STMicroelectronics

LD2981CU50TR

LD2981CU50TR Description

The LD2981CU50TR from STMicroelectronics is a low-dropout (LDO) linear voltage regulator designed to deliver a fixed 5V output with a maximum current of 100mA. It operates with an input voltage range up to 16V, making it suitable for a variety of power supply applications. The device features a low dropout voltage of 0.375V @ 100mA, ensuring efficient performance even with minimal headroom. With a quiescent current of just 150 µA and a supply current of 2.6 mA (max), it is optimized for power-sensitive designs. The regulator is housed in a compact SOT89-3 package and is available in Tape & Reel (TR) for automated assembly.

LD2981CU50TR Features

• Fixed 5V Output: Stable and precise voltage regulation for sensitive electronics.
• Low Dropout Voltage: 0.375V @ 100mA ensures efficiency in low-input scenarios.
• Low Quiescent Current: 150 µA minimizes power loss in standby/battery-operated systems.
• High PSRR: 63dB @ 1kHz for superior noise rejection in noisy environments.
• Robust Protection: Includes over-current and over-temperature safeguards.
• Wide Input Range: Supports up to 16V, accommodating various power sources.
• Compact & Reliable: SOT89-3 package with MSL1 (Unlimited) moisture sensitivity, ideal for space-constrained designs.
• Compliance: ROHS3 and REACH compliant, meeting environmental standards.

LD2981CU50TR Applications

• Battery-Powered Devices: Ideal for portable electronics due to low Iq and dropout.
• Industrial Control Systems: Reliable voltage regulation for sensors and microcontrollers.
• Automotive Electronics: Stable 5V supply for infotainment or low-power modules.
• Consumer Electronics: Used in smart home devices, wearables, and IoT applications.
• Medical Devices: Precision power management for diagnostic and monitoring equipment.

Conclusion of LD2981CU50TR

The LD2981CU50TR stands out as a high-performance LDO regulator, combining low power consumption, high PSRR, and robust protection in a compact form factor. Its wide input range and low dropout make it versatile for battery-operated and industrial applications. With STMicroelectronics' reliability and compliance with environmental standards, this regulator is an excellent choice for designers seeking efficiency and durability in power management solutions.