STMicroelectronics LM2931AD33R

The LM2931AD33R is a low-dropout (LDO) voltage regulator from STMicroelectronics designed to provide a stable output voltage of 3.3V with a maximum output current of 1A. It is often used in various electronic applications where a stable voltage is critical, especially in battery-powered devices due to its low dropout voltage. Functions - Voltage Regulation: It maintains a constant output voltage of 3.3V even when the input voltage varies, provided that it is above the minimum required voltage. - Low Dropout Operation: Allows for minimal difference between the input and output voltages, enabling it to function effectively in battery-powered applications. - Thermal Shutdown: Protects the device from overheating by shutting it down if the temperature exceeds a safe limit. - Short-Circuit Protection: Ensures that the output is protected from excessive current draw which can cause damage. - Low Noise: Designed to minimize output voltage fluctuations, providing a stable power supply to sensitive components. Applications - Microcontroller Power Supplies: Ideal for powering microcontrollers and other logic devices that require a stable 3.3V supply. - Communication Devices: Used in RF or communication devices where low dropout and voltage stability are essential. - Portable Electronics: Suitable for battery-operated devices like mobile phones, handheld gadgets, etc. - Sensor Power Supply: Powers various sensors that require a stable voltage for accurate readings. Alternative Parts Some alternative parts for the LM2931AD33R include: - LM1117-3.3 (another low dropout regulator with similar specifications) - MIC5205 (3.3V LDO from Microchip) - TPS76333 (3.3V LDO from Texas Instruments) - LP2950 (low dropout regulator with similar performance) Embedded Modules Embedded modules featuring the LM2931AD33R may not be common, but you can generally find voltage regulation modules that can provide 3.3V output. These modules may include: - Voltage Regulator Modules: Modules specifically designed to step down voltages to 3.3V using LDOs like LM2931. - Power Supply Modules: Boards designed to power microcontrollers or development boards that usually need a stable 3.3V supply. Related Q&A Q1: What is the maximum output current for the LM2931AD33R? A1: The LM2931AD33R can provide a maximum output current of 1A. Q2: What is the dropout voltage of the LM2931AD33R? A2: The dropout voltage for the LM2931AD33R is relatively low, typically around 0.3V at full load, meaning it can maintain a stable output with a small difference between input and output voltage. Q3: Can the LM2931AD33R be used in battery-operated devices? A3: Yes, the LM2931AD33R is suitable for battery-powered applications due to its low dropout voltage, which allows it to operate effectively even when the battery voltage is near the output voltage. Q4: What protections does the LM2931AD33R have? A4: The LM2931AD33R includes thermal shutdown protection and short-circuit protection to ensure safe operation under adverse conditions. Q5: Are there other voltage outputs available for LM2931? A5: Yes, the LM2931 series includes various output voltage options. However, for the specific part number LM2931AD33R, the fixed output is set at 3.3V. Other parts in the family might provide different fixed outputs.