STMicroelectronics L4931CDT33-TR Linear Voltage Regulator 3.3V 250mA DPAK

STMicroelectronics L4931CDT33-TR: Precision Linear Voltage Regulation for Modern Electronics

In today's rapidly evolving electronics landscape, reliable power management solutions are critical for ensuring optimal device performance. The L4931CDT33-TR from STMicroelectronics stands as a benchmark in linear voltage regulation technology, delivering precise 3.3V output with exceptional stability and efficiency. This surface-mount regulator combines advanced thermal protection with low dropout voltage characteristics, making it ideal for space-constrained applications requiring stable power delivery.

Technical Excellence in Power Management

Engineered with STMicroelectronics' proprietary BiCMOS/DMOS technology, the L4931CDT33-TR maintains consistent voltage regulation even under fluctuating load conditions. Its 250mA output current capacity makes it suitable for powering sensitive circuits in consumer electronics, industrial control systems, and automotive applications. The device's 20V maximum input voltage rating provides design flexibility while maintaining safe operating parameters through integrated protection mechanisms.

Advanced Protection Features

This linear regulator incorporates comprehensive safety mechanisms to ensure reliable operation in demanding environments. The integrated over-temperature protection (OTP) and over-current protection (OCP) circuits safeguard against thermal runaway and electrical faults. These features make the L4931CDT33-TR particularly well-suited for automotive electronics and industrial equipment where component failure could have significant operational consequences.

With its 73dB PSRR (Power Supply Rejection Ratio) at 120Hz, the regulator effectively attenuates input voltage noise while maintaining stable output. The device's quiescent current of just 1mA ensures minimal power consumption during standby modes, making it an excellent choice for battery-powered applications requiring extended operational life.

Design Flexibility and Compatibility

The L4931CDT33-TR's surface-mount DPAK package combines thermal efficiency with space-saving design advantages. Its compatibility with standard PCB assembly processes enables seamless integration into modern manufacturing workflows. The regulator's wide operating temperature range (-40°C to 125°C) ensures reliable performance in both industrial and automotive environments where extreme temperatures are common.

Engineers will appreciate the device's tape-and-reel packaging format (TR), which facilitates automated component placement during mass production. The regulator's compatibility with common PCB design tools and its availability through major distribution channels make it a practical choice for both prototype development and high-volume manufacturing.

Applications Across Industries

This versatile regulator finds applications in numerous electronic systems including:

• Consumer electronics (smartphones, tablets, wearables)
• Industrial control systems (PLCs, sensors, automation equipment)
• Automotive electronics (infotainment systems, body control modules)
• Telecommunications infrastructure (network routers, base stations)
• Medical devices (portable diagnostics, monitoring equipment)

The L4931CDT33-TR's combination of performance, reliability, and design flexibility makes it an ideal solution for engineers seeking to implement robust power management in their designs. Whether developing cutting-edge IoT devices or automotive control units, this regulator provides the stability and protection required for modern electronic systems.

Tags: Linear Voltage Regulator, Power Management IC, Surface Mount Regulator, Low Dropout Regulator, Electronics Component