FAN2514S28X

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FAN2514S28X is a step-down Linear voltage regulator created by Fairchild Semiconductor. It features various factors such as a fixed output voltage, low dropout voltage and low quiescent current. This product is applicable in a variety of applications such as mobile phone and other portable equipment, digital cameras, laptops and other consumer electronic products.

Features of FAN2514S28X

• Input voltage range up to 28V
• High output current up to 800mA
• Low dropout voltage
• Low quiescent current
• Fixed output voltage

Applications of FAN2514S28X

• Mobile phone
• Other portable equipment
• Digital cameras
• Laptops
• Consumer electronic products

Working Principle of FAN2514S28X

FAN2514S28X is a Linear step-down voltage regulator with a wide input voltage range of 4.5V up to 28V, and a fixed output voltage of 3.3V. It uses a low dropout voltage, typically 0.2V at 1A, and only requires a very small quiescent current of 250μA. This voltage regulator is compared to other typical linear regulators where the dropout voltage is two to three and more volts, and the quiescent current is in the order of 10mA.

The FAN2514S28X is internally made up of two stages, which simplified its implementation. The first stage uses a P-channel MOSFET as a pass element, while the second stage incorporates Linear regulation. This element ensures constant current output and regulation over a given range of 8V to 28V. The soft start circuit within the device is used to reduce output overshoot or inrush current when switching on the circuit.

The FAN2514S28X product is designed with a feature to increase the sensing accuracy. This is achieved by using an internal voltage divider which senses the output voltage and enables regulation through the feedback which is sent via the error amplifier. The regulation loop is completed through the voltage divider in the output stage.

Conclusion

The FAN2514S28X is a low-cost, low noise and low dropout linear voltage regulator. It features a wide input voltage range and supports an output current of 800mA. The FAN2514S28X is applicable in various applications such as mobile phones, digital cameras, laptops and other consumer electronic devices. Its working principle includes an internal two stage design, a soft start circuit and a voltage divider which enables regulation via feedback which is sent by the error amplifier. This device is a reliable solution to power a wide range of applications.

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