LTC1473CGN#PBF

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PMIC (Power Management Integrated Circuitry) is a class of integrated circuits (ICs) whose primary purpose is to manage the power distribution within a circuit or system. OR controllers are a subclass of devices that enable the user to control the power states of the system devices. Ideal diodes are components used to generate a voltage regulation level with improved efficiency. The LTC1473CGN#PBF is an example of such a device.

LTC1473CGN#PBF Application Fields and Working Principle

The LTC1473CGN#PBF is a dual OR-controller with an integrated ideal diode from Linear Technology. The device has two independent OR controllers each featuring an external NMOS transistor and shutdown control. The OR controller and ideal diode have separate enable pins that allow the user to independently enable or disable each output. The OR controller facilitates a low dropout (LDO) voltage regulation level that eliminates the need for a conventional diode and its associated power losses.

The LTC1473CGN#PBF is used in applications such as AC/DC and DC/DC converters. It can be used in combination with the N-channel MOSFET to provide superior efficiency, compared to conventional limited diodes and their associated power losses. Its designed to achieve a low dropout voltage of 0.12V, providing up to 90% power savings over traditional solutions. Additionally, its adjustable gate voltage control allows for precise and repeatable power regulation. The device features a range of protections such as over-temperature, short-circuit and over-current protection, making it an ideal choice for applications with high reliability requirements.

The working principle of the LTC1473CGN#PBF is based on the OR controller. The OR controller contains a low side N-channel FET with an external gate voltage. The device monitors the input voltage and adjusts the gate voltage of the N-channel FET to maintain a constant LDO voltage. If the input voltage is higher than the LDO voltage, the gate voltage is driven low to shut off the FET, and the input voltage passes through the ideal diode without any power loss. If the input voltage is lower than the LDO voltage, the gate voltage is driven high and the N-channel FET turns on, providing an output voltage with minimal voltage drop.

With its low-power design and wide range of protection features, the LTC1473CGN#PBF is an ideal choice for applications requiring reliable and efficient power regulation. Its high efficiency, adjustable gate voltage control, and low dropout voltage make it a great solution for AC/DC and DC/DC converters.

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