UA78M33CKC

Voltage Dropout (Max):	2V @ 350mA
Base Part Number:	UA78M33
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	--
PSRR:	80dB (120Hz)
Current - Output:	500mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	25V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction to UA78M33CKC Voltage Regulators

The UA78M33CKC voltage regulator is a three-terminal positive linear voltage regulator of the same type (positive linear) as the series of 78xx and 79xx regulators manufactured and sold by STMicroelectronics. It is designed to provide regulated output current up to a maximum of 1.5A with either external or internal pass transistors.The UA78M33CKC regulator’s design makes it suitable for a wide variety of applications, including battery operated circuits, industrial, communications and automotive electronics.

Working Principle of UA78M33CKC Voltage Regulators

The UA78M33CKC regulator is based on a classic switched linear approach popularized in the 78xx and 79xx series regulators. The regulator is a three-terminal, adjustable device, where one terminal is the input, one is the output, and one is the reference voltage (adjustment terminal).The UA78M33CKC regulator works by taking an input voltage, changing it using a series of transistors, resistors, and capacitors, and producing an output voltage held at a fixed voltage determined by the user.The regulator combines a current limiting system and a short-circuit protection circuit with a switching topology. In operation, the regulator’s output voltage is kept constant by monitoring the voltage at the adjustment terminal. If the output voltage exceeds the voltage at the adjustment terminal, the regulator will turn off the pass transistor to reduce the output voltage. Conversely, if the output voltage is below the voltage at the adjustment terminal, the regulator will turn on the pass transistor to increase the output voltage.

Applications of UA78M33CKC Voltage Regulators

The UA78M33CKC voltage regulator is suitable for a variety of applications, specifically in industrial, automotive, communications and battery open-circuit circuits. It can be used to provide regulated outputs from a variety of power sources.One of the most popular uses of the UA78M33CKC regulator is in battery operated devices. It can deliver a regulated voltage in the range of 1.9V to 6V, allowing devices to run longer on the same charge.The regulator can also be used in applications where an adjustable output voltage is required, such as in adjustable power supplies, voltage converters, and DC/DC converters.

Conclusion

The UA78M33CKC is a three-terminal, adjustable voltage regulator from STMicroelectronics that combines a current limiting system, a short-circuit protection circuit, and a switching topology to provide a regulated output voltage from 1.9V to 6V. This makes it suitable for a wide range of applications including industrial, automotive, communications and battery-operated electronics.

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