TPS77818PWPR

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The TPS77818PWPR is a low-noise linear voltage regulator developed by Texas Instruments. It is a low-dropout regulator, which utilizes a linear converter to provide a regulated output voltage, while also maintaining excellent load regulation and transient response characteristics. This regulator is particularly well-suited for use in power applications that require precise output voltage levels, while also maintaining high efficiency and low power consumption. In this article, we will discuss the application field, working principle, and other features of the TPS77818PWPR linear voltage regulator.

Application Field

The TPS77818PWPR is a low-dropout linear regulator designed for 1.8V and 3.3V applications. It offers excellent output accuracy (±2% typical) and low output noise (0.3 mV RMS). This regulator is ideal for output voltages between 1.2V and 3.3V, and is well suited for various types of digital and analog applications that require audio and low-noise operation. Additionally, this device is well-suited for point-of-load and post-regulator applications that require high efficiency and fast response times. Examples of applications include adjustable and fixed point-of-Load (POL) converter applications, medical equipment, server supplies, as well as DSL, cable and wireless modems.

Working Principle

The TPS77818PWPR linear voltage regulator operates using an internal linear regulator circuit. This circuit consists of a series pass device, an error amplifier, and a current source. The series pass device acts as the main switch and is used to control the output voltage of the regulator. The error amplifier senses any difference between the actual output voltage and the reference voltage, and adjusts the output voltage accordingly. The current source is used to provide a current to the external load, and is used to ensure that the output voltage remains stable over a wide range of input and load conditions.

Features

The TPS77818PWPR linear voltage regulator offers a wide range of features, including:

• Wide input voltage range of 2.2V to 5.5V
• Very low dropout voltage (735 mV typ. at 500 mA)
• Excellent output accuracy of ±2% typical
• Programmable soft-start
• Programmable output voltage (1.2V to 6V
• Operating temperature range of -40°C to 85°C
• Output voltage options of 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V

In addition, the TPS77818PWPR also features reverse-charging current limiting and thermal shutdown protection. It is also capable of being configured for either adjustable or fixed output voltage applications.

Conclusion

The TPS77818PWPR is a low-dropout linear voltage regulator developed by Texas Instruments. This regulator provides excellent output accuracy, low output noise, and efficient performance in a wide range of digital and analog applications. The wide input voltage range, programmable soft start, and adjustable or fixed output voltage options make this an ideal choice for point-of-load and post-regulator applications that require precise output voltage levels with minimal noise.

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