MIC5219BM5-TR

Current - Output:	500mA
Base Part Number:	MIC5219
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	75dB (120Hz)
Current - Quiescent (Iq):	8µA
Series:	--
Voltage Dropout (Max):	0.6V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	Adjustable
Voltage - Input (Max):	12V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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MIC5219BM5-TR Application Field and Working Principle

The MIC5219BM5-TR is a fixed and adjustable voltage linear regulator from Texas Instruments. It is a precision 5V regulator, providing up to 80mA output current, and providing high accuracy, low dropout voltage and fast transient response. It can be used in various applications such as various battery-powered systems, low voltage logic, disc drives and amplifiers.

Application Field

One of the main application fields of the MIC5219BM5-TR is battery-powered systems. It features excellent load and line regulation, and provides fast, low impedance transient response, which makes it well-suited for battery-powered systems, where regulation and performance are critical.The regulator also features low operating current and low quiescent current when operating in standby mode, making it ideal for portable applications such as medical devices, cell phones, digital cameras and PDA\'s.The regulator is also suitable for applications such as low voltage logic, disc drives, amplifiers, and other linear voltage regulation requirements. It can provide precise, low noise supplies with 4.9V to 20V input range.

Working Principle

At the core of the MIC5219BM5-TR is a linear regulator architecture. It uses an external PNP (positive-negative-positive) pass transistor to regulate the output voltage.The voltage at the output of the regulator is determined by a bandgap voltage reference, a voltage divider, and an error amplifier. The error amplifier controls the base of the PNP pass transistor, setting the output voltage to the desired level.The regulator also includes several protection mechanisms to provide safe operation. It includes a protection circuit detector, which monitors the input voltage and shuts down the regulator in the event of an undervoltage condition, and a thermal shutdown circuit, which shuts down the regulator if the junction temperature exceeds its specified limit.

Conclusion

The MIC5219BM5-TR is a 5V fixed and adjustable linear regulator from Texas Instruments, providing up to 80mA of output current. It is suitable for a variety of applications such as battery-powered systems, low voltage logic, disc drives and amplifiers, and is designed with features that ensure load and line regulation, fast transient response and accurate voltage stabilization. The working principle of the regulator uses a linear regulator architecture with a PNP pass transistor, bandgap reference, voltage divider, and error amplifier for precise regulation of the output voltage. Additionally, it includes various protective and safety mechanisms to protect against various operating conditions.

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