STMicroelectronics

L78L18ACUTR  

Linear & Switching Voltage Regulators

L78L18ACUTR Description

The L78L18ACUTR from STMicroelectronics is a fixed-output linear voltage regulator designed to deliver a stable 18V output with a maximum current of 100mA. It operates within a wide input voltage range of up to 40V, making it suitable for applications requiring high-voltage regulation. This surface-mount device comes in a SOT89-3 package and is supplied in Tape & Reel (TR) for automated assembly. With a quiescent current of 6mA and a supply current of 6.5mA (max), it ensures efficient power management while maintaining low power dissipation. The regulator is RoHS3 compliant and REACH unaffected, meeting stringent environmental standards.

L78L18ACUTR Features

• Fixed 18V Output: Ensures precise voltage regulation for sensitive circuits.
• Wide Input Range (Up to 40V): Accommodates high-voltage inputs without external components.
• Low Dropout Operation: Optimized for minimal power loss.
• Robust Protection: Includes over-current, over-temperature, and short-circuit protection for enhanced reliability.
• High PSRR (38dB at 120Hz): Effectively suppresses input ripple and noise.
• Wide Operating Temperature (-0°C to +125°C): Suitable for industrial and automotive environments.
• Surface-Mount SOT89-3 Package: Compact and ideal for space-constrained designs.

L78L18ACUTR Applications

This regulator is ideal for applications requiring stable, low-noise voltage regulation, such as:

• Industrial Control Systems: Powering sensors, actuators, and control logic.
• Automotive Electronics: Supporting infotainment, lighting, and ECU peripherals.
• Consumer Electronics: Voltage regulation in audio amplifiers, set-top boxes, and small appliances.
• Telecom Equipment: Providing clean power for signal conditioning circuits.
• Battery-Powered Devices: Efficiently managing voltage in portable instruments.

Conclusion of L78L18ACUTR

The L78L18ACUTR stands out for its high input voltage tolerance, robust protection features, and compact form factor, making it a reliable choice for demanding applications. Its low quiescent current and high PSRR ensure efficient and noise-free operation, while compliance with RoHS3 and REACH underscores its environmental safety. Whether in industrial, automotive, or consumer electronics, this regulator delivers consistent performance under varying conditions.

L78L18ACUTR Documents

Download datasheets and manufacturer documentation for L78L18ACUTR

Datasheets :

L78L Datasheet      

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