LM3940IT-3.3

Voltage Dropout (Max):	0.2V @ 100mA
Base Part Number:	LM3940
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	--
Current - Output:	1A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	7.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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Introduction to LM3940IT-3.3

The LM3940IT-3.3 is a linear voltage regulator designed for use in portable electronic devices where high efficiency and low power consumption are critical. It is a three-terminal IC that operates off a single supply voltage and generates an output voltage of 3.3V. This IC is capable of supplying up to 800 mA of output current with a dropout voltage of 0.5V. The main feature of the LM3940IT-3.3 is its low power consumption compared to other voltage regulators, making it ideal for mobile applications where battery life is important.

Application Fields of LM3940IT-3.3

The LM3940IT-3.3 is ideal for any application requiring an efficient and low power voltage regulator, such as the regulation of power supply voltages in portable electronics. It is widely used in consumer electronics, gaming consoles, MP3 players, digital cameras, and other portable devices. It is also frequently used as an input voltage regulator for microcontrollers and logic circuits.

Working Principle of LM3940IT-3.3

The LM3940IT-3.3 is a three-terminal linear regulator. It uses an external pass transistor to regulate the output voltage. It operates off an input voltage and produces a stable 3.3V output voltage. This voltage is determined by an internal reference voltage and an adjustable external feedback voltage applied to the REF pin. The LM3940IT-3.3 also features an enable pin so that the regulator can be turned on and off and an over-voltage protection circuit that protects the IC from excessive input voltages.

Conclusion

The LM3940IT-3.3 is a 3-terminal linear voltage regulator designed for use in portable electronic devices where high efficiency and low power consumption are critical. It is capable of supplying up to 800 mA of output current and is widely used in consumer electronics, gaming consoles, and other portable devices. Its main feature is its low power consumption compared to other voltage regulators, making it ideal for mobile applications where battery life is important.

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