TPS7A4700RGWR

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TPS7A4700RGWR - Application Field and Working Principle

The TPS7A4700RGWR is a high-performance low-dropout linear regulator that is capable of supplying up to 300mA continuous output current. It is a step-down regulator that utilizes bipolar technology with a 10-bit DAC for voltage adjustment ranging from 0.9V to 2.5V. Its low quiescent current, low output noise and wide input voltage range of 1.8V-6V makes it ideal for a variety of power applications.

Application Field

The TPS7A4700RGWR is designed to be used in a wide range of mobile, computing and consumer applications. It can be used to power digital and analog functions in devices such as mobile phones, digital cameras, handheld devices and industrial equipment. It is also suitable for powering low-voltage microprocessors and digital signal processors. Furthermore, it can be used in automotive applications such as starter generators, ABS pumps and valve actuation.

Working Principle

The TPS7A4700RGWR is an ultra-low dropout linear voltage regulator in which power conversion is achieved by passing a load current through a series pass element and precision reference. The output voltage is set by an external resistor divider, a precision reference and a 10-bit DAC that allows precise voltage setting. It utilizes a PNP-NPN bipolar transistor for the series pass element. During operation, the quiescent current of the device increases with load current, due to the current mirror circuit from the output to the ground. Furthermore, the dropout voltage is regulated by the internal current mirror circuit, reducing dropout voltage at heavy load currents.

The TPS7A4700RGWR is designed to provide high efficiency while keeping quiescent current to a minimum. It features a high-performance bootstrap circuitry, which provides sufficient voltage to power the internal control circuit during start-up and heavy load transients. It also provides surge current protection to the output during power-up and power-down transients.

The TPS7A4700RGWR is designed with a low output noise and high PSRR, making it suitable for powering high-frequency circuits. It also features a wide operating input voltage range, enabling it to be used in a variety of power applications. Furthermore, the TPS7A4700RGWR has short-circuit and thermal shutdown protection to protect the device from abnormal conditions.

The TPS7A4700RGWR is an ideal solution for supplying power delivery in linear systems. It is a highly efficient, low-dropout regulator that offers the stability, reliability and flexibility needed for powering a range of applications.

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