STMicroelectronics

LM2931ADT33RY  

Linear & Switching Voltage Regulators

LM2931ADT33RY Description

The LM2931ADT33RY is a fixed-output linear regulator designed by STMicroelectronics, a leading manufacturer in the electronics industry. This device is part of the Power Management Integrated Circuits (PMIC) category and is specifically tailored for automotive applications. The LM2931ADT33RY features a fixed output voltage of 3.3V and can deliver a maximum output current of 100mA. It operates with an input voltage range up to 26V and is housed in a DPAK surface-mount package, making it suitable for compact and high-performance designs.

LM2931ADT33RY Features

• Fixed Output Voltage: The LM2931ADT33RY provides a stable 3.3V output voltage, ensuring consistent power supply to sensitive electronic components.
• High Input Voltage Range: With a maximum input voltage of 26V, this regulator can handle a wide range of input conditions, making it versatile for various automotive applications.
• Low Dropout Voltage: The maximum dropout voltage is 0.6V at 100mA, allowing the regulator to maintain efficiency even when the input voltage is close to the output voltage.
• Low Quiescent Current: The quiescent current is only 1mA, which is crucial for minimizing power consumption in standby or low-power modes.
• High PSRR: The Power Supply Rejection Ratio (PSRR) is 78dB at 120Hz, effectively filtering out noise from the input power supply and ensuring clean output voltage.
• Protection Features: The regulator includes current limit and thermal shutdown features, safeguarding the device and connected components from overcurrent and overheating.
• Automotive Grade: Certified for automotive use, the LM2931ADT33RY meets the stringent reliability and performance standards required for automotive electronics.
• Compliance: The device is REACH unaffected and RoHS3 compliant, adhering to environmental regulations and ensuring safe usage in various markets.

LM2931ADT33RY Applications

The LM2931ADT33RY is ideal for a variety of applications, particularly in the automotive sector, where reliability and performance are paramount. Specific use cases include:

• Automotive Electronics: Suitable for powering electronic control units (ECUs), infotainment systems, and other automotive electronics that require a stable 3.3V supply.
• Industrial Control Systems: Ideal for applications where a compact, high-efficiency regulator is needed to power microcontrollers, sensors, and communication interfaces.
• Consumer Electronics: Can be used in portable devices and consumer electronics that demand low power consumption and high reliability.
• Telecommunications: Applicable in base stations and other telecom equipment where a stable power supply is essential for maintaining system performance.

Conclusion of LM2931ADT33RY

The LM2931ADT33RY is a robust and versatile linear regulator designed to meet the demanding requirements of automotive and industrial applications. Its fixed 3.3V output, low dropout voltage, and high PSRR make it an excellent choice for ensuring stable and clean power supply. The inclusion of protection features and its automotive-grade certification further enhance its reliability and suitability for critical applications. While the device is marked as obsolete, its technical specifications and performance benefits continue to make it a valuable option for engineers and designers seeking a reliable power management solution.

LM2931ADT33RY Documents

Download datasheets and manufacturer documentation for LM2931ADT33RY

Datasheets :

LM2931 Datasheet      

HTML Datasheet :

LM2931 Datasheet