BA178M12T

Current - Output:	500mA
Base Part Number:	BA178M
Supplier Device Package:	TO-220FP
Package / Case:	TO-220-3 Full Pack
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C
Protection Features:	--
Control Features:	--
PSRR:	63dB (120Hz)
Current - Supply (Max):	6mA
Current - Quiescent (Iq):	4.5mA
Series:	--
Voltage Dropout (Max):	2V @ 500mA (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	27V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Bulk

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Introduction

BA178M12T is a 3-terminal adjustable positive voltage regulator in Linear PMIC - Voltage Regulators series. This device can provide an output current from 15mA up to 120mA. Output voltage can be adjusted from 1.25V to 12V by a 25KΩ external resistor. The input voltage range for BA178M12T is from 10V to 18V. Its built-in thermal protection circuit allows the device to work when the ambient temperature is between -40°C and +125°C.

Features and Characteristics

The BA178M12T offers a wide range of features and benefits:

• Adjustable output voltage from 1.25V to 12V
• Output current up to 120mA
• Input voltage range of 10V to 18V
• High efficiency up to 90%
• Built-in thermal protection circuit
• Low quiescent current
• Requiring only two external resistor

Application Field and Working Principle

The BA178M12T is a versatile PMIC with a wide range of applications. It is ideal for powering general-purpose application such as DC to DC converters, digital processors, microcontrollers and for applications with limited board space. It can also be used for LED power supplies, LCD power supplies and temperature control applications in consumer electronics such as air conditioners and refrigerators. The BA178M12T is a simple 3-terminal adjustable voltage regulator. It consists of two main components: a voltage reference, and a series pass element. The amplifier is an amplifying transistor that controls the output voltage by varying the base current. The voltage reference sets the reference voltage which is fed to the base of the amplifier. The two external resistor, R2 and R1, determines the output voltage. When the input voltage exceeds the set voltage of the voltage reference, the amplifier starts to conduct. This reduces the voltage drop across the series pass element, enabling the output voltage to become greater than the set point. The output voltage is then determined by the ratio of the resistors R2 and R1. The output voltage is equal to the reference voltage multiplied by the ratio between the two resistors.

Conclusion

Linear PMIC BA178M12T is an ideal voltage regulator offering flexible adjustability, high efficiency and great performance. Its wide range of applications and user-friendly operation make it a great choice for both commercial and consumer electronics use. The built-in thermal protection circuit makes it reliable even in extreme temperatures.

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