NCP718ASN300T1G

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NCP718ASN300T1G Application Field and Working Principle

The NCP718ASN300T1G is a linear voltage regulator from ON Semiconductor which offers an adjustable output voltage that can range from 1.225V to 5.5V. It is a three-terminal device which provides excellent line and load regulations in a wide range of output currents up to 1A. This device is packaged in an industry standard 8-pin small out-line package (SOP) and is used in various application circuits where an adjustable voltage source is needed. This device is specially made for applications involving always-on low dropout (LDO) and/or adjustable voltage regulators.

Features and Benefits

The NCP718ASN300T1G works on a wide input voltage supply ranging from 2.6V to 10V. Its low dropout voltage makes it suitable for applications where low battery voltage is present. It has a good thermal performance due to its high power dissipation ability of 500mW. Moreover, its low quiescent current of just 2ˆA allows for high efficiency performance. There are additional features that the NCP718ASN300T1G offers such as a high power supply rejection ratio of 75dB, a low output voltage offset of 2mV and a fast transient response of 60mV/µs.

Working Principle

The NCP718ASN300T1G works on a simple linear voltage regulating theory. It compares the reference voltage sourced by the REF pin to the feedback voltage sourced by the FB pin, and adjusts the device’s output voltage accordingly. A typical application circuit of the NCP718ASN300T1G is shown in figure 1 below.

Figure 1: NCP718ASN300T1G application circuit

Application Fields

The NCP718ASN300T1G is suitable for various applications such as power supplies, portable consumer devices, automotive systems, battery-powered systems, handheld instruments, and many other consumer and industrial applications. This device is commonly used in designs as a single-cell Li-ion battery application or as a buck-boost converter.The NCP718ASN300T1G is an ideal device for automotive systems. It is designed with a field-effect transistor (FET) and it offers an adjustable output voltage from 0.825V to 5.5V. It has a very low quiescent current which makes it suitable for low current applications. Other wireless applications such as GPS, wireless keyless entry and similar applications mentioned above are all viable applications for the NCP718ASN300T1G.

Conclusion

The NCP718ASN300T1G is a linear voltage regulator offered by ON Semiconductor that offers adjustable output voltage ranging from 1.225V to 5.5V over a wide input voltage supply range and with a low dropout voltage. Its various features such as low quiescent current, excellent line and load regulation and fast transient response make it suitable for various applications such as wireless, automotive, battery-powered applications, etc.

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