LD39100PUR

The LD39100PUR is a low-dropout (LDO) voltage regulator manufactured by STMicroelectronics, designed to provide a stable output voltage with high efficiency and low noise. This device is particularly suitable for powering sensitive analog and digital circuits, including RF applications, microcontrollers, and other low-power devices.

Key Features:

1. Output Voltage: The LD39100PUR is available in various fixed output voltage options, typically ranging from 1.2V to 3.3V, making it versatile for different applications.

2. Low Dropout Voltage: The LDO features a low dropout voltage, typically around 300mV at full load, which allows it to maintain regulation even when the input voltage is only slightly above the output voltage. This is particularly beneficial in battery-powered applications where maximizing battery life is crucial.

3. High Output Current: The device can deliver a maximum output current of up to 1A, making it suitable for powering a range of devices from low-power sensors to more demanding loads.

4. Low Quiescent Current: The LD39100PUR is designed to have a low quiescent current, which is essential for applications where power consumption needs to be minimized, such as in portable devices.

5. Power Supply Rejection Ratio (PSRR): The LDO offers a high PSRR, which helps to filter out noise from the input supply, ensuring a clean and stable output voltage. This is particularly important in sensitive analog applications.

6. Thermal Protection: The device includes built-in thermal shutdown protection, which prevents damage due to overheating by shutting down the regulator if the junction temperature exceeds a certain threshold.

7. Short-Circuit Protection: The LD39100PUR is equipped with short-circuit protection, which safeguards the device and the load in the event of a fault condition.

8. Package Options: The LD39100PUR is available in various compact packages, such as the SOT-223 and DFN, which facilitate easy integration into space-constrained designs.

9. Operating Temperature Range: The device operates over a wide temperature range, typically from -40°C to +125°C, making it suitable for automotive and industrial applications.

Applications:

• Portable Devices: Ideal for smartphones, tablets, and other battery-operated devices where efficiency and low quiescent current are critical.
• RF Applications: Suitable for powering RF circuits that require low noise and high stability.
• Microcontrollers: Provides a reliable power supply for microcontrollers and other digital logic devices.
• Sensor Power Supply: Can be used to power various sensors in IoT applications, ensuring stable operation.

Conclusion:

The LD39100PUR from STMicroelectronics is a robust and efficient LDO voltage regulator that meets the demands of modern electronic applications. Its combination of low dropout voltage, high output current capability, and excellent power supply rejection makes it an ideal choice for a wide range of applications, particularly where space and power efficiency are paramount.