NCV4276CDT33RKG

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Linear voltage regulators play an important role in the modern power supply industry. They are designed to provide a stable and low noise output voltage, while regulating current load, ripple and load change. The NCV4276CDT33RKG is a peak current-mode linear regulator offering up to 1.0A of output current, with features such as an expandable current limit and over temperature protection. In this article, we will discuss the application field and working principles of the NCV4276CDT33RKG, and explore how it can be used in different power supply design scenarios.

Application Field

The NCV4276CDT33RKG is suited for applications such as battery operated portable devices, such as cell phones, tablet computers, and other wireless electronics. It can also be used for applications such as adjustable DC/DC converters, output voltage tracking, USB power sources, and on-board DC/DC converters.

Working Principle

The NCV4276CDT33RKG is a low dropout (LDO) linear voltage regulator, which works by comparing the output voltage to a reference voltage and decreasing or increasing the voltage across a load in order to equal the reference voltage. The device achieves this by using a current-to-voltage conversion loop. This loop compares a reference current to the output current and adjusts the internal power transistor gate voltage in response to changes in the output current.

The NCV4276CDT33RKG uses an internal PMOS transistor to pass or restrict current from the input to the output terminal. The PMOS transistor is turned “on” by the current-to-voltage conversion loop, allowing current to flow from input to output. The device also uses a P-channel Mosfet to control the output voltage and reduce power dissipation. An additional feature, Thermal Shutdown, protects the IC from overheating.

Current Limit and OTP Protection

The NCV4276CDT33RKG is designed with an adjustable current limit. This feature allows for a wide input voltage range and output current capability, reaching up to 1.0A. In addition, the device offers over temperature protection (OTP) to prevent thermal runaway damages. This feature provides protection in the event of excessive temperatures. OTP also reduces product downtime due to thermal events.

Input Voltage Range

The NCV4276CDT33RKG supports an input voltage range of 1.5V to 3.6V. The wide input voltage range allows for the use of a wider range of power sources, such as alkaline and NiMh cell batteries, as well as a variety of USB ports.

Output Voltage Range

The NCV4276CDT33RKG is adjustable to provide outputs of up to 1.8V. This allows the device to be used in a variety of applications. The output voltage is dynamically adjusted according to changes in the load or input supply, ensuring that the output is always regulated.

Conclusion

In conclusion, the NCV4276CDT33RKG is an ideal device for applications such as battery powered portable devices and adjustable DC/DC converters. With features such as an adjustable current limit, OTP protection, and wide input voltage and output voltage range, the NCV4276CDT33RKG offers a reliable and cost-effective solution for your power supply design scenarios.

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