LM2931AD50R

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

The LM2931AD50R is a fixed-output low-dropout (LDO) voltage regulator manufactured by STMicroelectronics. It provides a stable 5 V output with a maximum load current of 100 mA. The device features a typical dropout voltage of 90 mV at 10 mA and a quiescent current of 2.5 mA. It operates within an input voltage range of 6 V to 40 V and supports a junction temperature range from -40 °C to +125 °C. The unit is housed in a TO-92 package with three pins, designed for through-hole mounting.

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

• Provides fixed 5 V regulated output suitable for digital logic circuits
• Features very low dropout voltage for efficient power management
• Includes internal thermal overload and short-circuit protection
• Supports automotive-grade operation with high temperature tolerance

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

• Automotive electronic systems requiring reverse battery protection
• Battery-powered devices needing low quiescent current
• Local regulation in distributed power supply architectures
• Noise-sensitive analog and digital circuit powering

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

Verify the specific suffix 'AD' against official STMicroelectronics documentation to confirm exact accuracy class and availability status. Ensure the ordering code matches the required package type and tape/reel specifications if applicable. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and compliance with RoHS directives before finalizing procurement orders.

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

Select this component when a fixed 5 V output is required with minimal voltage drop across the regulator. Consider the TO-92 package constraints for thermal dissipation at higher load currents. Verify that the input voltage remains within the specified 6 V to 40 V range to ensure proper regulation and avoid damage. Check compatibility with existing PCB footprint designs for through-hole assembly processes.

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

The LM2931 series comprises very low dropout regulators designed for low-noise and low-power applications. This specific variant belongs to the family offering fixed output voltages, distinguishing it from adjustable versions like the LM2931D. The series is characterized by its robustness in automotive environments, featuring protection against load dumps and reverse polarity events, making it suitable for harsh operating conditions.

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

LM2931AZ50R: Verified equivalent fixed 5 V LDO in TO-92 package from STMicroelectronics.