PC-02 · Chapter 1 · Passives & Components
MLCC field failure at cold
A product with a 100 µF ceramic output capacitor bank glitches in the field at −40 °C. What do you suspect?
| Level | ●● onsite technical |
| Track | General board |
| Really testing | Temperature and DC-bias derating stacking up; loop stability that depends on Cout. |
Full worked answer: in the book, page 14 — what to say first, how to explain it, the numbers worth quoting and the follow-ups. About the book →
Going deeper
Extra explanation that is not in the book: worked numbers, where people go wrong, and how to say it in the room.
Going deeper for this question is coming.
Errata
Correction: Z5U temperature range corrected to +22/−56% (only Y5V reaches −82%). Fixed before the first printing. All errata
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