TPS54550MPWPREP Integrated Circuits (ICs)

PMIC - Voltage Regulators - DC DC Switching Regulators

The TPS54550MPWPREP is a dual-phase, synchronous buck voltage regulator for applications requiring very high efficiency and output current capability up to 12A. The device is designed to drive a wide range of microprocessors from 4.95V to 0.40V and has a wide input voltage range of 4.5Vin to 14Vin. The TPS54550MPWPREP provides advanced digital PMBus control interface, ideal for systems that require tight regulation and high power density. The device achieves better than 95% efficiency across entire load range and has very low quiescent current of less than 50uA.

Application Field

TPS54550MPWPREP digital DC-DC converters are ideal for powering high-performance digital signal processing (DSP) and microcontrollers. Examples of their applications include servers, networking equipment, storage equipment, telecom systems, graphics applications, gaming systems and unmanned aerial vehicles. Additionally, the device suits system configurations requiring two independent regulators powered from the same input, such as powering a high voltage DSP and memory from a 5V supply or powering a DDR memory system from a 12V supply.

Working Principle

The TPS54550MPWPREP is a pulse width modulation (PWM)-based, fully integrated synchronous buck voltage regulator. The two phases of output current reduction are triggered by an internal factory programmed current limit adjust direction command from the PMBus. This signal turns off one phase while the other simultaneously turns on, hence reducing one phase’s output current while the other phase maintains the total load current and output voltage. This process is repeated thousands of times a second, further improving the efficiency of the converter.

The TPS54550MPWPREP operates under supply voltages of up to 14 V and provides differential remote sensing capability to ensure accurate output voltage regulation. An internal digital controller monitors and regulates the output voltage, optimizing power stages efficiency at each operating point while providing digital PMBus control and telemetry. Its flexible diagnostics and margining help protect the system from power-supply related damages and increase system reliability.

The TPS54550MPWPREP uses an array of ON-Resistance power MOSFETs and is capable of delivering up to 12A of continuous output current with excellent thermal performance. The device is designed to protect the system from power-supply related anomalies such as over voltage, under voltage, over current, over temperature, and reverse current.

Conclusion

The TPS54550MPWPREP is an efficient, high-power dual-phase synchronous buck voltage regulator which is ideal for server, storage, and telecom systems. It is capable of delivering up to 12A of continuous output current and provides advanced digital PMBus control and remote sensing capabilities. Its on-resistance power MOSFETs have very low thermal resistance, and its flexible diagnostics and margining allow the system to be protected from power-supply related damages and increase reliability.