TPS54810PWP

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TPS54810PWP is a non-synchronous buck voltage regulator, primarily used in DC-DC power-supply and point-of-load conversion applications. It features high efficiency, low operating current, and low noise in a small package. The TPS54810PWP includes an internal high-side and low-side MOSFET, a current-mode control architecture, an internal compensation network, simple external circuitry, and a programmable Soft-Start feature that sets the output voltage ramp rate.

Application Field

The high efficiency, low quiescent current, and low noise make the TPS54810PWP a good choice for use in applications such as automotive electronics, communication and computing equipment, office automation, audio, instrumentation and medical equipment. The TPS54810PWP is well-suited for applications such as powering high-power LEDs, super-capacitors, and other power supplies in telecom and communication systems.

Work in Principle

The TPS54810PWP uses a current-mode control architecture and an integrated low-side and high-side MOSFET. The output voltage is programmed by varying the voltage on the FB pin. The internal regulation loop drives the Error Amplifier output to regulate the output voltage to the programmed value. The current-mode control loop senses the output current through an internal sustained current limiter. As the output voltage approaches the programmed target, the Internal Loop Gain reduces and the output voltage settles quickly and accurately.

The TPS54810PWP enables superior transient response with its high-bandwidth current-mode control loop. The wide bandwidth of the loop provides an excellent and fast response to the load steps and loads transients, resulting in better system performance. The output ripple and noise is minimised due to the fast response of the control loop. The current-limiter helps to protect against shorted outputs or output capacitors that become high-impedance during overload.

The TPS54810PWP has a programmable Soft-Start feature that sets the output voltage ramp rate. Soft-Start helps to eliminate start-up to reduce ripple, limit inrush currents and limit over voltage transients. The TPS54810PWP also has an internal soft-start threshold of 480mV that limits maximum output current until the output voltage is above this threshold.

The TPS54810PWP is designed for simple circuit implementation with an internal compensation network and external loop compensation. The correct compensation for the output voltage and load transient characteristics is optimized by selecting the resistor and capacitor values for the external compensation network.

The TPS54810PWP also includes an integrated Under-Voltage Lockout (UVLO) circuit with programmable thresholds to make sure that the device only operates when the output voltage is above the predetermined threshold. This feature helps to avoid overloading the power supply and ac-dc converters by providing the necessary protection against unwanted starts or during ac-dc converter failure.

Conclusion

The TPS54810PWP is an excellent non-synchronous buck voltage regulator that can be used in a wide variety of DC-DC power-supply and point-of-load conversion applications. It features high efficiency, low operating current, and low noise in a small package. The TPS54810PWP also has a programmable Soft-Start feature, an integrated UVLO circuit, and an internal compensation network, making it easy to design with. It is well-suited for applications such as powering high-power LEDs, super-capacitors, and other power supplies in telecom and communication systems.

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