TPS77815PWPG4

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The TPS77815PWPG4 is a linear voltage regulator from Texas Instruments. It is a low-voltage, single-output device with an adjustable output voltage from 0.8V to 18V. It offers high output current, low-quiescent current and excellent line and load regulation. The device is designed for use in applications such as telecommunications and networking, computing systems, peripherals, consumer electronics and industrial control.

Features

• Voltage Range: 0.8V to 18V
• Output Current: 0.7A
• Quiescent Current: 25 µA
• Line and Load Regulation: ± 0.5%
• Overvoltage Protection: 160mA
• Thermal Protection: –40°C to +125°C

Application Field

The TPS77815PWPG4 is ideally suited for a wide range of applications. It can be used in voltage regulator applications due to its excellent line and load regulation. It is ideal for low-voltage applications such as telecommunications and networking, computing systems, peripherals, consumer electronics and industrial control. Its low quiescent current and thermal protection make it particularly suitable for these applications.

Working Principle

The TPS77815PWPG4 utilises a linear voltage regulator topology. It works by sensing the output voltage and comparing it to the "reference" voltage provided by an internal band gap circuit. If the output voltage is lower than the reference voltage, the device will increase the current (and hence the voltage) until the two become equal. Conversely, if the output voltage is higher than the reference voltage, the device will decrease the current (and hence the voltage) until the two become equal. This ensures that the output voltage remains as close as possible to the desired value, providing excellent line and load regulation.

To further ensure stability, the TPS77815PWPG4 has a number of protection features. It is equipped with an overvoltage protection circuit to safeguard the device from excessive voltage. It also has thermal protection to ensure that it is not damaged by high temperature conditions.

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