IR3564MBTR1PBF

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The IR3564MBTR1PBF is a part of PMIC—Voltage Regulators—Special Purpose. It is a synchronous buck converter with current-mode control. The device includes two internal synchronous buck converters, each with two different channel outputs. It offers a high efficiency solution with a small footprint. It also provides an integrated internal-driven MOSFET in an industry-standard 0.75mm2, RoHS-compliant package.

The IR3564MBTR1PBF application field includes various kinds of power supplies providing single output and multiple output solutions: The single output application is for VRD 11, BC1.2 and PCIe cards as well as 3.3V and 5V power supply, while the multi-output application is for notebook computers’ 1.5V-1.95V applications. All of these power supplies use the IR3564MBTR1PBF to implement voltage conversion from the 8V to 36V (or 9V to 15V) supply rails.

The IR3564MBTR1PBF working principle is based on a synchronous buck converter, which can regulate the output voltage range from 0.6V to 3V, resulting in a high efficiency system. There are two distinct sets of power-gating power MOSFETs and regular power MOSFETs in the device. To begin with, the external bias voltage is used to power the main power MOSFETs, which are then connected to the input voltage rail. At the same time, a high-frequency PWM signal is received from the external controller, powering the control circuitry in the device and providing regulation of the output voltage.

The device is controlled and powered by the internal-driven MOSFET, which provides an over-current protection function. It also includes full protection features such as power-on reset, over-voltage protection, under-voltage lockout, and thermal shutdown.

The IR3564MBTR1PBF has an integrated shielded inductor with a 1uH output inductor, which minimises the total solution size. Additionally, the device can handle an output peak current of 10A, making it suitable for a wide range of applications.

In conclusion, the IR3564MBTR1PBF is an efficient and compact device for the implementation of the synchronous buck converters, offering protection features such as over-current and over-voltage protection. Its application field includes single- and multi-output solutions for a wide range of power supply systems from 3.3V to 36V.

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