Part Number: LM317 Tool/software: Need to have a reference circuit for using LM317 as constant current of 1mA.
application - will be use to sense temperature from PT100 sensor. (3 wire)
Voltage used is AA battery - 3V.
Part Number: LM317 Tool/software: I understand the normal equation will be below.
However we saw on the specification this formula adding R3 and -10V in the mix.
May I know when we will use both formula and what is the model behind the second equation…
Part Number: LM317 Tool/software: Hello,
I'm trying out an LM317 as a current limiter (approx. 1A max) for a purely resistive load. I've set up the design as per the datasheet (see schematic attached here).
My input voltage is +36Vdc from a…
Hi Aki,
Yes, you typically want an LDO here. LDO = Low Dropout, which is a subclass of the overall family of linear regulators. The LM317 is a linear regulator (but not low dropout). Almost all new linear regulators being designed are LDO's. I'll…
Hello Jade,
I will be taking over to help facilitate questions on this thread.
Could you please update me on what still needs to be done to answer your questions?
Thank you,
Hannah
Part Number: LM317 Tool/software: Hello,
We are using 'LM317KCS' part in one of our design. As per the datasheet of LM317KCS, on page 11 it is mentioned that the formula for output voltage is, VO = VREF (1 + R2 / R1) + (IADJ × R2). Can you please…
Part Number: LM317
Hi team,
I have made the test setup for LM317 as shown in the image attached here. While testing I have noticed that I'm getting the REF voltage as 1.25V for LM317T/NOPB and for the same setup I'm getting 1.66V for LM317KCT. I would…
Part Number: LM317 Other Parts Discussed in Thread: ISOM8710 , ISO1211 , ISO1228 Hello
I want to design a board based on a logic gate output fast optocoupler (don't have yet an exact part number of the optocoupler). The input signals to diode's of the optocoupler…
Part Number: LM317 Other Parts Discussed in Thread: BQ25172 Hi,
Is there an LDO like LM317 that can design a constant current circuit for a battery?
The specifications are as follows.
Input voltage: 17V to 19V
Output voltage: 1V to 1.5V
Constant current…