TPS72515KTTT

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TPS72515KTTT Application Field and Working Principle

The TPS72515KTTT is an compact, reliable linear voltage regulator IC (TPS72515KTTT) from Texas Instruments. It belongs to the category of Power Management ICs, Voltage Regulators, Linear and finds a wide-variety of applications in the requirements for low noise and low power consumption.

Applications

The main application of the TPS72515KTTT is providing a low-noise and low-dropout power supply to the microcontroller and other digital logic devices. By combining it with other components, such as switched-mode regulators and passive components, a complete DC-DC power supply system can be created. The TPS72515KTTT can also be used in automotive, consumer, and industrial applications, as well as any other application that requires a low-noise, low-dropout, linear voltage regulator.

Features

The TPS72515KTTT IC has many features that enable it to meet the requirements for low-noise, low-dropout power supplies. Some of its features include:

• An adjustable, 100mA fixed-frequency, static regulator with no minimum input voltage requirement.
• Low quiescent current operation of 6.3µA.
• Programmable output voltage range from 0.9V to 5.5V.
• High ripple rejection ratio of 70dB.

Working Principle

The TPS72515KTTT IC works based on the principle of negative feedback loop. The IC contains an integrated pass transistor, which is connected to the output through two resistors. The output voltage is set by the voltage divider created by the two resistors, and the output voltage is compared to a reference voltage by the error amplifier. Depending on the difference between the output and reference voltages, the output current is adjusted by the pass transistor.

When the input voltage is higher than the output voltage, the pass transistor will be conducting and the output voltage will be regulated by the voltage divider. On the other hand, when the input voltage is lower than the output voltage, the pass transistor will be off, and the output voltage will be regulated by a network of capacitors.

Thus, the TPS72515KTTT IC is able to provide a low noise, low dropout, linear voltage regulation with minimal power consumption.

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