STMicroelectronics

LD2981ABM38TR

LD2981ABM38TR Description

The LD2981ABM38TR is a linear regulator IC designed by STMicroelectronics, offering a fixed output voltage of 3.8V and a maximum output current of 100mA. This device is housed in a compact SOT23-5 package, making it suitable for surface mount applications. It features a maximum input voltage of 16V and a dropout voltage of 0.375V at 100mA, ensuring efficient operation even at low input-to-output voltage differences. The regulator includes an enable control feature and provides over-current and over-temperature protection, enhancing its reliability and safety in various electronic circuits.

LD2981ABM38TR Features

• Output Type: Fixed, providing a stable 3.8V output voltage.
• Input Voltage Range: Up to 16V, offering flexibility in power supply requirements.
• Output Current: 100mA, suitable for low to medium current applications.
• Dropout Voltage: 0.375V at 100mA, ensuring high efficiency at low input-to-output voltage differences.
• Quiescent Current: 150 µA, minimizing power consumption in standby mode.
• Power Supply Rejection Ratio (PSRR): 63dB at 1kHz, providing excellent noise suppression.
• Protection Features: Over-current and over-temperature protection, enhancing reliability and safety.
• Control Features: Enable function, allowing dynamic control of the regulator.
• Package Type: SOT23-5, ideal for surface mount applications and compact designs.
• Compliance: ROHS3 compliant and REACH unaffected, ensuring environmental and regulatory standards are met.
• Mounting Type: Surface Mount, suitable for automated assembly processes.
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited), making it suitable for various manufacturing environments.

LD2981ABM38TR Applications

The LD2981ABM38TR is ideal for a wide range of applications where a stable and efficient power supply is required. Its low dropout voltage and fixed output voltage make it particularly suitable for battery-powered devices and portable electronics. The enable feature allows for dynamic control, making it ideal for systems that require power management and low power consumption in standby mode. Its compact SOT23-5 package and surface mount design make it suitable for space-constrained applications, such as:

• Portable consumer electronics
• Battery-powered devices
• Low-power embedded systems
• Industrial control modules
• Automotive electronics

Conclusion of LD2981ABM38TR

The LD2981ABM38TR from STMicroelectronics is a robust and efficient linear regulator designed for applications requiring a stable 3.8V output and up to 100mA of current. Its low dropout voltage and high PSRR make it particularly suitable for applications where efficiency and noise suppression are critical. The inclusion of over-current and over-temperature protection features ensures reliability and safety, while the enable control function provides additional flexibility. Despite being marked as obsolete, the LD2981ABM38TR remains a viable option for designers seeking a compact, efficient, and reliable power management solution.