TPS71733DSET

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The TPS71733DSET is a Voltage Regulator part of the PMIC family, offering adjustable and fixed output voltage devices for numerous application fields. Operating as a Linear regulator, the part contains many features and functionally that allow for flexibility and efficacy. Knowing the various application fields of the TPS71733DSET, as well as its functional principles, can help engineers when design decisions arise.

Application Field

The TPS71733DSET is optimized for both high and low-power systems. It is designed to dissipate minimal power when the output load is low. It is commonly used in applications that require low-noise operation and ultra-low quiescent current consumption, such as in battery-powered applications and portable DSCs. Additionally, the part includes features such as short-circuit protection and thermal protection, offering a level of protection and reliability that is much needed.

Working Principle

The TPS71733DSET works as a Linear Regulator. This is a type of regulator commonly used to convert a higher DC voltage to a lower desired voltage. The Linear Regulator is created by placing a pass device (most often a MOSFET) between the input and output voltage. The pass device only allows current to flow if the input voltage is higher than the output voltage. This means that the voltage drop across the pass device will be the same as the output voltage.

The controlling element of the Linear Regulator is the error amplifier. This amplifier has three main functions: to sense the output voltage, compare it to a reference voltage, and receive feedback from the pass device about the load present on the output line. The error amplifier compares the output voltage to the reference voltage and produces an output signal that is proportional to the difference between the two. This signal is then passed to the pass device, which will adjust the resistance based on the signal from the error amplifier.

The Linear Regulator also incorporates a current limiting circuit. This circuit senses the load current and can limit the amount of current that is drawn from the input line. This prevents damage to components that may be connected to the input line and adds a level of safety to the power supply design. Additionally, the Linear Regulator is able to disconnect the output voltage if the reference voltage is not present. This provides protection to the system design and circuit components, should the input voltage exceed the specified level.

The Linear Regulator that is found in the TPS71733DSET allows for efficient and reliable operation, as well as providing protection against over-voltage and over-current events. The combination of current limiting, reference voltage sensing, error amplifier, and pass device allow for voltage regulation with a low amount of overall power dissipation.

Conclusion

The TPS71733DSET is a Voltage Regulator, part of the PMIC family, which operates as a Linear Regulator. It is optimized for high and low-power systems, commonly used in applications that require low-noise operation, low quiescent current consumption, and safety features such as short-circuit protection and thermal protection. Its operation is based on a current limiting circuit, a reference voltage sensing circuit, an error amplifier, and a pass device. All these features allow for efficient and reliable operation, as well as providing protection against over-voltage and over-current events.

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