CS8140YN14

The CS8140YN14 is a linearregulated low drop-out voltage regulator integrated circuit designed for powering high performance microprocessors, DSPs and ASICs used in notebook computers, where compact packaging and an output voltage accuracy of 0.8% or better is essential. This voltage regulator is able to operate with an input voltage range of 4.5-30V, well suited to the requirements of a wide range of applications.

The CS8140YN14 employs current mode regulation, with peak current mode operation not available. This associated feature allows for consistent response times to load transients, making the voltage regulator able to advertise a low output voltage accuracy of just 0.8%. An internal current limit makes the CS8140YN14 reliable in high-current applications, while a thermal shut down feature provides a level of protection from excessive temperatures.

The CS8140YN14 is featured with low drop-out voltage, with a maximum voltage drop of 0.9V at 1.5A. This allows the regulator to maintain a stable output voltage even when the input voltage is close to the desired output voltage. Other features inlcude a low quiescent current of 12uA at no load, a high transient response of 425kHz and a shutdown current of 40uA.

Application Fields

The CS8140YN14 is suited for a variety of applications such as automotive, medical, consumer electronics and even industrial applications. With its low drop-out voltage and accurate output voltage, the CS8140YN14 is able to meet the requirements of these applications. A few of these applications include powering microprocessors and DSPs in notebooks, powering ASICs for consumer applications, providing power supply for automotive electronic systems, and supplying power to medical electronic systems.

Working Principle

The CS8140YN14 voltage regulator follows the principle of linear regulation, which utilizes a feedback circuit that operates to maintain a constant output voltage. In this type of regulation, an error amplifier compares a reference voltage to the output voltage. If the output voltage starts to differ from the reference voltage, the error amplifier will instruct the power transistor to increase or reduce the current input to the output, depending on whether the output voltage is higher or lower than the reference voltage. The power transistor then forces the output voltage to match the reference voltage which is the desired output voltage.

On the other hand, the current mode regulation employed by the CS8140YN14 follows the same principle, with the slight difference that the comparator and feedback circuit monitors current instead of voltage. This makes the response time of current mode regulation faster than linear regulation and more suitable for pulsed load applications. However, there is no peak current mode operation available on the CS8140YN14.

Conclusion

The CS8140YN14 linear regulated low drop-out voltage regulator is a high-performance voltage regulator that is well-suited for a range of applications such as mobile phones and other consumer electronics, automotive electronics and medical systems. This voltage regulator uses current mode regulation to provide output voltage accuracy of 0.8%. It also features low drop-out voltage and a low quiescent current. The CS8140YN14 is reliable and efficient, and is ideal for applications where high performance and accuracy are key.