FAN53528DUC40X

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FAN53528DUC40X belongs to a type of DC-DC switching regulators which are integrated circuits used primarily for regulating voltage in electronic circuits. It is a low noise, low input capacitor, high efficiency, step-down DC/DC converter from Fairchild Semiconductor. The device is optimized for applications such as multiple load devices, hard disk drives, DDR memory supply power, LCD backlight driver, set-top box and digital video recorder.

It is manufactured on Fairchild Semiconductor’s 40V process and is available in a very small 4*4 QFN package. This device has a maximum input voltage of 40V, input voltage range of 3.0V to 40V, output ranges of 2.5V to 19V and an adjustable switching frequency up to 2.2MHz. It also features an integrated 80mΩ N-channel MOSFET, allowing up to 2A of output current and a programmable soft-start time.

The working principle of FAN53528DUC40X is based on the flyback converter topology. When the EN pin is enabled, the internal MOSFET is turned on and the inductor, connected between the VIN and VOUT pins, stores energy and creates an output voltage. When the MOSFET is turned off, this energy is then released in the form of an output voltage. The device utilizes an integrated low-dropout voltage regulator for the internal bias voltage and has a low shutdown current of <2uA.

FAN53528DUC40X is mainly used for industrial control applications and medical devices such as control of hot water systems, medical equipment, and other industrial gadgets. It is also widely used in automotive, home appliances, computer, PDAs and other products.

It provides a high switching frequency of 2.2MHz and a wide input voltage of 3V to 40V, making it suitable for multiple load devices. The device is also designed with an internal compensation, feedback loop and soft-start time, allowing it to be used with very low output capacitance values. This greatly reduces the overall size of the circuit, making it suitable for tight space applications. In addition, the FAN53528DUC40X operating temperature range ranges from -40°C to +85°C, making it an ideal choice for a variety of industrial applications.

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