MIC29302 Voltage Regulator IC

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MIC29302 is an adjustable five-pin voltage regulator IC, with a high output current of 3A and a voltage drop of 450mV at full load. MIC29302 regulator comes with TTL logic Enable pin to shut down the regulator when not in use; this makes it suitable for battery-powered equipment and linear voltage supplies. The MIC29302 has an Adjust pin by which output voltage can be set between 1.24V to 15 V using two external resistors.  

MIC29302 is fully protected against reverse input polarity, overcurrent faults, reversed lead insertion and over-temperature operation. Its operating and storage temperature is in range of -40 to 125 °C and available in TO-263 and TO-252 packages.

MIC29302 have an output voltage range of 1.24V to 15V DC, and input voltage range is 3v to 16v. You can adjust the output voltage according to your requirement by using two external resistors connected through the ADJ pin of regulator. We can calculate the output voltage according to the below formula:

Vout = 1.25 (R1/R2 + 1)
For example, we are giving 12V as input and want 5V as output, so if R1 is 1kΩ then R2 can be calculated using:

R1/R2 =    {(Vout / 1.25) – 1}
1000/ R2 = {(5 / 1.25) – 1}
R2 = 1000/3
R2 = 333.33
So for 5v output voltage we need 333 Ω resistor at R2. 

MIC29302 Pinout

Pin Number     Pin Name     Description
1                      Enable          TTL logic pin to turn on/off the regulator
2                      In                  Input voltage that is to be regulated
3                      Ground         Connected to system ground
4                      Out               Regulated Output Voltage
5                      Adjust          Sets the output voltage using two resistor divider network

Application

For an example application, you can check out how to use MIC29302 to build LDO regulator or Low Dropout Regulator Circuit. The output voltage can be changed using high or low-value resistors at the adjusting pin.

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