TPS51275BRUKT

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The TPS51275BRUKT is an integrated synchronous buck converter specifically designed to reduce an input voltage down to a lower adjustable output voltage. It widely used in a vast range of applications, such as computer system, HPC and mobile device charging, automotive, telecommunications, and low voltage industrial. It provides up to 3A output current and is offered in a thermally enhanced, space-saving TSSOP-16 package 18. This page will introduce the application field and working principle of the TPS51275BRUKT.

Application Field

The TPS51275BRUKT is a voltage regulator with high efficiency, low ripple, and excellent line and load transient response. This device provides most of the features to support system design, such as an adjustable output voltage, programmable soft-start, and an external synchronous rectifier enable. The device can operate from a wide input voltage range from 4.5V to 20V, but the maximum output voltage is limited up to 5V. Using a proper combination of inductor, VIN, and output capacitors will also affect the TPS51275BRUKT performance.

Working Principle

The TPS51275BRUKT is a current mode synchronous buck converter. The key features of the device include pulse width modulation (PWM) control, adjustable output voltage, programmable soft-start, and an external synchronous rectifier enable pin. The PWM control keeps the output voltage steady with minimal ripple and fast transient response. Additionally, the circuit also includes an output voltage monitor to provide real-time feedback and precise output voltage regulation.The device operates with a 2MHz fixed frequency clock. When input voltage increases, the output voltage drops. To restore the output voltage to its set point, the pulse width modulator then increases the duty cycle until the original voltage is reached. The external synchronous rectifier enable pin is used for additional power efficiency. When the enable pin is grounded, the buck converter operates with a low frequency synchronous rectifier and a higher efficiency can be obtained.

Conclusion

The TPS51275BRUKT is an integrated buck converter, integrating high-efficiency step-down regulator designed to reduce an input voltage down to a lower, adjustable output voltage. The device features an adjustable output voltage, programmable soft-start, and an external synchronous rectifier enable pin, making it suitable for a wide variety of applications. Additionally, the device also includes an output voltage monitor to provide real-time feedback and precise output voltage regulation.

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