NCP553SQ28T1G

Current - Output:	80mA
Base Part Number:	NCP553
Supplier Device Package:	SC-82AB
Package / Case:	SC-82A, SOT-343
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	--
Current - Supply (Max):	6µA
Current - Quiescent (Iq):	1µA
Series:	NOCAP™
Voltage Dropout (Max):	1.2V @ 80mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	12V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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NCP553SQ28T1G Application Field and Working Principle

The NCP553SQ28T1G is an analog linear regulator that belongs to the type of power management integrated circuits (PMIC). It is manufactured for voltage regulation application, making it popular for mobile devices, consumer electronics, and automotive products. Furthermore, its features resistors that permit variable output voltage setting, making it a popular choice for its flexibility. This article will discuss the application field and working principle of the NCP553SQ28T1G.

Application Field

The NCP553SQ28T1G is a single-channel linear regulator that is most suited for applications such as power supplies, RF power amplifiers, rechargeable batteries, and voltage sources. It is specifically designed to provide a single low dropout (LDO) output voltage ranging from 1.8V to 28V. This product provides excellent line and load regulation while maintaining high levels of accuracy and stability even with large input and output voltage steps. Additionally, it is designed to operate in low power conditions and offer a low noise output with low output impedance.The NCP553SQ28T1G is also data sheet optimized for maximum accuracy and stability across a wide range of temperatures. It includes useful features for ease of use, such as an integrated P-FET switch for improved power conversion efficiencies, and a built-in current limiting protection and thermal shutdown protection. Therefore, this product can be used in a wide range of products and applications, including power modules, LCD displays, pipeline gas monitors, mobile communication systems, and other power management solutions.

Working Principle

The NCP553SQ28T1G is a low-dropout (LDO) regulator that operates based on the same operating principle as conventional voltage regulators. Using an internal comparator, the regulator senses the output voltage and compares it to the desired output voltage reference. When the output voltage is lower than the reference, the comparator will drive the internal pass device (p-channel MOSFET) to increase the input voltage to the regulator, and when the output voltage is higher than the reference, the comparator will reduce the input voltage.When the transistor is turned on, the output voltage will increase, and when it is turned off, the output voltage will decrease. This process of regulating the output voltage is known as feedback control, and it enables the regulator to maintain a steady output voltage despite variations in the load, temperature, and other parameters.In order to ensure reliability, the NCP553SQ28T1G has several onboard protections, such as current limiter, thermal shutdown, reverse current, and UVLO protection, that help protect the device from faults or damage. Additionally, the device has an integrated P-FET switch that can quickly turn the device off and on, reducing the quiescent current and improving the power conversion efficiency.

Conclusion

The NCP553SQ28T1G is a single-channel linear regulator that is designed for a wide range of power management applications. It features a wide range of features, such as a wide input voltage range, low dropout, and integrated protection features, that make it a suitable choice for a multitude of products and applications. Additionally, its operating principle of feedback control help the regulator in maintaining a stable output voltage despite changes in the operating environment.

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