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LM317T Linear Voltage Regulator - Adjustable Output



The LM317T Linear Voltage Regulator features an Adjustable Output @ 1.5A max, making it great for a wide range of regulation applications.

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In the realm of modern Hobbyist Electronics, we are quite fortunate in the fact that the electrical characteristic known as Voltage has become somewhat standardised, and instead of different modules and components being anywhere between 2V and 28V, we find that a lot of the Modules and even individual components are now being designed with specific popular voltages in mind – with 5V and 3.3V being two of the most popular choices for low-power electronics like Development Boards.

However, while 5V is relatively easy to attain due to the rising popularity of the 5V USB Standard, with 3.3V being similarly easy with simple 2/3 voltage divider, sometimes you need to incorporate modules or components that require unique or unexpected voltages too. In such times, a reliable Voltage Regulator like this LM317T Linear Voltage Regulator is ideal, offering Adjustable Voltage Output so you can boost or buck your circuit to the voltages required, without having to mess around with voltage-dividing circuits or bring in a secondary supply. Instead, you can simply utilise the power of this little unit to provide precise voltages to whatever components need, perfectly matching their requirements and ensuring that your circuit receives exactly what it needs to operate effectively.

As a final note, it’s important to realize that, compared to many other voltage regulators with maximum current limits, the LM317T actually features a MINIMUM current rating of 1.5A, which makes it much better for higher current applications rather than low-current applications. However, you can always bypass this lower limit by using resistors or other current-limiting tools after this component if necessary, although it is something to consider before simply integrating it into a circuit and expecting it to work with applications requiring less than 1.5A.


LM317T Adjustable Output Linear Voltage Regulator  -  Technical Specifications:

  • Manufacturer

– STMicroelectronics                                               

  • Model No.

– LM317T

  • Input Voltage

– 3V to 40V

  • Output Voltage (Adjustable)

– 1.2V to 37V

  • Min Output Current

– 1.5A

  • Internal Reference Voltage

– 1.25V

  • Output Voltage Equation

– VO = VREF (1 + R2/R1) + IADJ R2

  • No. of Outputs

– 1

  • Polarity

– Positive

  • Protection Features

– Thermal Shutdown Protection

– Internal Current Limiter

  • Load Regulation

– 0.5% , 0.5%Vo , 25mV%/Vo

  • Line Regulation

– 0.04% / V

  • No. of Pins

– 3

  • Mounting Style

– Through Hole

  • Package Type

– TO-220

  • Safe Operating Temperatures

– 0° to +125°C

  • Dimensions

– 10.4 x 4.6 x 9.15mm


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LM317T Linear Voltage Regulator - Adjustable Output

LM317T Linear Voltage Regulator - Adjustable Output