REQ-P-05 — Trace

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.

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).

Statement

Acceptance Criteria

Linked Test Cases

Sign-offs

`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).