EmbeddedRelated.com
The 2026 Embedded Online Conference
AS78L05RTR-G1

DIOAS78L05RTR-G1

Diodes Incorporated
Linear Voltage Regulator IC Positive Fixed 1 Output 100mA SOT-89-3
Active46,342 in stock

Overview

The AS78L05RTR-G1 is a fixed-output positive linear regulator designed to deliver 5V at up to 100mA of output current. It features internal short-circuit current limiting and thermal overload protection, making it a robust solution for local on-card regulation. This regulator can handle input voltages up to 30V and operates across a wide temperature range of -40C to 125C.

Why Choose This Part

This regulator is highly reliable due to its integrated safe-area protection and thermal shutdown features. It requires no external components for basic operation, simplifying PCB layout and reducing the total bill of materials. The SOT-89 package provides a compact footprint with sufficient thermal performance for low-power applications.

Applications

Local On-Board Regulation
Providing a stable 5V rail for logic circuits and microcontrollers from a higher voltage supply.
Post-Regulation
Used after switching regulators to reduce ripple and noise for sensitive analog circuits.
Industrial Instrumentation
Powering low-current sensors and interface circuits in rugged environments.
Consumer Electronics
Serving as a cost-effective voltage reference or bias supply in appliance control boards.

Key Specifications

PSRR 62dB (120Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-243AA
Current - Output 100mA
Protection Features Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 30V
Voltage Dropout (Max) 1.8V @ 100mA (Typ)
Supplier Device Package SOT-89-3
Current - Quiescent (Iq) 5.5 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

When designing with the AS78L05RTR-G1, place a 0.33uF ceramic capacitor on the input and a 0.1uF capacitor on the output close to the device pins to ensure stability and improve transient response. Ensure the input-to-output voltage differential stays within the 7V to 30V range for proper regulation. Designers should perform a thermal analysis to ensure the SOT-89 package can dissipate the heat generated by the voltage drop at the intended load current.

The 2026 Embedded Online Conference