ZLDO1117QK50TC Integrated Circuits (ICs)

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The ZLDO1117QK50TC is a high precision, low dropout linear voltage regulator that is commonly used in a wide variety of applications. It can be used in portable devices to either reduce voltage or regulate voltage levels, and can be applied in automotive, industrial and consumer applications. It offers a wide input range, a low drop-out voltage, a low quiescent current, and good output current stability.

Features and Benefits of the ZLDO1117QK50TC

• Wide Input Voltage Range: The regulator is capable of accepting input voltages ranging from 2.5V to 20V.
• Low Dropout Voltage: The ZLDO1117QK50TC operates with very low dropout voltages, as low as 0.7V at a full load of 500mA.
• Low Quiescent Current: The quiescent current of this regulator is typically only 0.2mA.
• Good Output Current Stability: The device offers good output current stability even at low output currents.
• High Output Voltage Accuracy: The output voltage accuracy of the ZLDO1117QK50TC is ± 2%.
• Thermal Shutdown Protection: The device is protected against thermal overload.
• Tight Regulation: The regulator is capable of providing tight regulation even at wide variations in temperature.
• Compact Size: The ZLDO1117QK50TC offers an ultra-small 4-pin SOT-23 package for space-constrained applications.

Application Fields

The ZLDO1117QK50TC offers an excellent combination of features and performance, making it ideal for a wide range of applications. These applications include automotive and industrial control systems, portable electronics, and consumer applications. It is often used in point-of-load voltage regulation, power-on reset generation, and battery-operated applications. It can also be used in LED lighting, telecommunication systems, and medical devices.

Working Principle

The ZLDO1117QK50TC is a linear voltage regulator, meaning that it works by dropping the input voltage to its desired level. This is done by using a p-channel MOSFET, which acts as a variable resistor between the input and output terminals. The MOSFET’s gate is biased by an internal control loop that uses an adjustable threshold to adjust the gate\'s impedance. This impedance is the source for the voltage drop across the regulator. As the load current increases, the internal control loop increases the gate voltage, reducing the dropout voltage.

The regulator also has an internal thermal protection feature. If the internal temperature of the device exceeds a certain threshold, it will shut down to protect itself from overheating. This feature works by monitoring the temperature and decreasing the gate voltage if the temperature rises above a certain point.

Conclusion

The ZLDO1117QK50TC is a high precision, low dropout linear voltage regulator that offers excellent performance in a wide range of applications. It has a wide input voltage range, low dropout voltage, low quiescent current, good output current stability, and high output voltage accuracy. The device is also protected against thermal overload and offers tight regulation even at wide temperature variations. Its compact size and ease of use make it an ideal choice for portable, automotive, industrial, and consumer applications.

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