NCP553SQ28T1

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NCP553SQ28T1 is a low-dropout (LDO) linear voltage regulator with a fixed output voltage of 28V. It employs circuit protection features such as overcurrent protection (OCP), thermal shutdown (TSD) and undervoltage lockout (UVLO). It has minimum quiescent current (Iq) and superior power supply rejection ratio (PSRR), thus making it suitable for applications such as automotive, industrial and consumer.

The NCP553SQ28T1 is available in a TO-220-6L packages, operates over an extended temperature range of -40 ℃ to +125 ℃ and supports an input voltage range of 4 V to 40 V. It includes current-limiting and thermal shutdown protection, along with an adjustable output current that can be programmed from 0 mA to 700 mA.

Working Principle

Linear voltage regulators use a voltage reference as the voltage input and create a regulated output voltage.The linear regulators use negative feedback to produce the constant output voltage. The output voltage is set by using a variable resistor, which is used to adjust the feedback voltage to match the reference voltage. This voltage is then compared to the input voltage and the result is used to control a pass device, such as a MOSFET or BJT. This device draws current from the power source in order to regulate its output voltage. The voltage drop across this pass device is then compared to the reference voltage and the result is used to determine whether the device should turn on or off.

The NCP553SQ28T1 also employs other protection features such as overcurrent protection (OCP) and thermal shutdown (TSD). In case of overcurrent conditions, these features help to prevent further damage to the circuits by limiting the maximum current the device can draw. Additionally, the features also help to improve the efficiency of the regulator. The thermal shut down feature helps to protect the circuit from high temperatures, while the undervoltage lockout (UVLO) prevents the regulator from drawing too much current when the input voltage drops too low.

Application Field

The NCP553SQ28T1 is designed for use in a variety of applications such as automotive, industrial and consumer. Automotive applications such as headlights, audio systems, and other electronic systems use the NCP553SQ28T1 for voltage regulation. Industrial applications such as medical equipment, instrumentation and automated test equipment require reliable and accurate voltage supply for proper functioning and the NCP553SQ28T1 is the ideal solution for such applications. Similarly, consumer applications such as household appliances, entertainment systems, and communication equipment require reliable and efficient voltage regulation and the NCP553SQ28T1 can provide this.

The NCP553SQ28T1 is a low-dropout (LDO) linear voltage regulator with low quiescent current, good power supply rejection ratio (PSRR) and excellent thermal and current protection features, all of which make it an excellent choice for a wide range of applications. This device is available in a package form factor that is compatible with the TO-220 family of packages, making it easy to integrate into applications.

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