TPS77301DGKR

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TPS77301DGKR Application Field and Working Principle

The Texas Instruments TPS77301DGKR is a low-power, low-cost, low-dropout CMOS voltage regulator. It is part of the Linear voltage regulators family within the Power Management Integrated Circuits (PMIC) product segment. This regulator provides better than 2 V output accuracy over a wide load and temperature range, and has an input voltage limit of 6.5 V or 10 V.

The TPS77301DGKR is designed to provide clean outputs to load currents up to 10 mA in none-critical applications and 2 mA in mission critical applications. The output voltage is adjustable from 0.8 V to 3.3 V using two external resistors. The maximum current drain can be set using an external resistor, and the device is protected from output short-circuit and over-temperature conditions.

Currently, the TPS77301DGKR is used in various applications such as USB circuits, battery-charging, lowered power consumption for portable equipments and low voltage among others. It is also used for powering MCUs and other systems in a variety of applications, portable instruments, wireless communication systems and switches.

Working Principle

The TPS77301DGKR is a simple voltage regulator that uses the classical voltage regulator principle. The linear voltage regulator converts a higher input voltage to a regulated lower output voltage. The TPS77301DGKR is a CMOS (Complementary Metal Oxide Semiconductor) device, which means that it is a low power device with a low quiescent current.

The CMOS device consists of two sets of transistors, with one set working as pull-up transistors and the other as pull-down transistors. The combination of these two sets of transistors forms an input stage, and this is the most important stage of the voltage regulator. This stage is responsible for setting the output voltage. In the TPS77301DGKR, this is done by varying the gate voltage of the pull-up transistors. The transistor configuration also provides output short-circuit protection.

The linear voltage regulator also provides other necessary functions such as over-temperature protection and noise filtering. It also has an in-put voltage limiter, which limits the input voltage to 7 V or 10 V, depending on the parts used. This helps to protect the circuit from voltage spikes.

Most importantly, the TPS77301DGKR has the capability to maintain a very stable output voltage across different types of load, temperature and input voltage changes. This makes it an ideal choice for use in low power applications, such as those found in portable electronics and wireless communication systems.

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