Texas Instruments

REG1117F-3.3/500

REG1117F-3.3/500 Description

The REG1117F-3.3/500 is a fixed output linear regulator designed for applications requiring a stable 3.3V output voltage with a maximum output current of 800mA. Manufactured by Texas Instruments, this regulator is part of the Power Management Integrated Circuits (PMIC) category and is housed in a surface-mount DDPAK package, making it suitable for compact and efficient power supply designs.

This regulator features a maximum input voltage of 15V and a dropout voltage of 1.2V at full load, ensuring efficient operation even under varying input conditions. The quiescent current is kept low at 10mA, contributing to overall power efficiency. Additionally, the regulator offers a high power supply rejection ratio (PSRR) of 62dB at 120Hz, which helps in minimizing noise and ripple in the output voltage.

The REG1117F-3.3/500 includes protection features such as over-current and over-temperature protection, ensuring reliable operation and safeguarding against potential faults. It is REACH unaffected and RoHS3 compliant, adhering to stringent environmental and safety standards. The moisture sensitivity level (MSL) is rated at 2 (1 Year), making it suitable for various manufacturing environments.

REG1117F-3.3/500 Features

• Output Type: Fixed 3.3V output voltage
• Input Voltage Range: Up to 15V
• Output Current: 800mA
• Dropout Voltage: 1.2V @ 800mA
• Quiescent Current: 10mA
• PSRR: 62dB at 120Hz
• Protection Features: Over-current and over-temperature protection
• Compliance: REACH unaffected, RoHS3 compliant
• Moisture Sensitivity Level: MSL 2 (1 Year)
• Package Type: Surface-mount DDPAK
• Mounting Type: Tape & Reel (TR)

REG1117F-3.3/500 Applications

The REG1117F-3.3/500 is ideal for a variety of applications where a stable and efficient power supply is required. Its fixed 3.3V output makes it suitable for powering microcontrollers, digital signal processors (DSPs), and other low-voltage digital circuits. The regulator's low dropout voltage and high PSRR make it particularly useful in applications where input voltage fluctuations are common, such as in battery-powered devices or systems with varying power supply voltages.

Specific use cases include:

• Consumer Electronics: Powering low-voltage components in smartphones, tablets, and portable gaming devices.
• Industrial Equipment: Providing stable power to sensors, actuators, and control systems in industrial automation.
• Medical Devices: Ensuring reliable power supply for medical monitoring equipment and portable diagnostic devices.
• Automotive Electronics: Supplying power to electronic control units (ECUs) and other automotive systems.

Conclusion of REG1117F-3.3/500

The REG1117F-3.3/500 from Texas Instruments is a robust and efficient linear regulator designed to meet the demands of modern power management applications. Its fixed 3.3V output, low dropout voltage, and high PSRR make it an ideal choice for applications requiring stable and noise-free power supply. The inclusion of over-current and over-temperature protection ensures reliable operation, while its compliance with environmental standards makes it a responsible choice for manufacturers.

Despite being marked as obsolete, the REG1117F-3.3/500 remains a viable option for legacy systems and applications where its unique features and performance benefits are still highly valued. For new designs, engineers may consider its successor models or alternative regulators that offer similar or improved specifications.