FAN1117AS285X

Voltage Dropout (Max):	1.2V @ 1A
Base Part Number:	FAN1117A
Supplier Device Package:	SOT-223-4
Package / Case:	TO-261-4, TO-261AA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	72dB (120Hz)
Current - Output:	1A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.85V
Voltage - Input (Max):	18V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

FAN1117AS285X is an adjustable linear voltage regulator designed to provide a cost-effective solution for applications requiring a low supply voltage. It features an adjustable output voltage range of 0.5V to 7.0V with a guaranteed output current of 1A. In addition, the device can provide a maximum output current of 5A with a rated input voltage of 5.5V. The output voltage is maintained by a feedback loop with a maximum output voltage accuracy of ±2%. The FAN1117AS285X is a 3-terminal positive adjustable regulator that can be used for various applications, ranging from low-noise supply voltage for audio equipment, to the precision power supply for industrial systems.

Application Field

The FAN1117AS285X is used in a wide range of applications such as portable electronics, battery-backed industrial instruments, automotive systems, and power supply systems. Its wide operating voltage range, flexibility, and low noise operation make it ideal for use in these applications.In portable electronics, the FAN1117AS285X is well suited for use as a main or auxiliary power supply, as it can provide both low noise and high efficiency. In addition, the device\'s high output current capability ensures that it can supply enough current to power higher-power devices.In industrial instruments and automotive systems, the FAN1117AS285X can be used to achieve more precise voltage regulation. Its output voltage regulation accuracy and precision allow for precise regulation of sensitive instrumentation, ensuring reliable operation even under varying conditions. Furthermore, due to its higher output currents, the device is capable of powering multiple circuits or loads in the same system.Finally, the FAN1117AS285X can be used in power supply systems as a reliable and cost-effective solution. Its wide input voltage range, flexible output voltage range, and low noise operation make it ideal for heavy duty industrial applications.

Working Principle

The FAN1117AS285X is a linear three-terminal adjustable voltage regulator that is designed to provide a stable, low noise power supply. The device works by sensing the voltage at its output terminal and comparing it to an internal reference voltage. If the output voltage is too low, the device will increase the output current. Conversely, if the output voltage is too high, the device will decrease the output current. This method of operation ensures that the output voltage is maintained to within the specified accuracy. The internal circuitry of the FAN1117AS285X is composed of an error amplifier, a voltage reference, and a power transistor. The error amplifier compares the difference between the output voltage and the internal reference voltage, and then adjusts the output voltage accordingly. The voltage reference circuit provides a precise and stabilized voltage reference which is used by the error amplifier to compare the output voltage. Finally, the power transistor is used to regulate the output current in order to maintain the output voltage as close as possible to the desired level.

Conclusion

The FAN1117AS285X is an adjustable linear three-terminal voltage regulator designed to provide an effective solution for applications requiring a low supply voltage. The device is ideal for use in portable electronics, automotive systems, and power supply systems. The wide input voltage range, flexible output voltage range, and low noise operation make it an effective and cost-efficient solution. Furthermore, its precise output voltage regulation ensures reliable operation even under varying conditions.

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