FAN5307SX

Voltage - Output (Min/Fixed):	0.7V
Base Part Number:	FAN5307
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	300mA
Voltage - Output (Max):	4.4V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction to FAN5307SX

The FAN5307SX device is a simple 2A, step-down switching voltage regulator, specifically designed for a wide range of applications requiring high efficiency, simple operation and low component count. The FAN5307SX control IC integrates a wide input range, fixed-frequency, and low-cost design, making it ideal for general-purpose applications ranging from 5V to 16V. This voltage regulator is part of the PMIC - Voltage Regulators - DC DC Switching Regulators family and has several advantages compared to other switching regulators in its class.

Features and Benefits

The FAN5307SX switching regulator offers several advantages over other regulators in its class. This IC integrates an internal dual current sensing amplifier, a voltage feedback amplifier, an integrated high-side switch, andBoost active clamp circuitry, all of which help reduce component count and design complexity. The integrated control loop of the FAN5307SX device also optimizes the overall efficiency of thestep-down regulator and make it suitable for low-power, low-noise applications. Additionally, the device offers a wide input range of 3.3V to 16V, anda maximum output current of 2A, making it easy to design with.

Application Field and Working Principle

The FAN5307SX Voltage Regulators from PMIC - Voltage Regulators - DC DC Switching Regulators is most commonly used for high-efficiency, low-noise and low-cost applications, such as Tablet computers, DSCs and other portable digital devices. This device operates as an step-down switching regulator producing an output voltage much lower than the input voltage, allowing the output voltage to drive into low voltage devices.The FAN5307SX device uses a Pulse-Width Modulation (PWM) scheme to regulate output voltage. When the control loop senses a voltage drop in the output the PWM duty cycle is increased by turning the low-side switch on for a longer duration, increasing the output current. This cycle continues until the output is regulated at the desired voltage, at which point the duty cycle stops changing.In addition, the device has safety features such as over-current protection, over-temperature protection, as well as soft-start to ensure the device is operated within its limits. It also supports external synchronization to allow frequency synchronization with other ICs.

Conclusion

The FAN5307SX device from PMIC - Voltage Regulators - DC DC Switching Regulators is a highly-efficient, low-noise and low-cost 2A step-down switching voltage regulator. The device integrates a wide input range, a fixed-frequency design and several safety features. This makes it suitable for a wide range of applications such as products for the industrial, medical, and automobile markets.

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