Description:The LM317 Linear Regulator Module is a step-down DC-DC converter based on the LM317 linear regulator and is used to stabilize and produce an output voltage lower than the input voltage. In addition to the LM317 regulator, this module includes two connectors for connecting the input and output voltages and a potentiometer for fine-tuning the output voltage. This module is capable of receiving an input voltage in the range of 4.2 to 40 V and, depending on the potentiometer settings, provides an output voltage in the range of 1.2 to 37 V.
Compared to switching converters, linear converters such as the LM317 have a simpler circuit and usually use only two capacitors to stabilize the voltage. Unlike switching converters that use more complex mechanisms such as feedback and changing the switching time to reduce the voltage, linear converters dissipate excess voltage as heat. This makes the efficiency of these converters lower and requires a heat sink to cool the regulator.
The advantages of this module include a very low ripple output voltage, which makes it suitable for systems sensitive to noise and voltage fluctuations. Also, the simple design and low cost of this module make it a cost-effective option for low-power applications. This module is ideal for systems that do not require high output current.
However, this module also has disadvantages. Low efficiency due to heat loss is one of its main disadvantages. Also, due to heat generation, the use of a heat sink is necessary to prevent overheating. In addition, the output current of this module is limited and they are usually suitable for low-current loads.
This module is used in various applications. For example, this module is an ideal choice for powering sensitive systems that require a stable voltage with variations of less than 0.01 V. It is also used in laboratory and educational projects due to its simplicity and ability to accurately adjust the voltage. In addition, it is also suitable for low-power applications such as powering sensors, logic circuits, and other low-current loads.
Despite their low efficiency and output current limitations, linear regulator modules such as the LM317 are an ideal choice for low-power applications and noise-sensitive systems due to their simplicity, low cost, and ability to generate a stable voltage with very low ripple. If you do not need high efficiency or high output current, this module can be a good choice.
Pin:
VIN: Enter +
GND: Input -
VOUT: Output +
GND: Output -
Application:
mobile phone
PSP
laptop
Specifications:
Adjustable output voltage range: 1.2~37V
Output current: 1.5 amps
Maximum output current = 3 / (Vin - Vout)
Input voltage: 4.2~40V
Frequency: 100 (MHz)
Operating temperature: -55°C to +150°C