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LM2931AZ-5.0RAG

ONLM2931AZ-5.0RAG

onsemi
Linear Voltage Regulator IC Positive Fixed 1 Output 100mA TO-92 (TO-226)
Active9,975 in stock
Datasheet Digi-Key Compare Prices

Overview

The LM2931AZ-5.0RAG is a fixed-output positive linear voltage regulator designed to provide a stable 5V rail at up to 100mA of output current. It features a very low quiescent current and is characterized by its high 90dB power supply rejection ratio at 120Hz, making it effective at filtering input ripple. Housed in a through-hole TO-92 package, it is well-suited for low-power regulation in legacy designs and prototyping environments.

Why Choose This Part

This regulator offers robust protection features including internal over-temperature and over-current limiting. It supports a wide operating temperature range from -40C to 125C and can handle input voltages up to 26V. The low-dropout nature and high PSRR ensure output stability even with minimal input-to-output voltage differentials.

Applications

Battery-Powered Logic
Provides a steady 5V supply for microcontrollers and logic ICs in portable equipment while maintaining low standby current.
Precision Sensor Power
Utilizes its high 90dB PSRR to provide clean power to sensitive analog sensors from noisy input sources.
Automotive Accessory Power
Regulates local power rails for cabin electronics and instrumentation requiring up to 100mA.
Post-Regulation
Acts as a secondary stage regulator behind a switching power supply to minimize high-frequency switching noise.

Key Specifications

PSRR 90dB (120Hz)
Output Type Fixed
Mounting Type Through Hole
Package / Case TO-226-3, TO-92-3 Long Body, Formed Leads
Current - Output 100mA
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 26V
Voltage Dropout (Max) 0.6V @ 100mA
Current - Supply (Max) 30 mA
Supplier Device Package TO-92 (TO-226)
Current - Quiescent (Iq) 1 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

To use this device, connect the input pin to a DC source between 6V and 26V and place a capacitor near the input and output pins for stability. Ensure the output load does not exceed 100mA and provide sufficient PCB area or airflow for heat dissipation if operating at high input-to-output voltage differentials.

LM2931 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
LM2931AZ-5.0RAG (this part) 3-226 9,975
LM2931AZ-5.0RPG 3-226 5,934
LM2931AD-5.0R2G SOIC-8 23,435
LM2931Z-5.0RPG 3-226 1,895
LM2931AZ-5.0G 3-226 1,979
LM2931AT-5.0G 3-220 126

Also Consider

MC78L05ABPG ONonsemi - A standard 100mA 5V regulator with a higher maximum input voltage of 30V but generally lower PSRR than the LM2931 series.