REG1117FA-2.5/500

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Voltage regulator is an important part of a power system. The REG1117FA-2.5/500 is a three terminal linear adjustable regulator which can be used as a low dropout voltage regulator with features such as low quiescent current and high output current. It is also capable of providing up to 500mA output current. The REG1117FA-2.5/500 is suitable for a wide range of applications, including general purpose power supplies, automotive systems, and distributed power.

Application Field

The REG1117FA-2.5/500 is designed to provide a stable voltage output while consuming low quiescent current. It is suitable for low dropout voltage regulator applications. This device is well-suited for many applications where a very low dropout voltage is required, such as notebook PCs, gaming consoles, and set-top boxes. Its low quiescent current makes it a suitable choice for battery powered applications.

The REG1117FA-2.5/500 is also suitable for low speed automotive and automotive audio systems. It provides stable supply voltage for improving the sound quality. Its up to 500mA output current can drive LEDs for high brightness. This device is also suitable for distributed power and power chain applications, where many voltages are needed with very low noise.

Working Principle

The REG1117FA-2.5/500 is a linear regulator. It operates by maintaining a constant voltage drop across its output transistor, creating a voltage reference. The input voltage of the IC is compared to the voltage reference, and the output is adjusted accordingly so that the output voltage is always constant.

The REG1117FA-2.5/500 has a programmable output voltage range of 1.2V to 3.95V. This range is determined by the value of the external feedback resistor. The resistors are programmed by varying their resistance between 0 and 200kΩ. The output voltage is set by a voltage divider formed by the two resistors R1 and R2. R1 is a fixed resistor, while R2 is a variable resistor.

The device features thermal shutdown protection, current limiting protection, and reverse current protection. The output voltage is maintained with very low output noise as the input voltage fluctuates. It also has an output enable pin, which can be used to enable/disable the regulator.

In summary, the REG1117FA-2.5/500 is a three terminal linear adjustable low dropout voltage regulator that can provide up to 500mA output current. This device is suitable for many applications such as general purpose power supplies, automotive systems, distributed power, and battery powered applications. It provides a stable voltage output with low quiescent current and very low output noise.

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