At 15.50 2012.04.14, you wrote: >> >> >> >> After research, my best candidate is to replace the Vreg from the actual >> LP2950 to a LP2951, and connect its ~ERROR output to MCLR, possibly >> directly (to save components). >> >> What do you think about my solution? :o > > >Problematic, given what you've told us. > > (30V-3.3V) * 0.1A =3D2.67 W dissipation at worst case input. No way the >LP2951 can handle that. >Best case TI D package is 97C/W so the part would be at 300C pretty quickl= y. No, I can monitor the Vin, it can go as high as 26V but only for very short time, then the MPU will react and "stabilize" it at around 5V. But very sho= rt peaks can still happen so the part must withstand it. >What is your actual load current, Around 30 with peaks into the 80mA region, hence the 100mA Vreg requirement= .. > and what is the rated power for the package you want to use? >I would suggest a beefier regulator with heat sink, and a separate LVD to >hold part in reset. > >On Sat, Apr 14, 2012 at 4:08 AM, Electron wrote: >--=20 >http://www.piclist.com PIC/SX FAQ & list archive >View/change your membership options at >http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .