S-1312D25-A4T1U3

Current - Output:	150mA
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):	30µA
Current - Quiescent (Iq):	1µA
Series:	S-1312
Voltage Dropout (Max):	0.32V @ 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

The S-1312D25-A4T1U3 is a linear voltage regulator that is widely used to maintain a precise supply voltage to maintain accuracy in power delivered to circuits. Specifically designed to provide a reliable and precise level of output voltage, this model can operate at constant current and provide flexibility in terms of the output power. The linear voltage regulator is manufactured by Silergy and is available in a unipolar format with operating temperatures ranging from -40°C to +85°C.

Application Field

The S-1312D25-A4T1U3 is a low power linear voltage regulator that is mainly used in powered devices and plant control systems, such as computers, automotive systems, solar cells, and battery-operated gadgets. This voltage regulator is also used for powering devices with a mains power supply. Owing to its comprehensive range of input and output voltages, the S-1312D25-A4T1U3 is also used in various industrial and automotive applications, such as power supplies, inverters, converters, and three-phase motor control systems.

Working Principle

The S-1312D25-A4T1U3 is a three-terminal device, with two input and one output terminals. The two input pins receive the input voltage, usually between -40V to 40V. The voltage between these two pins is regulated in order to achieve the desired output voltage. This voltage regulation is achieved by the controlled resistance of the linear regulator. The output of the linear regulator is connected to the output terminals, where the regulated output voltage is provided. The linear voltage regulator consists of two transistors. When the input voltage is greater than the output voltage, then the voltage across the two transistors is increased. This causes current gain through the base-emitter of the first transistor, which increases the current that flows through the collector-emitter of the second transistor and which is then connected to the output. This process lowers the output voltage, hence, reducing the difference between the input and output voltages. On the other hand, when the input voltage drops below the output voltage, then the voltage across the two transistors is decreased. This reduces the current gain through the first transistor, thus, reducing the output current. The output voltage is thus increased, bringing the difference between the input and output voltages to a minimum. The S-1312D25-A4T1U3 maintains the output voltage within a tight range by continuous adjustment of the collector-emitter currents of the two transistors.

Conclusion

The S-1312D25-A4T1U3 is a low power linear voltage regulator that is used in a range of applications from powered devices to industrial and automotive systems. It works by regulating the voltage between its two input pins, in order to provide an output voltage at its output pin. This regulation is achieved through the controlled resistance of the linear regulator, which is the combined action of two transistors. The S-1312D25-A4T1U3 is an efficient and reliable product designed to provide a precise level of output power while withstanding harsh environmental conditions.

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