I've a board with 3x TPSM82480 devices.
One to generate 1.2V (from 3.3), another to generate 1.0V (from 3.3) and the last one to generate 1.8V (always from 3.3).
The first two are working fine, but we have issues with the one for the genearation of the 1.8V.
If I use the "standard" values for the resistor divider (R1 =240K, R2= 120K) as proposed by the web tool, the device is clearly unstable (even with the Feedformwrd capacitor of 36pF.
I've tried to lower the values of the resistor, keeping the same ratio, in order to increase the current flowing into the resistor divider. Now R1=150K and R2 is 75K.
The Vout become stable but it not reach the target value of 1.8V ... it is stuck at 1.2V and no way to change it ....
Any suggestion, please ?
Thanks in advance and have a good day.