ADP2370ACPZ-3.0-R7

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PMIC (Power Management Integrated Circuit) is a type of integrated circuit which is used to manage the intentional distribution, conversion, and control of electrical power. Voltage Regulators are a type of electrical devices that regulate voltage levels, while DC DC Switching Regulators are even more specific types of regulators that are used to convert direct current input voltage into other voltage outputs. Accordingly, the ADP2370ACPZ-3.0-R7 is a type of DC DC Switching Regulator whose application, field, and working principle, is detailed below.

Application Field

The ADP2370ACPZ-3.0-R7, is a DC-DC step-down (buck), synchronous, (1) switching regulator, with 800mA thermally limited output current, (2) and is primarily used in, boost and buck-boost applications. This integrated device can also (3) be adapted to, additional circuit configurations, such as flyback converters, in which, the portion of the circuit is used as a synchronous, rectifier (FETs).

Specifically, this integrated device is designed to be a long-life, easy-to-use solution to mobile power management and power regulation. Generally, it is utilized in applications that require a stable, low-noise voltage power supply. Some of these devices are used to provide power to mobile phones, PDA’s and other portable communication devices. Other applications include, power supplies for advanced peripherals, as well as automotive applications, such as dashboard instrumental systems.

Working Principle

The ADP2370ACPZ-3.0-R7 is a (4) synchronous, step-down (buck), (5) switching regulator that can provide high efficiency and low noise in designs that require high-precision, low-voltage outputs. This switching regulator features a High-side and Low-side PMOS FET (6) switch, along with current and voltage comparators, voltage reference, and a low-side gate driver, all integrated in the same package. It is capable of maintaining a regulated output voltage while operating over a wide range of input supply voltages. The device has (7) both fixed and adjustable switching frequency up to 2.2MHz, allowing operation over a variety of different conditions.

In operation, the device will (8) initiated the switching cycle when an input voltage is applied across the input pins. The high-side PMOS FET will then (9) turn on and draw current through the inductor, with the inductor accumulating energy throughout the cycle. During the cycle, the inductor stores the energy and when the cycle ends, the current through the inductor decreases, thus dropping the voltage across the inductor and (10) sending the stored energy to the output capacitor. The output capacitor then (11) filters the pulsing current into a steady voltage, providing a regulated output voltage.

Conclusion

To summarize, the ADP2370ACPZ-3.0-R7 is a DC DC Switching Regulator designed for use in a variety of mobile and automotive applications. The regulator utilizes synchronous buck conversion, high-side and low-side PMOS FETs, current and voltage comparators, voltage reference, and a low-side gate driver, in order to deliver high efficiency, low power consumption, and low noise in designs requiring precise, low-voltage power requirements. The adjustable switching frequency allows the regulator to be adapted to a range of different conditions.

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