NCV4949DWR2

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NCV4949DWR2 is an advanced low-dropout (LDO) voltage regulator, developed by ON Semiconductors. It is an ideal device for efficient power delivery requiring ultra-low voltage ripple and minimal output noise. With an embedded PowerPath control function, NCV4949DWR2 is designed to provide customers with the highest degree of system performance, accuracy and safety. The device’s advanced features, such as wide input-output voltage ranges, fast transient response, and ultra-wide temperature range, make it an ideal choice for a variety of applications. In this article, we discuss the application field and working principle of the NCV4949DWR2.

Application Field

The NCV4949DWR2 is a highly versatile device and can be used in a wide range of applications. It is suitable for use in electronic cameras and other equipment requiring power management solutions, including industrial and automotive applications. Its low quiescent current and fast transient response time are particularly suitable for battery-powered applications with very high power efficiency requirements. Additionally, its small package, with a 4mm× 4mm footprint, makes it easy to integrate into small form factor designs.

Working Principle

The NCV4949DWR2 is a low-dropout voltage regulator that works by regulating the voltage level of a source by reducing the amount of current supplied by the source when the output voltage need to be increased. The device operates by regulating the voltage level of the source by controlling the duty cycle of its on-board P-channel MOSFET. The duty cycle is adjusted by an on-chip error amplifier, which continuously compares the voltage between its input and output. When the output voltage is lower than the reference voltage of the error amplifier, the duty cycle is increased thus increasing the voltage level at the output. Conversely, when the output voltage is higher than the reference voltage of the error amplifier, the duty cycle is decreased thus decreasing the voltage level at the output.

The device has a wide input voltage range of 4.5V - 20V, and can provide a regulated output voltage of up to 12V. It also has a fast transient response time of 3μs and a low quiescent current of 160μA. The device has an on-board thermal protection circuit which shuts down the power pass element when the junction temperature exceeds its maximum rating, thus protecting the device from thermal overload.

In addition, the device also provides a PowerPath™ control feature which automatically enables or disables the device when the voltage drops below the regulation voltage. This feature helps to ensure that the device will stay connected to the power source until the power has dropped below the regulation voltage and that the device does not shut down prematurely.

Overall, the NCV4949DWR2 is an advanced low-dropout voltage regulator that is suitable for a variety of applications. It is highly efficient and has a wide range of features and safety features which make it an ideal choice for a variety of applications.

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