TPS54355PWP

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TPS54355PWP Application Field and Working Principle

Power management integrated circuits (PMICs) serve as a critical component for many electronic systems because they provide a reliable, efficient, and low-cost solution for powering system loads. The Texas Instruments TPS54355PWP is a dedicated, highly efficient low-cost DC-DC synchronous buck converter, designed for high current and low voltage applications. This PMIC provides a high power conversion efficiency at high frequencies for applications such as industrial, computing and consumer markets.

Application Field

The TPS54355PWP is used in applications demanding a low cost, high efficiency switching power solution requiring a wide input voltage range. The high efficiency of the device makes it ideal for sub-5 V systems which require tight regulation including Ultrabooks, tablets, networking and communication systems. The TPS54355PWP also integrates a low RDS(on)ideal diode, providing a path to reduce power loss and extending battery life.

Working Principle

The TPS54355PWP synchronous Buck converter comprises two control loops to regulate the output voltage as well as the current delivered to the load. A low-noise PWM signal from the pulse width modulation (PWM) controller ensures a precise regulation of the output voltage over a wide range of output currents. An internal linear regulator provides the core voltage (VCC) supply rail to the internal logic, as well as keeping the current-sense amplifier, gate drivers and control logic supplied with a regulated supply, even during rapid load transients.

The TPS54355PWP uses a single switched voltage term with an integrated high-side MOSFET for increased power efficiency. A two-level input voltage monitoring feature allows for an extended input voltage range, making this device suitable for a wide range of input voltage sources. An internal compensation network provides the necessary parameters for stability without external components. The PMIC provides a thermal shutdown feature, protecting the device from operating temperature extremes.

Conclusion

The TPS54355PWP is a highly efficient, low-cost DC-DC synchronous buck converter designed for high current and low voltage applications, ideal for sub-5 V systems requiring tight regulation. Its integrated low RDS(on)ideal diode and extended input voltage range make it the choice for computing, industrial, and consumer markets.}The PMIC comes with an internal PWM controller and internal linear regulator; providing the necessary regulation while at the same time ensuring a precise regulation of the output voltage over a wide range of output currents.

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