PQ1U381M2ZPH

Voltage Dropout (Max):	0.4V @ 150mA
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 80°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	70dB (400Hz)
Current - Quiescent (Iq):	200µA
Current - Output:	150mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.8V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

PQ1U381M2ZPH is a voltage regulator from PMIC (Power Management IC) family, and more specifically from the Linear Voltage Regulator category. It offers an integrated solution for various power management, protection, and related needs of various systems. It helps in reducing power consumption and increasing efficiency.

Application Field

PQ1U381M2ZPH offers an integrated solution for a variety of system requirements, such as handheld devices, automotive systems, and general industrial applications. Its features such as low ripple, high accuracy, and low quiescent current make it particularly suitable for battery-based applications. Moreover, its low dropout voltage translates into less power loss.

Working Principle

At a basic level, the working principle of PQ1U381M2ZPH is the same as any other linear voltage regulator. It takes a fixed input voltage, regulates it and provides outputs that are regulated and stable. The regulator features a control loop, using error amplifiers to sense and compare the regulated output voltage with the feedback voltage from the output-end of the regulator. The output of the error amplifier is then fed to the transistor switch, which controls the amount of current flowing through the power output.The feedback loop includes a reference voltage source, which sets the regulated voltage level. The error amplifier compensates for different voltage levels along the path, for example, when the input voltage is too high or too low. This ensures that the regulated output is always at the desired level. The so-called Dropper element reduces the current flow when excessive supply voltage is present, avoiding possible damage to the regulator, the power output, and the system.

Conclusion

PQ1U381M2ZPH linear voltage regulator is a suitable solution for a variety of systems and applications. It offers an integrated solution, with features such as low ripple, high accuracy, and low quiescent current, which are particularly useful for battery-based applications. The working principle of the regulator takes advantage of a control loop to compare the regulated output voltage with the feedback voltage from the output-end of the regulator, and adjust the output accordingly. All these features make this regulator an ideal choice for various industrial applications.

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