MPQ2451DT-AEC1-LF-Z

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PMIC - Voltage Regulators - DC DC Switching Regulators

The MPQ2451DT-AEC1-LF-Z is a DC/DC switching regulator N-Channel MOSFET. It is a pulse width modulated (PWM) step-down Q-Series non-synchronous device. It is specifically designed to provide high efficiency, low noise operation and flexibility. The MPQ2451DT-AEC1-LF-Z is ideal for automotive applications that require low power dissipation, high efficiency and small size.

Application Field

The MPQ2451DT-AEC1-LF-Z can be used in a variety of applications such as automotive, industrial and consumer power supply, CD/DVD players, cellphones, smartphones, tablets, etc. It can also be used in solar, battery and fuel cell powered devices, as well as portable and semi-portable applications. Furthermore, it is suitable for use in data acquisition, monitoring and control systems.

Working Principle

The MPQ2451DT-AEC1-LF-Z operates as a DC-to-DC switching regulator, controlling the output voltage by regulating the switching frequency and duty cycle of the MOSFET. It contains two MOSFETs in a single package, the main switching MOSFET and the synchronous MOSFET. The main switching MOSFET is controlled by the internal PWM controller and driver, while the synchronous MOSFET is controlled by an external PWM signal. The synchronous MOSFET performs the current buck, controlling the current flow to the output. The main switching MOSFET is responsible for the power conversion process, resulting in the output regulation.

The MPQ2451DT-AEC1-LF-Z is equipped with a hysteretic control loop which keeps the switching frequency constant during the light and full load conditions, thus improving the efficiency and reducing the output noise. When an external PWM signal is present, the hysteretic control loop is overridden and the operating frequency is set by the external signal.

The device is also equipped with several protection features such as over-temperature protection, overvoltage protection and short circuit protection. Additionally, the device has an output voltage tracking function which allows it to track an external signal and adjust the output voltage accordingly.

Conclusion

The MPQ2451DT-AEC1-LF-Z is a highly efficient DC/DC switching regulator which is specifically designed for automotive applications. It offers low noise operation, high efficiency, flexibility and protection features. Its hysteretic control loop keeps the switching frequency constant, while the output voltage tracking function allows it to track an external signal and adjust the output voltage accordingly. The MPQ2451DT-AEC1-LF-Z is suitable for use in a variety of applications including automotive, industrial and consumer power supply, CD/DVD players, cellphones, smartphones, tablets, etc.

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