FAN53611AUC18X

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The FAN53611AUC18X is a fully integrated, high-performance, high-efficiency, DCDC synchronization step-down switch mode power supply. It uses a high-frequency sinusoidal pulse-width modulation (PWM) control scheme to deliver up to 18 A output current at 3.2 V to 5.5V Input voltage range while forcing the output voltage down to an adjustable voltage. The integrated switching scheme, allowing up to a 95% efficiency, a current-mode PWM control, and a unique enable pin architecture are the key features paving the way to superior performance and simplicity.

Application field

The FAN53611AUC18X is intended for use in a wide range of applications, including: handheld, mobile, notebook computers, power converters, DCDC buck converters, server and telecom power, automotive, and aerospace vehicle power and industrial control systems.

The FAN53611AUC18X is also suitable for high-power designs and applications due to its unique thermal and current-limiting simultaneous protection, which ensures the device will not be damaged or have any performance or reliability degradation when operated in high-power conditions.

Working principle

The FAN53611AUC18X DCDC switching regulator is based on a current-mode, high-efficiency PWM control system. Its high-frequency sinusoidal pulse-width modulation (PWM) control scheme provides significantly higher efficiency levels, with up to 95% efficiency, and improved transient response.

The switching transitions of the FAN53611AUC18X are synchronized with a fixed frequency clock, allowing the input voltage, output voltage, and output current all to be programmed via external resistors. This feature gives design engineers the ability to fine-tune external programming of the device, allowing for improved power performance and regulation.

The FAN53611AUC18X also has a unique enable pin architecture which provides flexibility to enable or disable multiple switches, allowing users to achieve a more fine-grained approach to voltage control and power management. This feature of the FAN53611AUC18X is particularly valuable for saving power when in low-power mode.

The FAN53611AUC18X also features short-circuit protection, over-current protection (OCP), over-voltage protection (OVP), internal thermal shutdown (TSD) protection, and a unique current-limiting and thermal protection (CLTs) to protect against thermal degradation and abuse.

The FAN53611AUC18X is a high-performance, high-efficiency, regulated DCDC converter with a wide range of features that allow for a wide range of operation and applications. From a design point of view, the FAN53611AUC18X is particularly well suited for high-power designs and applications, due to its unique thermal and current-limiting simultaneous protection, allowing it to operate in high-power conditions without any detriment to performance or reliability.

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