REQ-P-05 — The output power-good (PG) signal shall assert only when the FB node voltage is within ±5 % of the LM5156 reference (nominally 1.25 V), i.e. between 1.1875 V and 1.3125 V. Implemented via fixed-threshold window comparator in LM339 (no output voltage mux needed).
approved · Performance
Statement
The output power-good (PG) signal shall assert only when the FB node voltage is within ±5 % of the LM5156 reference (nominally 1.25 V), i.e. between 1.1875 V and 1.3125 V. Implemented via fixed-threshold window comparator in LM339 (no output voltage mux needed).
Acceptance Criteria
Inject FB voltage via bench supply or resistor network. Confirm PG asserts for FB in range 1.1875–1.3125 V and de-asserts outside this window. Analytical verification of resistor divider also acceptable.
Linked Test Cases
| Code | Title | Status |
|---|---|---|
TC-P-05 |
PG window — FB voltage injection test | pass |
Sign-offs
No sign-offs recorded. Approving a requirement records one here.