STMicroelectronics

L4940D2T85

L4940D2T85 Description

The L4940D2T85 is a linear voltage regulator designed by STMicroelectronics, offering a fixed output voltage of 8.5V and a maximum output current of 1.5A. This regulator is housed in a robust D2PAK surface-mount package, making it suitable for a variety of electronic applications. Despite its status as an obsolete product, the L4940D2T85 remains a reliable choice for applications requiring a stable voltage supply with minimal dropout voltage.

L4940D2T85 Features

• Output Type: Fixed
• Input Voltage Range: Up to 17V
• Output Voltage: Fixed at 8.5V
• Output Current: Up to 1.5A
• Number of Regulators: 1
• Output Configuration: Positive
• Supply Current: Maximum of 50 mA
• Dropout Voltage: Maximum of 0.9V at 1.5A, ensuring efficient operation even at low input-to-output voltage differentials
• Quiescent Current: 8 mA, contributing to low power consumption
• Power Supply Rejection Ratio (PSRR): 68dB at 120Hz, providing excellent noise rejection
• Protection Features: Over-temperature protection, reverse polarity protection, and short-circuit protection ensure robustness and reliability
• Compliance: REACH unaffected and ROHS3 compliant, meeting environmental and regulatory standards
• Moisture Sensitivity Level (MSL): Level 1 (unlimited), suitable for a wide range of manufacturing environments
• Mounting Type: Surface mount, facilitating compact and reliable PCB designs
• Package: D2PAK, available in tube packaging for convenient handling and storage

L4940D2T85 Applications

The L4940D2T85 is ideal for applications requiring a stable and reliable power supply with a fixed output voltage. Its low dropout voltage makes it particularly suitable for battery-powered devices and systems where the input voltage may vary significantly. The regulator's robust protection features and compliance with environmental standards make it a versatile choice for various industrial and consumer electronics applications.

• Battery-Powered Devices: The low dropout voltage ensures efficient operation as the battery discharges, maintaining a stable output voltage.
• Industrial Control Systems: The regulator's robustness and protection features make it suitable for harsh industrial environments.
• Consumer Electronics: Ideal for devices requiring a stable power supply, such as portable audio equipment and small appliances.
• Automotive Applications: Suitable for automotive electronics where reliability and protection against voltage spikes and reverse polarity are crucial.

Conclusion of L4940D2T85

The L4940D2T85 from STMicroelectronics is a reliable linear voltage regulator offering a fixed output voltage of 8.5V and a maximum output current of 1.5A. Its low dropout voltage, robust protection features, and compliance with environmental standards make it a versatile choice for a wide range of applications. Despite its obsolete status, the L4940D2T85 remains a valuable component for designers seeking a stable and efficient power supply solution.