MIC5209-3.3BS TR

Current - Output:	500mA
Base Part Number:	MIC5209
Supplier Device Package:	SOT-223
Package / Case:	TO-261-4, TO-261AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	--
PSRR:	75dB (120Hz)
Current - Supply (Max):	25mA
Current - Quiescent (Iq):	170µA
Series:	--
Voltage Dropout (Max):	0.6V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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MIC5209-3.3BS TR Application Field and Working Principle

The MIC5209-3.3BS TR from Microchip is a low-dropout linear voltage regulator, which is ideal for applications requiring either a 3.3V or fixed voltage supply. The device is available in both TO-220 and SOT-223 packages, which make it suitable for a wide range of applications.The MIC5209-3.3BS TR is also equipped with advanced protection features, such as a thermal protection circuit, current limiting, reverse-polarity protection, and overvoltage protection, making it an ideal solution for applications requiring a reliable and stable voltage supply.

Applications

The MIC5209-3.3BS TR is ideal for applications in which an increased performance or a small amount of space is needed. It is commonly used in a range of applications, including:

• CPU/DSP power-supplies
• Desktop/laptop power supplies
• Hubs/routers/repeaters/stations
• USB/Ethernet/IEEE1394/Fibre Channel applications
• Other components needing 3.3V

Features

The MIC5209-3.3BS TR features a wide range of features and benefits that make it an ideal solution for power delivery in a variety of applications. These features include:

• Wide input voltage range of 4.5V to 25V
• Low quiescent current: typically 80uA
• High power output up to 500mA
• High accuracy output voltage: typically 1% over temperature
• Reverse-polarity protection
• Overtemperature protection
• Current limiting and thermal shutdown protection
• Overvoltage protection with dual-fault capability

Working Principle

The MIC5209-3.3BS TR operates on the principle of a voltage regulator, which stabilises the output voltage by regulating the current. The device is designed to control a wide range of input voltages, including AC and DC signals, with precise accuracy.It works by using a reference voltage generated internally or externally, to produce a constant output voltage. This reference voltage is then compared to the input voltage to produce an error voltage. The error voltage is then amplified by an operational amplifier and a feedback loop is used to adjust the output voltage until the error voltage is minimized.The device also utilizes an N-channel MOSFET to regulate the output voltage. The MOSFET is controlled by the input from the operational amplifier, with the gate voltage connected to the output voltage. This allows the device to accurately regulate the output voltage.The MIC5209-3.3BS TR is also equipped with advanced protection features, such as current limiting, reverse-polarity protection, overvoltage protection and overtemperature protection, making it an ideal solution for applications requiring a reliable and stable voltage supply.

Conclusion

The MIC5209-3.3BS TR from Microchip is a low-dropout linear voltage regulator, which is ideal for applications requiring either a 3.3V or fixed voltage supply. This device is available in both TO-220 and SOT-223 packages, which make it suitable for a wide range of applications. It also features an internal or external reference voltage, a wide input voltage range of 4.5V to 25V, high power output up to 500mA, high accuracy output voltage, reverse-polarity protection, overvoltage protection, current limiting and over-temperature protection, making it an ideal solution for applications requiring a reliable and stable power supply.

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