MP2314SGJ-P

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PMIC - Voltage Regulators - DC DC Switching Regulators products play a very important role in modern electronic applications as it helps in efficiently managing the voltage in the circuits. The MP2314SGJ-P is one such product from Monolithic Power Systems (MPS) which is a highly integrated QFN packaged non-synchronous buck regulator. It is designed to be used with external components and can be used in a wide variety of industrial, consumer and computer applications. To understand its applications and working principle, let us look into the features of the device and how it works.

Features of MP2314SGJ-P

MP2314SGJ-P is a highly integrated buck regulator with features such as fixed 3.3V output voltage, current mode control, push-pull driver with internal protection circuitry. It is designed to have a wide input voltage range from 4.5V to 14V allowing it to be used in a variety of applications. The device supports +100V/-100Vmax VGS voltage and the built-in diagnostic function allows detection of an output overvoltage or an output overcurrent fault conditions. It also includes over-temperature, current-limit shutdown, and UVLO protections. The power supply rejection ratio (PSRR) is 98dB at 1MHz which is better than most of the conventional buck regulators.

Working Principle

The MP2314SGJ-P operates in a synchronous buck regulators as shown in the block diagram. A large input voltage is stepped down using two switches (the high side and low side switches). The low side switch is connected to the ground and the high side switch is connected to the input voltage. The output voltage is then regulated at a constant level. The controller used in the device is a current mode controller which operates by sensing the current through the inductor and controlling the duty cycle of the switches accordingly. The output voltage is regulated in the following steps:

• The current mode controller senses the current through the inductor and adjusts the duty cycle of the switches according to the output voltage.
• The low side switch is turned on and the current flows into the inductor.
• The current mode controller then turns off the low side switch and turns on the high side switch.
• The current stored in the inductor is now released to the output.
• The current mode controller then adjusts the duty cycle of the switches to regulate the output voltage.

Applications

The MP2314SGJ-P is suitable for use in a variety of industrial, consumer and computer applications. It can be used for powering various peripherals such as memory modules, FPGAs, MCUs and more, as well as powering a variety of audio and video components. The wide input voltage range allows the device to be used in applications where the input voltage can vary from 4.5V to 14V. The push-pull driver with internal protection circuitry allows for a robust and reliable operation. The PSRR of 98dB at 1MHz makes it ideal for use in applications where noise on the power rail is a concern. The device is also ideal for use in power supply modules due to its high efficiency and small size.

Conclusion

The MP2314SGJ-P is a highly integrated QFN packaged non-synchronous buck regulator from MPS which is suitable for a wide range of industrial, consumer and computer applications. The device operates by using two switches (the high side and low side switches) to step down a large input voltage and regulate the output voltage using a current mode controller. The push-pull driver with internal protection circuitry and the high PSRR of 98dB at 1MHz makes it an ideal solution for applications where reliability and noise on the power rail is a concern.

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