB, verify the supplier's authenticity to avoid counterfeit products. Richtek Technology and authorized distributors are recommended sources. Consider bulk purchasing for cost savings, but ensure the components are stored properly to prevent moisture damage. Lead times and minimum order quantities (MOQs) vary by supplier, so plan accordingly.