I have build -12V voltage regulator with LTC7149. Input voltage is 12V. After 8 hours with 1.5A load capacitor C7 exploded.
have anybody idea why it happen?
a) you have configured the LTC7149 for a1MHz switching frequency -> factor of 10 more than specified for your capacitor
b) according to the formula on page 12 ripple current equals output current with your 12V -> -12V setup. 1.5A is 50% above your ripple rating spec.
Do you see the potential problem?