S-1333A25-A4T1U3

Current - Output:	300mA
Supplier Device Package:	HSNT-4-A
Package / Case:	4-SMD, Flat Lead Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Overcurrent, Thermal Shutdown
Control Features:	Enable
PSRR:	70dB (1kHz)
Current - Supply (Max):	38µA
Current - Quiescent (Iq):	1µA
Series:	S-1333
Voltage Dropout (Max):	0.31V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

S-1333A25-A4T1U3 is a type of linear voltage regulator from the PMIC (Power Management IC) solution from S-E Technology. It is designed to provide a stable, ripple-free voltage supply to electronic devices, such as computers, home appliances, etc. By exactly and accurately regulating user-defined input voltage, S-1333A25-A4T1U3 effectively reduces unnecessary power consumption, improves efficiency, and ensures system stability. This article will introduce the application field and working principle of S-1333A25-A4T1U3.

Application Field of S-1333A25-A4T1U3

The S-1333A25-A4T1U3 is mainly used in the electronic device industry. Specifically, it can be used in various kinds of computers, from laptops, notebooks, ultrabooks, to all-in-one PCs, as well as for set-top boxes, television sets, and home appliances. Whenever a stable and accurate voltage supply is needed, S-1333A25-A4T1U3 comes to the rescue.

Working Principle of S-1333A25-A4T1U3

S-1333A25-A4T1U3 is a traditional linear voltage regulator circuit. It is composed of two transistors and two resistors, as well as other peripheral components. In its operation, the two transistors are a pair of same-type transistors that are connected in series. The two resistors serve as the negative feedback circuit\'s control system, which allows the voltage to be kept constant. As a result, the input voltage is regulated to a user-defined voltage.When the system power up, the power switch on occasion is held open and the two transistors are off. Both the collector voltages and base voltages of the two transistors will be quickly equalized to the same voltage level. As soon as the collector voltages of the two transistors meet the predetermined user-defined voltage, the power switch will be closed, forming a closed loop, and the voltage regulator will start working.The output voltage of the voltage regulator can be maintained at a steady level by adjusting the two resistors in the feedback circuit. When the output voltage drops, the drop voltage will be increased through the negative feedback resistor, thus increasing the base current of the two transistor to make them conduct more electricity and increase the output voltage. On the contrary, when the output voltage is too high, the increase voltage will be decreased through the negative feedback resistor, thus leading to a decrease in base current and output voltage.

Conclusion

S-1333A25-A4T1U3 is a linear voltage regulator from PMIC. It is mainly used to provide a stable and accurate voltage to various kinds of computers, home appliances, and many other electronic devices. In operation, its two transistors and two resistors form a closed-loop voltage regulation system, thus maintaining a user-defined voltage output.

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