TPS54427DRCT

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The TPS54427DRCT is a synchronous-rectifier buck DC/DC converter with a fixed 3.3 V output voltage. It is part of the TPS54xx series of integrated circuits for non-isolated voltage regulation that includes a buck switching regulator, a high-current low-resistance MOSFET, and a current limit resistor. The TPS54427DRCT is optimized to provide a 3.3 V output at up to 40 amps of continuous output load current, making it suitable for powering high-current, next-generation computing and graphics applications. It is also designed to help reduce power dissipation while allowing designers to take full advantage of its low-side MOSFET and current limit resistor.

Application Field

The TPS54427DRCT is suitable for a wide range of applications, including data centers, computers, graphics cards, and embedded systems. It can regulate input voltages up to 12 V, supporting a wide range of high-current loads. It is also ideal for applications that require a fixed output voltage, such as powering FPGA, DSPs, and other digital and analog circuits. In addition, the TPS54427DRCT has the capability to provide an adjustable output voltage, which is ideal for applications that require an adjustable output voltage. The high input voltage flexibility and excellent load regulation make it ideal for powering high-current systems without the need for external components.

Working Principle

The TPS54427DRCT is a two-phase buck converter, using both high-side and low-side FETs. A switching frequency of 600kHz is used, allowing for the use of a small-sized inductor. An external PWM signal is used to control the switching frequency of the device. The output voltage is set by connecting an external incoming voltage to the ON/OFF pin. As the ON/OFF pin is left floating, the onboard adjustment voltage VREF is used to set the output voltage to a fixed 3.3V. The TPS54427DRCT also supports low-side synchronous rectification, which helps improve efficiency for high-current power supplies. The device includes a programmable current limit which allows for the protection of the MOSFETs against overloads and short circuits. The device also has a built-in soft-start feature which ramps up the output voltage slowly as the load is applied to the converter.

Conclusion

The TPS54427DRCT is a high-performance buck DC/DC converter designed to power high-current, next-generation computing and graphics applications. It is suitable for a wide range of applications, including fixed output voltage digital and analog circuits, and adjustable output voltage applications. It uses a 2-phase buck conversion technique and a fixed 3.3 V output voltage, supporting up to 40 amps of continuous output load current. It has a built-in current limiter, programmable OVP, and a soft start feature. The TPS54427DRCT is an ideal solution for powering high-current loads without the need for external components.

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