FAN53555UC08X

Voltage - Output (Min/Fixed):	0.6V
Base Part Number:	FAN53555
Supplier Device Package:	20-WLCSP
Package / Case:	20-UFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.4MHz
Current - Output:	4A
Voltage - Output (Max):	1.23V
Series:	TinyBuck®
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Programmable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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FAN53555UC08X Application Field and Working Principle

Introduction

The FAN53555UC08X is an integrated circuit designed for DC-DC conversion applications. This device is a high efficiency, low noise step-up DC-DC converter that can be used in portable devices such as cell phones, digital cameras, and personal digital assistant (PDA)s. It can be used for battery operation and power management for small digital products. It is designed to operate as a boost converter, implementing synchronous rectification for increased efficiency and improved noise immunity over standard diode rectification. The device is capable of providing a constant output current and voltage with no additional control components.

Application Field

The FAN53555UC08X is suitable for any system that requires a steady, high voltage and high current output. Common applications include battery charging circuits, portable device power management, small mobile and embedded applications, and PC power supplies. The device can also be used in low to medium power converters such as LCD panels and LED lighting.

Device Advantages

The FAN53555UC08X offers many advantages over competing devices. It is highly efficient in boosting low voltage input sources up to 5.5V or higher, making it ideal for providing a reliable source of power to small portable devices. The device also employs synchronous rectification for improved efficiency and improved noise immunity over standard diode rectification. The device is capable of providing up to 3.2 A of output current with no additional control components, allowing for a compact and simplified circuit design.

Working Principle

The FAN53555UC08X works to boost low voltage input sources up to 5.5V or higher through the use of synchronous rectification. The device works by first applying the input voltage to a switch – either a FET or a BJT. The switch then acts as a bridge between the input voltage source and the output voltage. When the switch is closed, it increases the output voltage while reducing the current drawn from the input source. This process is repeated until the desired output voltage is reached.The synchronous rectification ensures that only one voltage switch is active at any given time, which increases the efficiency of the device and reduces power losses. The device also includes a number of protection mechanisms to ensure safe operation. These include over-voltage protection, over-temperature protection, and over-current protection.

Conclusion

The FAN53555UC08X is an integrated circuit designed for DC-DC conversion applications. It offers many advantages over competing devices, such as high efficiency, low noise, and synchronous rectification. The device is capable of providing up to 3.2 A of output current with no additional control components, allowing for a compact and simplified circuit design. It is suitable for any system that requires a steady, high voltage and high current output, such as battery charging circuits, portable device power management, small mobile and embedded applications, and PC power supplies.

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