MCP16322T-ADJE/NG

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The MCP16322T-ADJE/NG is a versatile and cost-effective 3A synchronous step-down DC-DC converter with an adjustable output voltage. It is usually classified with the family of PMIC-Voltage Regulators-DC DC Switching Regulators. This article focuses on the application field and working principle of the MCP16322T-ADJE/NG.

Application Field

The MCP16322T-ADJE/NG is suitable for different applications requiring stringent output voltage regulation with both good line and load transient responses. It is widely used in the power supply system of the consumer products or embedded applications such as mobile phones, set-top boxes, gaming consoles and smart TVs. The MCP16322T-ADJE/NG particularly excels in systems with limited space and output voltage requirements.

Working Principle of MCP16322T-ADJE/NG

The basic working principle of the MCP16322T-ADJE/NG is that it regulates the output voltage through a closed-loop control system. The system is composed of the power MOSFET, sense resistor, inductor, output capacitor, error amplifier, and oscillator. The power MOSFET works with the inductor in a buck topology to efficiently step-down the input voltage to the required output voltage. The current begins with the oscillator which sets the frequency for the switching of the power MOSFET. Then the voltage across the sense resistor is compared with the reference voltage from the error amplifier. The system adjusts the duty cycle of the power MOSFET in response and further modulates the output voltage through the feedback loop and compensating components. This feedback loop will continuously adjust the output voltage and ensure the stability of the system.

Safety Operation

The MCP16322T-ADJE/NG also has built-in safety features to prevent failure in the system. It has under-voltage lockout (UVLO) which reduces power consumption in shutdown mode while also preventing the regulator from starting without sufficient input. In addition, it also has over-current protection (OCP) which senses the inductor current while monitoring it with the internal current-limited error amplifier. With the OCP, if the current exceeds a preset limit, the power MOSFET is shut off and the regulator will enter a non-latching fault mode.

Conclusion

The MCP16322T-ADJE/NG is a versatile and cost-effective 3A synchronous step-down DC-DC converter with an adjustable output voltage, suitable for different applications requiring stringent output voltage regulation with both good line and load transient responses. It is widely used in the power supply system of consumer products or embedded applications such as mobile phones, set-top boxes, gaming consoles, and smart TVs. It also has a number of built-in safety features like under-voltage lockout and over-current protection which helps to protect the system from any unexpected failures.

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