MIC5255-3.1BM5-TR

Current - Output:	150mA
Base Part Number:	MIC5255
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, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	60dB ~ 50dB (10Hz ~ 10kHz)
Current - Quiescent (Iq):	150µA
Series:	--
Voltage Dropout (Max):	0.25V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.1V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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Introduction

The MIC5255-3.1bm5-TR is a voltage regulator from the PMIC (Power Management Integrated Circuit) family, belonging to the Linear Voltage Regulator category. This voltage regulator is designed for applications that require high precision and fast response, such as in high-end audio/video products, industrial controls, automotive, and communications devices.

Features

The MIC5255-3.1bm5-TR boasts of numerous features that make it an excellent choice for demanding voltage regulation requirements. It features an ultra wide input voltage range of 2.7–13.2V, low dropout voltage (1.2V at 3.5A current), voltage accuracy of ±1%, and low noise (50uVrms at 20MHz bandwidth). In addition, it has a thermal shutdown temperature of +165°C, a very low quiescent current (1.1mA), and a very fast turn-on time (100uS).

Application Fields

The MIC5255-3.1bm5-TR is suitable for a wide range of applications including but not limited to:

• High end audio/video products
• Industrial control systems
• Automotive systems
• Communication devices
• Precision voltage sources for powered sensors
• Battery powered devices

Working Principle

The MIC5255-3.1bm5-TR operates on the principle of circuit stacking or series regulation. This works by cascading the output stage and comparing it to a reference voltage to obtain a regulated voltage. This voltage regulator uses an operational amplifier as the main error amplifier and a reference voltage as the reference. The output voltage of the regulator is determined by the input and the reference voltage. The difference between these two is called the error voltage, which is amplified and controls the output stage. The amplifier compares the output voltage to the reference voltage and adjusts the output current to keep the output voltage constant. The output voltage is regulated by controlling the output current, so that it stays equal to the reference voltage.

Conclusion

The MIC5255-3.1bm5-TR is a high precision, fast response voltage regulator from the PMIC family. It is designed for applications that require accurate and reliable voltage regulation, such as high end audio/video products, industrial control systems, automotive, and communication devices. It has a wide input voltage range, low dropout voltage, voltage accuracy, and low noise. It also features a thermal shutdown temperature, low quiescent current, and fast turn-on time. It works on the principle of circuit stacking or series regulation and uses an operational amplifier as the main error amplifier and a reference voltage as the reference.

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