S-817B19AMC-CWIT2G

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The S-817B19AMC-CWIT2G is a Linear Voltage Regulator developed by Semtech that finds use in a variety of applications and different power supply solution designs. It is equipped with 1.5 A output current capability and adjustable output voltage range from 1.2V to 5.5V. The series is composed of high-performance, low-dropout regulator controlled by a comparator and current sourcing P-channel MOSFET.

Features and Benefits

The S-817B19AMC-CWIT2G series boasts some great features and benefits that make it the perfect choice for a variety of applications. It is equipped with low drop-out voltage, low quiescent current, and an extremely high PSRR and output accuracy. The series also features short-circuit protection and thermal shutdown circuits, providing an extra layer of security and reliability. The whole package is compliant with AEC-Q100 standards, making it great for automotive applications.

Applications

The S-817B19AMC-CWIT2G series finds use in a variety of applications that demand high precision and reliable output current. The series can be deployed in consumer electronics such as VRLA / Li-ion battery-powered devices, hand-held devices, and wireless chargers. Additionally, the device can be used for telecom, communication, industrial equipment, and automotive applications. Finally, the series is highly applicable for medical devices such as portable medical instruments and medical analysis equipment.

Working Principle

The S-817B19AMC-CWIT2G works using a comparator that is integrated in the device. This comparator is responsible for controlling the output voltage, by comparing the voltage at the reference and the output pin. When the voltage on the reference pin is higher than the output voltage, then the P-channel MOSFET is turned on, clamping the output voltage. On contrary, when the voltage at the reference pin is lower than the output voltage, then the P-channel MOSFET is turned off, allowing current to flow through the external load.

The series is also equipped with a current sensing input that helps prevent damage to the device due to excessive current loads. This helps protect both the device and the circuit from potential damage and it helps maintain a stable output voltage. The logic signal is directly compared with the voltage drop across the current sensing input, and when the output current exceeds the set current limit threshold, the device will shut down automatically, preventing the output voltage from collapsing.

Conclusion

The S-817B19AMC-CWIT2G is a powerful, low-dropout linear regulator designed for a variety of applications and different power supply solution designs. It features short-circuit protection and thermal shutdown circuits, making it highly reliable and secure to use. The series is also AEC-Q100 compliant, making it great for automotive applications. The device works by employing a comparator to control the output voltage, and a current sensing input to protect against excessive currents.

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