Part Number:LM5165
Hi everyone,
We have a dessign where we need to use the adjustable version of the LM5165 (we need a 12V output). However for prototyping we are not able to solder manually the VSON-10 package so we are trying to use the LM5165-Y (3.3V fixed version) with the VSSOP package, setting an external "extra" voltage divider plus the internal one in order to make the output voltage higher.
For the moment we are not able to get more than 10.53V in the output, no matter which external resistors we add on the feedback. Also we see a kind of instability,(the output is not fixed in all the input range we need : 17-40V.
Is it possible what we are trying? Is there any internal limitations? We are using the LM5165 in PFM mode (RT to GND), no hysteresis (enable always to VIN), CCS=27nF and current limit set to the minimum (60mA), we need only 12V/30mA.
Best regards