BA178M20T

Series:	--
Packaging:	Bulk
Part Status:	Not For New Designs
Output Configuration:	Positive
Output Type:	Fixed
Number of Regulators:	1
Voltage - Input (Max):	33V
Voltage - Output (Min/Fixed):	20V
Voltage - Output (Max):	--
Voltage Dropout (Max):	2V @ 500mA (Typ)
Current - Output:	500mA
Current - Quiescent (Iq):	4.5mA
Current - Supply (Max):	6mA
PSRR:	58dB (120Hz)
Control Features:	--
Protection Features:	--
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	TO-220-3 Full Pack
Supplier Device Package:	TO-220FP
Base Part Number:	BA178M

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BA178M20T Application Field and Working Principle

BA178M20T is a three-terminal, positive linear voltage regulator integrated circuit integrated by Panasonic Corporation. It consists of a NPN Power Transistor featuring low dropout voltage and a high accuracy voltage reference. This voltage regulator contributes low power dissipation and high-accuracy output voltage, which makes this device suitable for various applications, such as battery-powered equipment and communication equipment.

Features

The BA178M20T voltage regulator has a number of features that make it suitable for various applications, such as:

• Three-terminal, positive linear voltage regulator
• Integrated NPN Power Transistor for low dropout voltage
• High accuracy voltage reference
• Low power dissipation
• High-accuracy output voltage
• Operating temperature range: -40°C to +105°C

Application Field

The BA178M20T voltage regulator is suitable for use in different applications, such as:

• Cellular phones
• Battery-powered equipment
• Communication equipment
• Computer peripheral supplies
• Test and measurement equipment

Working Principle

The BA178M20T voltage regulator has three terminals: input, output and ground. The input of the voltage regulator is connected to the power source, whereas the output is connected to the load. The ground terminal is connected to a ground voltage source. The circuit consists of a NPN Power Transistor, which acts as a low-dropout regulator. The power transistor is connected between the input and output terminals, with its emitter connected to the input voltage and the base terminal connected to the output voltage. The transistor then acts like a variable resistor, allowing current to flow through the circuit.The circuit also consists of a high accuracy voltage reference, which maintains the output voltage at a constant level. The voltage reference is connected between the base terminal of the power transistor and ground. This ensures that the output voltage stays within the specified range.

Conclusion

The BA178M20T voltage regulator is a three-terminal, positive linear voltage regulator integrated circuit integrated by Panasonic Corporation. It consists of a NPN Power Transistor featuring low dropout voltage and a high accuracy voltage reference. This voltage regulator contributes low power dissipation and high-accuracy output voltage, which makes this device suitable for various applications, such as battery-powered equipment and communication equipment.

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