ADP2140ACPZ3328R7

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PMICs (power management integrated circuits) are used to manage the power supply in almost all modern electronic systems. Voltage regulators are one class of PMICs, and they are used to provide the required voltage level for many applications. Linear and switching regulator ICs are two different types of voltage regulator ICs.

The ADP2140ACPZ3328R7 is a precision, low-dropout linear regulator in a 16-pin QFN package, designed with high accuracy, low noise and low supply current. It is designed to provide a regulated output voltage of 0.8V to 3.3V. It can deliver a maximum output current of 1A, with a typical load regulation of 50 mV and an output noise of 25 uVrms from 10Hz to 100 kHz. It also offers a very low quiescent current (only 1.2µA).

Application Field

The ADP2140ACPZ3328R7 is suitable for a wide range of applications, such as voltage stabilization in digital systems, automotive, medical, physical interface control systems, sensors, and robotics. Because of its high accuracy and low output noise, it is particularly suitable for powering digital circuits.

Working Principle

The ADP2140ACPZ3328R7 uses a low dropout (LDO) linear regulating architecture to provide a regulated output voltage. It features a voltage reference, an error amplifier, a P-Channel MOSFET, a driver amplifier and an output filtering capacitor for its working. The voltage reference provides a constant reference voltage for comparison, the error amplifier amplifies the difference between the reference voltage and a feedback signal from the output, and the P-channel MOSFET acts as a switch between the input voltage and the output voltage. The driver amplifier sends appropriate signals to the MOSFET for controlling the current flow, and the output filtering capacitor filters out ripples from the output voltage.

These components together allow the regulator to maintain a stable output voltage, even when the input voltage varies or the load current changes. The output voltage is set by an external resistor divider, which allows the user to easily adjust the output voltage. The regulator is protected against short circuit, over temperature, and over current.

In summary, the ADP2140ACPZ3328R7 is a high-accuracy, low-dropout linear regulator with low output noise, making it an ideal choice for a wide range of system applications.

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