onsemi

LM2931ADT-5.0

LM2931ADT-5.0 Description

The LM2931ADT-5.0 is a fixed 5V, 100mA low-dropout (LDO) linear voltage regulator from onsemi, designed for applications requiring stable power with minimal input-output differential. With a 26V maximum input voltage and a dropout as low as 0.6V at 100mA, this regulator is optimized for battery-powered and automotive systems where input voltage fluctuations are common. It features overcurrent and overtemperature protection, ensuring reliable operation under harsh conditions. The device is housed in a DPAK (TO-252) surface-mount package, making it suitable for compact PCB designs.

LM2931ADT-5.0 Features

• Low Dropout Voltage: 0.6V @ 100mA ensures efficient regulation even with low input voltages.
• High PSRR: 90dB at 120Hz minimizes noise, making it ideal for sensitive analog and digital circuits.
• Low Quiescent Current: 1mA typical, enhancing battery life in portable applications.
• Robust Protection: Includes overcurrent and overtemperature shutdown for enhanced reliability.
• Wide Input Range: Supports up to 26V, accommodating automotive and industrial power rails.
• Stable Output: Fixed 5V ±2% accuracy ensures consistent performance.

LM2931ADT-5.0 Applications

• Automotive Electronics: Powers sensors, ECUs, and infotainment systems due to its high input tolerance.
• Battery-Powered Devices: Ideal for handheld instruments, IoT nodes, and backup power circuits.
• Industrial Control Systems: Provides clean power for microcontrollers, ADCs, and communication modules.
• Consumer Electronics: Used in set-top boxes, routers, and peripherals requiring stable 5V rails.

Conclusion of LM2931ADT-5.0

The LM2931ADT-5.0 is a high-performance LDO regulator offering low dropout, excellent PSRR, and robust protection, making it a preferred choice for demanding environments. While marked obsolete, its reliability and efficiency ensure continued use in legacy designs and replacements. Its DPAK package and wide input range make it versatile for automotive, industrial, and portable applications where stable 5V power is critical.