MP28266DL-LF-P

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MP28266DL-LF-P is a high-performance two-stage DC-DC synchronous buck converter, featured with a 10A/4.5A constant current capability, a wide input voltage range of 8V to 36V, and a fixed operating frequency of 4MHz, making it suitable for many applications. It combines the best of both worlds of efficiency and circuit robustness. By using it, designers can create all the necessary power supplies without the need for complicated additional circuitry. The device also offers a variety of protectionfeatures, making it an ideal choice for applications requiring high power density and good power integrity.

Application Field

MP28266DL-LF-P is designed to power very high-current processing engines and other components, such as FPGAs, GPUs, microcontrollers, high-resolution cameras and otherprovide precision motor control and system-level power management. It can be used in consumer electronics and industrial automation applications that require low-noise power supplies. This DC-DC converter offers improved system performance and reliability by offering a wide 10V to 36V input voltage range anda wide 4.0A to 10A output current range. Moreover, it provides flexible voltage programming, current monitoring, and protection features.

Working Principle

MP28266DL-LF-P consists of a high-speed switch mode buck converter circuit and a linear control circuit. Its primary switching converter is based on the PWM controller, and is provided with a 4.5A internal low side FET (FET1) and a 10A external low side FET (FET2). The peak current of each output is limited to a maximum value, as determined by the peak current sense input “Peak CS” and the external 0.1Ω current sense resistor RCS. The maximum output current is then monitored by the Current Sense Voltage “CSV” on the FET1 side.

The output voltage of the Buck Converter is adjusted via the “DV” pin, either by an external resistor divider or the internal programmable voltage reference circuit. When the voltage of the “DV” pin exceeds 200mV, the regulator then enters the PWM control mode. In this mode, the current that the PWM controller will deliver is determined by the current sense signal, which is generated by the “CSV” pin voltage and the external current sense resistor RCS. As the current consumption increases, the output of the “CSV”pin will increase, and the PWM controller will adjust the output voltage accordingly, to reduce the power consumption.

In the case of an overload, the MP28266DL-LF-P can be configured to shut down or reduce the output current to a safe level. This is achieved by the Thermal Creeping Protector, which monitors the junction temperature of the LDO, and can force the output voltage to reduce to a safe level should the temperature exceed a preset threshold. In addition, the device includes extensive protection features, such as over-voltage protection, current limit, and over-temperature protection, making it suitable for applications requiring high power and system reliability.

Conclusion

The MP28266DL-LF-P is a high-performance two-stage DC-DC synchronous buck converter, designed to power very high-current processing engines, FPGAs, GPUs, microcontrollers, high-resolution cameras and other computing peripherals. Provided with high efficiency, wide input voltage range, and a variety of protection features, it is an ideal choice for power-demanding applications. By procuring this device, you can create a reliable and cost-effective power supply for your complex system.

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