REG1117FA-1.8KTTT

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Voltage regulators are a type of integrated circuit, or IC, that is used to supply a certain voltage regardless of the input voltage. The REG1117FA-1.8KTTT is a linear voltage regulator from Texas Instruments that is suitable for a wide range of applications. This article will explore the application field and working principle of this device.

Overview of the REG1117FA-1.8KTTT

The REG1117FA-1.8KTTT is a fixed-output, low-dropout (LDO) voltage regulator. It requires an input voltage ranging from 2.25V to 15V and produces an output voltage of 1.8V. This regulator operates in normal or shutdown mode and can deliver up to 1A of output current. It is a three-pin device, with Vin, Gnd, and Vout. In addition, the device is designed to be used in either a through-hole or a surface-mount configuration. The device is rated for a maximum temperature of 125°C and is also AEC-Q100 qualified. There is also a reverse current protection feature that helps prevent damage due to load transients.

Applications of the REG1117FA-1.8KTTT

The REG1117FA-1.8KTTT is suitable for a wide range of applications, including powering microprocessors, DSPs, FPGAs, ASICs, and other analog and digital ICs. It is also suitable for automotive and industrial applications. The device is suitable for both adjustable and fixed voltage applications. Additionally, it is designed to provide improved system reliability and enhanced EMI performance.

Working Principle of the REG1117FA-1.8KTTT

The REG1117FA-1.8KTTT has a simple working principle. It functions as a linear regulator when the input voltage is greater than the output voltage. The device uses an external resistor to divide the input voltage to the appropriate level. This divided voltage is then compared to the reference voltage. If the divided voltage is less than the reference voltage, the device will turn on the series pass transistor until the two values match, thus providing a constant output voltage.

In addition, the device also has an on-chip thermal protection feature. This feature monitors the junction temperature of the device and shuts off the output if it exceeds the maximum operating temperature. This helps protect the device from damage due to excessive heat. Finally, the device also has an on-chip reverse-current protection feature that helps protect the device against load transients.

Summary

The REG1117FA-1.8KTTT is a linear voltage regulator from Texas Instruments that is suitable for a wide range of applications including powering microprocessors, DSPs, FPGAs, ASICs, and other analog and digital ICs. It operates in normal or shutdown mode and can deliver up to 1A of output current. It is rated for a maximum temperature of 125°C and is also AEC-Q100 qualified. The device has an external resistor to divide the input voltage to the appropriate level, an on-chip thermal protection, and an on-chip reverse-current protection feature. All these features make the device an attractive option for a wide range of applications.

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