TPS54354PWPG4

TPS54354PWPG4 Application Field and Working Principle

The TPS54354PWPG4 is a Single, 2A, 4-switch transition-mode synchronous buck regulator (TSR) designed for high-efficiency, high-density point-of-load (POL) buck power applications. It features a buck voltage regulator capable of output voltage- and current regulation up to 3.63V, with a range of 0.6V to 5.5V. It deploys current-mode PWM control and a buck switching frequency from 200kHz to 1.3MHz to induce high-efficiency, low output voltage ripple, and smooth transition times. The TPS54354PWPG4 buck regulator provides best-in-class transient response and fast short-circuit protection, as well as thermal protection to protect the device and load in the event of an overload. It also includes comprehensive programmability and 100nA low-power quiescent current that helps reduce the total power consumption of the system.

Application Field

The TPS54354PWPG4 is suitable for a wide range of high-density point-of-load (POL) buck power applications, including servers, mobile phones, tablets and other battery powered applications, as well as industrial, networking and home-automation products. It can be used for the step-down conversion of voltages from 2.8V to 5.5V to output voltage ranges from 0.6V to 3.63V.

Working Principle

The TPS54354PWPG4 is equipped with an on-board, high-efficiency Buck Switcher to regulate the output voltage. The device has four switches, which can be controlled by the on-board PWM to vary the output voltage. The four switches are connected in a bridge configuration with the input voltage, and the output voltage is taken from the point in the middle of the bridge where the four switches converge. The output voltage of the device is regulated by controlling the four switches. The incoming voltage is alternately switched between the two terminals of the output node by the four switches, and the difference between the two voltages is the output voltage.

The TPS54354PWPG4 features an Integrated Switch-Mode PWM Controller that provides optimal control of the buck switcher, and can be programmed accordingly. It uses a current-mode control architecture to regulate the output voltage. It uses the switching frequency of the switches to control the output voltage. The PWM controller has multiple control loops, including synchronization detection, slope compensation, soft start and output over-voltage protection.

The TPS54354PWPG4 also includes a number of power components to make the device more robust, including an internal power MOSFET, a current-sense resistor and a compensation network. All these components work together to ensure efficient and stable operation of the device.

Conclusion

The TPS54354PWPG4 is an advanced single, 2A, 4-switch transition-mode synchronous buck regulator (TSR) designed for a wide range of high-density, point-of-load (POL) buck power applications. Its buck voltage regulator is capable of output voltage- and current regulation up to 3.63V, with a range of 0.6V to 5.5V, and it has a wide switching frequency range from 200kHz to 1.3MHz. This highly sophisticated buck regulator also incorporates programmability, 100nA low-power quiescent current and fast short-circuit protection, making it ideal for all kinds of POL applications, such as servers, mobile phones and tablets, as well as industrial, networking and home-automation products.