TPS51275RUKR

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TPS51275RUKR application field and working principle

The TPS51275RUKR is an advanced 1.5V to 15V, 4-pin voltage regulator with a very low quiescent current that is suitable for a variety systems. It is available in a compact SOT-23E package, allowing a very small layout size and the flexibility of single or dual output configurations. This voltage regulator has several advanced features, including a 2.5V switch threshold that eliminates the need for manual adjustment. Additionally, the device provides an adjustable output voltage range of 1.5V to 15V, programmable over-voltage protection and over-current protection, and adjustable switching frequency.

The TPS51275RUKR is one of the most efficient and robust voltage regulators available and is capable of handling up to 1.5A of current and achieving up to 85% efficiency. It is the perfect choice for low-power, low-profile applications such as embedded systems, portable instruments, and industrial equipment.

Working Principle

The TPS51275RUKR is designed for applications requiring a low quiescent current, high efficiency, and precision voltage regulation. It utilizes a PWM-type (pulse-width modulation) voltage regulator design, which achieves optimal performance by regulating output voltage and current levels by pulsing the output switch in a controlled and efficient manner. The output voltage is precisely regulated by a feedback signal, which monitors the voltage and adjusts the pulse width of the output switch in order to maintain the output voltage within a small specified range.

The TPS51275RUKR has two variable resistors that can be used to set the output voltage. The bottom resistor adjusts the output voltage to a nominal range (up to 15V), while the top resistor is used to fine-tune the voltage to a specific level. The output voltage can also be adjusted by changing the switching frequency of the regulator. The switching frequency is adjustable over a range of 0.5kHz to 2 MHz, so designers can select the optimal frequency for their application.

In addition, the TPS51275RUKR includes over-voltage and over-current protection, which help prevent any damage caused by excessively high voltages or currents. This feature is especially important in high-current applications, such as those found in industrial and automotive systems.

The device also provides a low-noise, low-ripple output for sensitive applications. It is designed to provide high efficiency and low power consumption, making it well-suited for battery-powered systems. The TPS51275RUKR is also highly reliable, with a life expectancy of over one million hours.

Conclusion

The TPS51275RUKR is an advanced voltage regulator that offers a high-efficiency, low-noise, and reliable power solution. With its adjustable output voltage range, programmable over-current and over-voltage protection, and adjustable switching frequency, it is designed for a wide range of applications requiring precision voltage regulation and low quiescent current. The device is available in a compact SOT-23E package, making it an ideal choice for space-constrained applications. Thanks to its high efficiency, low power consumption, and long life expectancy, the TPS51275RUKR is an excellent choice for low-power, low-profile systems.

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