I am in trouble with LM22675MR-ADJ.
I use this device since years on many boards, one type (T1006) of them don't works as well as I expected.
Many of T1006 electronic boards delivered during years work fine until, during a startup,
the chip burns, fusing its pin n°7 (Vin on SOIC8 package), actually this happens frequently.
I'm testing the device with stressing both in input then output without problems
(applying 38Vdc on input , with a load of more than 1A on output).
Searching on website, I found people with the same problem (see: e2e.ti.com/.../161825),
the solutions suggested are made by me yet.
The device is used to power some internal circuitery and provide power supply to external optical encoders (total current max 600mA).
Is it possible the chip or some lot of them is bugged ?
Do you think it's better to select another ones if so, please suggest me the part number.
NOTE:
device is U118
Cell. +39.380.6334480 Sciarrini Massimo
Cell. +39.380.6334479 Giannessi Roberto
e-mail: elettronica@elitron.com