MIC2940A-12BT

Current - Output:	1.25A
Base Part Number:	MIC2940A-12
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	--
PSRR:	--
Current - Supply (Max):	70mA
Current - Quiescent (Iq):	500µA
Series:	--
Voltage Dropout (Max):	0.6V @ 1.25A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	26V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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MIC2940A-12BT Application Field and Working Principle

The MIC2940A-12BT is a highly integrated voltage regulator (PMIC) that offers a wide range of features and benefits across many application fields. It is an adjustable low-dropout voltage regulator that provides regulated voltage from 4.7V to 13.2V and can support a current up to 6A.

Applications

The MIC2940A-12BT is suitable for many applications, such as computers and laptops, consumer electronics, power supplies, telecoms, and automotive applications. The device is designed for optimal operation at high currents, low voltages, and long continuous operating life under heavy duty cycles, making it ideal for a wide range of applications requiring a high precision, low dropout regulator.The MIC2940A-12BU also comes with an adjustable output, controllable through an external resistive divider. This allows users to select different voltage levels to satisfy specific design requirements. Additionally, an enable pin is integrated in the device to control the activation, deactivation, or sleep mode of various components.

Working Principle

The MIC2940A-12BT is a low-dropout (LDO) voltage regulator that uses a linear regulator to produce a stabilized output voltage that is independent from input voltage variations. By using a variable resistance feedback circuit, the device adjusts the output voltages depending on the user’s desired voltage level.The device uses transistors as the main switching elements to regulate the output voltage. When the output voltage falls below its desired level, the device turns off the transistors and reduces the current to the load. On the other hand, when the voltage is above its required levels, the transistors turn on and draw more current from the source to increase the voltage at the output.The MIC2940A-12BT also has an inbuilt overtemperature-protection circuit, which protects the circuit from overloading and short-circuiting by shutting down the voltage regulator when needed. The device also has tantalum capacitors and heavy duty electrolytic capacitors for added stability and reliability.

Conclusion

The MIC2940A-12BT is a highly integrated voltage regulator (PMIC) specifically designed for applications requiring a wide range of features and benefits across many fields. With its adjustable output, controlled by an external resistive divider, and an inbuilt protection circuit, the device offers a reliable and stable solution for various applications.

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