TL431 is not stable at 0.1uF capacitor at 10mA current. Please change the C80 as per figure 7-18 (Page -18) in the data sheet and app note SLVA482A . It will be stable. It will be stable without any load capacitor (this is optional for you.)
My response would be the same. You are operating the device outside of its spec range. You may want to consider a device designed for a wider operating range such as the TL431LI.
TL431LI data sheet, product information and support | TI.com …
Thanks for reaching out! There are two p2p options I would like to highlight:
1.) If the output current capability of up to 100mA is required then please look into the TL431 (p2p packages: SOT23-3 & TO92-3)
2.) If output current requirement…
Part Number: TPS23753A Other Parts Discussed in Thread: PMP8803 , TL431LI Hi,
Is it possible to use TL431LIBCDBZ as an alternative to U3 TL431ACDBVR in PMP8803?
I'm using the TL431LI part elsewhere in my design so I'd like to use this throughout. With the…
The TL431LI is an improved version of the TL431 and should be a drop-in replacement in the SOT-23-3 package.
Is the optocoupler the "A" version with the 80-160% CTR?
Check the value of the resistor in series with the opto diode.
Thank you for your question.
The customer should use the "2V" factor in Equation (33) exactly as it is; neither increasing or decreasing it. This is true for both TL431B and TL431LIB.
The factor "2V" comes from the datasheets…
Part Number: TL432LI-Q1 Other Parts Discussed in Thread: TL431LI Hello,
Can you confirm the cathode current requirement (IKA) at VKA > VREF working condition? Is this 1mA? Also provides the calculation for finding Vref for this application
Since ceramic capacitors have low ESRs, you can add a small amount of resistance in series with the capacitor. The capacitor is connected from the cathode to the anode of the TL431. I have included a link for you for your reference:
Hi Ben, Thanks - I am currently looking at the TL431LI due to availability reasons - it looks like this also has a better stability region but I assume I'll need some additional ESR.
Thank you for the help :).