Current - Output:	50mA
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	--
Control Features:	--
PSRR:	--
Current - Supply (Max):	2.1µA
Current - Quiescent (Iq):	500nA
Series:	S-812C
Voltage Dropout (Max):	0.35V @ 10mA
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:	Active
Packaging:	Cut Tape (CT)

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Introduction to S-812C38AMC-C2ST2U

The S-812C38AMC-C2ST2U is a linear voltage regulator integrated circuit (IC) developed by Shanghai Semiconductor. This low-dropout voltage regulator provides up to 3.5A of delivery current and performs as a great power manager in various power applications.

Application Fields of S-812C38AMC-C2ST2U

The S-812C38AMC-C2ST2U\'s main function is to convert an input voltage to a lower, more stable output voltage and current level. In addition to keeping the output voltage relatively stable against fluctuating input voltage levels, it also prevents overcurrent and thermal overloads. The S-812C38AMC-C2ST2U is extensively applied in consumer electronics, such as mobile phones, digital cameras, portable media players, and electronic toys. These devices require stable power supplies that provide reliable protection against input voltage fluctuations and sudden current spikes. The S-812C38AMC-C2ST2U can be used to regulate voltage levels in battery-backed systems, too. It is also used for powering up application specific integrated circuits (ASICs) and micro-controllers, such as FPGAs and DSPs, which often operate at low power and voltage levels.

Working Principle of S-812C38AMC-C2ST2U

The S-812C38AMC-C2ST2U is a linear voltage regulator that performs its function by dissipating power in the form of heat. It applies negative feedback to the output voltage to keep it in a range of acceptable parameters. The S-812C38AMC-C2ST2U integrates a low-dropout P-channel MOSFET as the pass device to regulate the output voltage according to the input voltage and the output voltage. The internal high current P-channel MOSFET has two gates, one connected to the input voltage, named the Gate of the Voltage Reference, and the other to the output voltage, called the Gate of the Current Source. When the Gate of the Voltage Reference is set to a voltage greater than the gate of the Current Source, current passes through the MOSFET and the output voltage is regulated. The device also has various other functional blocks, such as a current limit circuit, a thermal protection circuit, a feedback amplifier, and a voltage reference. All these functional blocks interact to provide a reliable output voltage, over temperature and current limit protection.

Conclusion

The S-812C38AMC-C2ST2U is a linear voltage regulator that is typically used in low-power designs due to its low-dropout design. This linear voltage regulator is widely used in mobile phones, digital cameras, portable media players, electronic toys, and other consumer electronics for regulating voltage levels and providing protection against input voltage fluctuations and current spikes. It applies negative feedback to the output voltage to maintain stability, and it integrates a low-dropout P-Channel MOSFET as its pass device. The S-812C38AMC-C2ST2U also has various other functional blocks, such as a current limit circuit, a thermal protection circuit, a feedback amplifier, and a voltage reference, all of which work together to appropriately regulate the output voltage and provide reliable protection against short-term voltage fluctuations and current surges.

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