MIC5399-SMYMX-T5

Current - Output:	300mA, 300mA
Supplier Device Package:	8-DFN (1.6x1.2)
Package / Case:	8-XFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	60dB (1kHz)
Current - Supply (Max):	130µA
Current - Quiescent (Iq):	55µA
Series:	--
Voltage Dropout (Max):	0.38V @ 300mA, 0.38V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V, 3.3V
Voltage - Input (Max):	5.5V
Number of Regulators:	2
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Discontinued at Digi-Key
Packaging:	Cut Tape (CT)

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What is MIC5399-SMYMX-T5?
MIC5399-SMYMX-T5 is a series of linear voltage regulator integrated circuits (ICs) which are designed for DC/DC applications. They are manufactured by Microchip and provide voltage regulation by controlling the output voltage level of the IC. Additionally, they also provide protection from under-voltage, over-voltage, and over-current conditions. The MIC5399-SMYMX-T5 ICs are part of the "SMT" family of ICs and are in a TO-263 package with five pins (Table 1). This package allows for a smaller form factor which is beneficial in various applications where space is at a premium.
Applications of MIC5399-SMYMX-T5
The MIC5399-SMYMX-T5 series of linear voltage regulators provide a wide range of applications. They are used in a variety of Voltage Regulation Systems in consumer electronics such as mobile phones, tablets, laptop computers, and in automotive applications such as engine starters, motor control systems, and lighting systems. Additionally, they are used in industrial automation, instrumentation, power management, and power supply systems. Due to their high level of regulation accuracy and improved efficiency, these regulators are suitable for a wide range of applications.Working Principle of MIC5399-SMYMX-T5
The MIC5399-SMYMX-T5 series of linear voltage regulators has an input voltage range of 4.5V to 18V and an output voltage range of 1.2V to 12V. These ICs enable higher voltage regulation accuracy than non-linear voltage regulating devices such as resistors. The voltage regulation accuracy with these ICs is approximately +/-1%. The MIC5399-SMYMX-T5 IC consists of two independent voltage regulating elements; an N-channel DMOSFET (Field Effect Transistor) and an operational amplifier to sense the feedback voltage (Figure 1).The N-channel MOSFET is used to monitor the input voltage and regulate the output voltage. This is done by controlling the “on” and “off” states of the MOSFET according to the input voltage. When the input voltage is greater than the desired output voltage, the MOSFET is turned “off” and the output voltage decreases, whereas when the input voltage is lower than the desired output voltage, the MOSFET is turned “on” and the output voltage increases.The operational amplifier senses the feedback voltage from the output of the IC and compares it with the reference voltage. If there is any discrepancy between the two, then the IC adjusts the output voltage and the cycle is repeated. This regulation is essential because it ensures that the IC will maintain a constant output voltage.Conclusion
The MIC5399-SMYMX-T5 series of linear voltage regulator ICs provides regulated output voltage that is precise and accurate. They are suitable for a wide range of applications in consumer electronics and industrial automation. Their small form factor and high efficiency makes them suitable for applications where size and power consumption are a concern. They achieved this by using an N-channel MOSFET and an operational amplifier to regulate the voltage. By using this IC, designers can reduce the size and cost of their designs while still achieving the desired output voltage regulation.

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