NCP1077ABP100G

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Power Management Integrated Circuits (PMIC) are used in various power control applications, such as AC/DC convesion, offline switchers, and more. The NCP1077ABP100G from ON Semiconductor is a low dropout positive and negative adjustable regulator with over current protection for AC/DC and battery-powered applications. It is designed with a low current dropout, high accuracy, and low EMI.

NCP1077ABP100G Application Field and Working Principle

The NCP1077ABP100G is used for a variety of AC/DC and battery-powered applications. It can be used in a wide range of applications, including telecommunications, audio amplifiers, portable and instrumentation systems, notebook computers, automotive systems, and more.

The NCP1077ABP100G uses an external divider network to set the output voltage. The output voltage range is adjustable from 1.5V to 9V. The typical dropout voltage at a load current of 100mA is below 300mV. The device also has over current protection which is triggered when the output current exceeds 1.2A.

The NCP1077ABP100G features two ports. The input port is used to supply the power from an AC or DC source. The output port is used to supply the output power. The device operates as a switched-mode regulator, i.e., it switches between on and off states to maintain the constant output voltage.

The device uses two transistors, one P-type field effect transistor (FET) and one N-type FET, for the switching action. A reference voltage is applied to the input side of the P-FET, and the output voltage is applied to the input side of the N-FET.

When the voltage at the output port is lower than the reference voltage, the FET is turned ON, resulting in a current flowing through the FET and the output port. This current is regulated by the P-FET and the voltage at the output port is maintained within the desired level.

When the voltage at the output port is higher than the reference voltage, the P-FET is turned off, resulting in a current flowing only through the N-FET. This current is regulated by the N-FET and the voltage at the output port is maintained within the desired level.

In summary, the NCP1077ABP100G is a low dropout positive and negative adjustable regulator with over current protection for AC/DC and battery-powered applications. It features low dropout voltage, high accuracy, and low EMI. It can be used for a wide variety of AC/DC and battery powered applications, including telecommunications, audio amplifiers, portable and instrumentation systems, notebook computers, automotive systems, and more.

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