PQ1LA183MSPQ

Voltage Dropout (Max):	0.7V @ 300mA
Supplier Device Package:	SOT-89
Package / Case:	SOT-89-5/6
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	55dB (400Hz)
Current - Quiescent (Iq):	800µA
Current - Output:	300mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	15V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

PMIC (Power Management Integrated Circuit) is an integrated circuit that manages power supply to various devices in an electronic system. One of the commonly used PMICs are Voltage Regulators, which are dedicated ICs that regulate the voltage of an electric power supply by providing the necessary current and adjusting the output voltage to the desired level. In this article, we\'ll discuss the application field and working principle of the PQ1LA183MSPQ Voltage Regulator, which belongs to the Linear Voltage Regulator subcategory.

Applications of the PQ1LA183MSPQ Voltage Regulator

The PQ1LA183MSPQ Voltage Regulator is mainly used for the purposes of stabilizing the supply voltage, supplying a regulated output voltage, and voltage regulation of electronic devices. It can be used in various components, such as DC/DC converters, electrolytic capacitors, power lines, and batteries.The most common application of the PQ1LA183MSPQ Voltage Regulator is as input/output (I/O) filtering in digital systems. It filters out noise, interference and spikes, ensuring reliable communication between digital circuits, such as microprocessors and ASICs.Another common usage of the PQ1LA183MSPQ Voltage Regulator is in power supply voltage regulation. It accurately maintains the output voltage at its set value, which can be adjusted within the device\'s specified working range, ensuring proper and reliable operation of the system. The device also provides protection against over-current, over-voltage and short-circuit, making it an ideal choice for regulating power supply for critical systems, such as medical equipment.

Working Principle

The PQ1LA183MSPQ Voltage Regulator follows a linear regulation approach to maintain the output voltage at its desired level. This is achieved by controlling the current flow through a transistor in a series arrangement, known as a pass transistor.When the desired output voltage is set, the device automatically adjusts the current flow through the transistor to maintain the output voltage at the specified level. As the input voltage increases, the transistor\'s collector voltage increases, which automatically decreases the current flow through it, thus maintaining the output voltage at its preset level. As the input voltage decreases, the opposite effect occurs, i.e. the collector voltage decreases and the current flow increases, thus maintaining the output voltage at its set level.The PQ1LA183MSPQ Voltage Regulator also provides protection against over-current, over-voltage, and short-circuit, by utilizing an integrated self-protection circuit. The device also utilizes an under-voltage lock-out circuit to ensure that the output voltage is not regulated below the specified level.

Conclusion

The PQ1LA183MSPQ Voltage Regulator is a linear voltage regulator that can be used for various applications, such as I/O filtering in digital systems, and power supply voltage regulation. It regulates the output voltage by controlling the current flow through a pass transistor, and provides protection against over-current, over-voltage, and short-circuit. It also utilizes an under-voltage lock-out circuit to ensure that the output voltage is not regulated below the specified level.

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