CS8311YDR8

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CS8311YDR8 Application Field and Working Principle

The CS8311YDR8 is a monolithic linear voltage regulator integrated circuit from the CS8311 family of products manufactured by ON Semiconductor. It is designed to provide a wide range of output voltages from an input voltage of up to 15V to power low voltage applications.

Features of the CS8311YDR8

• Wide input voltage range from 7V to 15V
• Adjustable output voltage range from 1.2V to 11.2V
• Output current up to 500mA
• Low output noise and high PSRR
• Low operating quiescent current
• High efficiency
• Able to operate in wide temperature range from -40 ˚C to 85 ˚C
• AEC-Q100 qualified
• Ceramic capacitor compatible

Applications of the CS8311YDR8

• Portable media players
• Personal navigation devices
• Mobile phone accessories
• USB-port powered devices
• Car audio systems
• Hand-held device
• Notebook computer
• Printers and copiers

Working Principle of the CS8311YDR8

The CS8311YDR8 is a linear voltage regulator that uses the difference between the input voltage and the output voltage to adjust the output current. It is designed to use a low operating quiescent current for improved efficiency. It also utilizes an externally adjustable current limiting resistor, enabling it to maintain the output voltage under a wide range of loads.

The regulator comprises two transistors in its core structure, a PNP and an NPN, which act as a bridge between the input and output. When input voltage is higher than the output voltage, the PNP transistor opens, allowing current to pass through it and bringing the output voltage up. Conversely, when the output voltage is higher than the input voltage, the NPN transistor opens, allowing current to pass through it and bringing the output voltage down.

The current limiting resistor is used to limit the amount of current that is allowed to pass through the transistors and into the output, thus maintaining a stable output voltage. Additionally, the CS8311YDR8 also features frequency compensation circuit to ensure a stable output voltage. The regulator also utilizes advanced protection circuits to protect it from overload and over temperature conditions.

Conclusion

The CS8311YDR8 is a high performance low power linear voltage regulator from ON Semiconductor. It has a wide operating voltage range and is capable of regulating output current up to 500mA, making it suitable for a wide range of applications. It is AEC-Q100 qualified, making it suitable for automotive applications. Additionally, its low operating quiescent current and high efficiency makes it an ideal choice for portable devices.

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