REG1117-5 – TEXAS INSTRUMENTS

The REG1117-5 is a low-dropout (LDO) linear voltage regulator integrated circuit from Texas Instruments, offering a fixed 5V output voltage. It features a typical input voltage range of 6.5V to 12V, enabling operation with a variety of power sources. The device guarantees a minimum output current of 1A with thermal shutdown protection preventing damage from overcurrent conditions. Packaged in a TO-220 surface-mount package, it offers excellent thermal dissipation capabilities for high-current applications. Its low quiescent current of approximately 5mA minimizes power waste, making it suitable for battery-powered designs._x000D_
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The REG1117-5 excels in applications requiring a stable 5V supply with minimal output ripple and noise. Its simplicity of use, requiring only two external capacitors for stable operation, reduces design complexity. Common applications include powering microcontrollers, digital-to-analog converters (DACs), and other integrated circuits demanding a clean, regulated 5V supply. The inherent low-noise characteristic makes it particularly advantageous in sensitive analog circuits where noise rejection is critical. However, its linear nature results in power dissipation proportional to the input-output voltage difference, limiting its efficiency at higher input voltages. Careful consideration of power dissipation and thermal management is crucial for high-current applications.