Other Parts Discussed in Thread: TINA-TI, TPS793
Tool/software: TINA-TI or Spice Models
I'm trying to generate a 1.25V output in my circuit. I've followed the equation from the data sheet (equation 4) and set R2 = 30.1kohm. This results in a value for R1 of 624 for R1. When I measure the output I'm getting a value of ~1.5V. I've set C1 to 100pF per the recommendation in the paragraph below equation 4.
When I probe the Fb pin I measure the same ~1.5V. Is there any special advice for voltages near the feedback reference level?
Separately I tried to load a simulation of the LDO in my configuration using TINA-TI only to find that the TPS79301 is not available by default. The spice model provided by TI on the part webpage is encrypted which means I can't upload the model into TINA-TI.