TPS73433DDCR

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The TPS73433DDCR is a low-dropout (LDO) linear voltage regulator produced by Texas Instruments. It has a wide operating temperature range of -40˚C to +125˚C and provides high-current power regulation and dual-stage noise rejection characteristic. The device also has a low quiescent current of 20 μA and is designed for robust protection against reverse voltage for high load transients.

The device provides a wide variety of applications, including automotive, industrial, and consumer electronics. Specifically, it can be used for regulating the output of a power supply, providing a stable output voltage for a variety of applications. It can also be used as an auxiliary voltage regulator for microcontrollers, digital signal processors (DSPs), and other digital logic ICs. In addition, the device can be used for powering load switches and for other battery-operated systems, such as portable medical equipment.

TPS73433DDCR Working Principle

The TPS73433DDCR operates on a classic three-pin voltage regulator design, which includes an input voltage, output voltage, and ground terminal. A feedback control loop monitors the output voltage, and an internal control circuit sets the output voltage to the desired level by adjusting the input current. The device works based on an LP2950-type constant current source, which adjusts the current drawn from the input voltage terminal to keep the output voltage constant. Input voltage is kept internal, providing high-precision regulation and increasing the output\'s effective ripple rejection, while the low dropout voltage allows a wide input voltage range.

The device also includes circuitry to protect it from current overloads and temperature overloads. The overload protection is achieved by including an internal MOSFET that shuts off when a preset current is exceeded. In addition, the device is protected against excessively high temperatures using an integrated temperature sensor.

Conclusion

The TPS73433DDCR is a highly efficient and versatile low-dropout linear voltage regulator. With its wide operating temperature range and high output current capability, it is ideal for a variety of applications, including battery-powered systems, automotive and industrial electronics, and digital logic ICs. Its LP2950-type constant current source provides very accurate voltage regulation, while the built-in overload protection feature prevents it from damage due to excessive current or temperature.

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