RT9167-28GB

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The RT9167-28GB is a low dropout and low noise micropower regulator from Richtek Technology Corporation, designed for portable applications. It provides a fixed output voltage of 2.8V with 2% accuracy. The device supports an output current of 300mA or 500mA depending on the specific variant configuration. It utilizes an internal PMOS pass device to prevent extra ground current during heavy load conditions. The regulator operates stably with very low ESR capacitors, including 1µF ceramic types. Key electrical parameters include a typical shutdown current of nearly zero operation current, a typical operating current of 80µA, and a maximum input voltage of 7V.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Internal PMOS pass device eliminates extra ground current in heavy load and dropout conditions
• Stable operation with low ESR output capacitors, including 1µF ceramic types
• Reference bypass pin available to improve low noise performance
• Integrated current limiting and over temperature protection functions

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• Hand-held equipment

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to confirm the specific output voltage and current rating associated with the GB package code. Ensure compatibility with low ESR output capacitors as specified in the design guidelines. Confirm RoHS compliance status through the latest component documentation provided by Richtek Technology Corporation before finalizing procurement specifications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for applications requiring low noise power delivery in space-constrained portable devices. The internal PMOS architecture offers efficiency advantages over traditional NPN-based LDOs under heavy loads. Consider the 80µA typical operating current for battery life optimization. Ensure the input voltage range accommodates the source supply variations while maintaining regulation within the specified dropout voltage limits.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The RT9167 series represents a family of low dropout linear regulators optimized for portable electronics. This specific model belongs to the fixed output voltage variants, providing precise regulation without external feedback resistors. The series is characterized by its micropower consumption and stability with small ceramic capacitors, making it suitable for modern compact electronic designs where size and power efficiency are critical constraints.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Consult the official Richtek cross-reference list for verified substitute part numbers. Ensure any replacement maintains the same SOT-23-5 package footprint and pinout configuration. Verify that alternative components meet the required 2.8V output tolerance and support the necessary load current capabilities for the specific application circuit.