S-812C43AY-Z2-U

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The S-812C43AY-Z2-U is a low-dropout (LDO) linear voltage regulator produced by Panasonic Semiconductor Solutions Co., Ltd. It is an adjustable three-terminal positive regulator, providing an output voltage range from 1.3 to 20 V, with an accuracy of up to +/- 0.2%. The S-812C43AY-Z2-U’s high performance, low output noise and low dropout voltage, combined with its small size make it suitable for a range of applications, including automotive, computers and industrial, communications, consumer and general electronic devices.

The S-812C43AY-Z2-U is targeted at portable environments, providing a low quiescent current of 6.5μA (typical) per output voltage, and offering protection against inrush current and overcurrent/short circuit conditions. It also has a power-good indicator, and offers a wide operating temperature range of -40°C to +125°C. The device is available in through-hole SOT-223A and SOT-89 packages.

Application Field

The S-812C43AY-Z2-U is an adjustable voltage regulator, which makes it ideal for use in low-voltage applications. It is widely used for powering sensors, LCDs and other mixed-signal components. It is suitable for use in both switched-mode power converter circuits and battery-powered systems. The device is frequently used in automotive electronics, medical equipment, consumer electronics and industrial controls.

The low quiescent current, combined with its low dropout voltage, makes the S-812C43AY-Z2-U ideal for battery-powered applications. It can also be used in computer peripherals, motor controllers and power management applications, providing a reliable and efficient power source. In addition, the device is designed with a power-good indicator, making it suitable for applications requiring higher reliability.

Working Principle

The S-812C43AY-Z2-U works in a linear fashion, using the principle of current feedback regulation. It is a three-terminal device, with a power input (Vin), an output (Vout) and a ground (GND). The device operates by controlling the current fed from input to output in order to maintain a stable output voltage, despite changes in load current.

The device uses a comparator to monitor the output voltage, and the error signal generated is used to control the current fed from input to output. The amount of current fed is proportional to the magnitude of the output error, and this proportional current is used to maintain a constant output voltage, regardless of load conditions.

Furthermore, the S-812C43AY-Z2-U includes an over-current failure detection circuit to protect the device from overloads, a soft-start circuit for preventing inrush currents, and a power-good indicator for providing high reliability. The low dropout voltage and low quiescent current make the device suitable for use in battery-powered circuits, and its wide operating temperature range makes it suitable for use in diverse environments.

Conclusion

The S-812C43AY-Z2-U is a low-dropout (LDO) linear voltage regulator, ideal for powering sensors and mixed signal components. It offers an accuracy of up to +/- 0.2%, a quiescent current of 6.5μA (typical) per output voltage, and an operating temperature range of -40°C to +125°C. The device works by controlling the current fed from input to output in order to maintain a stable output voltage. It also incorporates over-current protection and a power-good indicator. The S-812C43AY-Z2-U is suitable for use in a wide range of applications including automotive, computers and industrial, communications, consumer and general electronic devices.

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