AO3401A

P-channel MOSFET load switch, gates VBUS_OUT from U1 — UMW — C347476 — board-a Q1 (fitted); board-p Q1 (fitted) — rec-umw-ao3401a-c347476

Generated from the component evidence records — edit the records, not this page.

Everything below is projected from this project's stored component evidence. Values keep the exact wording, conditions, units and verdicts they were recorded with — nothing here is re-typed, corrected, or combined into an overall judgement about the part.

This record in the catalog: AO3401A

Identity

Fit: Fitted

Identity state: VERIFIED

Source state: AVAILABLE

Coverage: 2 open of 5 published

Documents and package

Datasheet PDF

UMW AO3401A P-Channel Enhancement MOSFET

Authority

MANUFACTURER_PRIMARY

Availability

AVAILABLE

Footprint preview

Package model

Interactive inspection requires JavaScript and WebGL. The package identity remains available in this page.

This geometry represents a shared footprint package and may not exactly match the manufacturer part.

Datasheet PDF — UMW AO3401A P-Channel Enhancement MOSFET

Selected source ID: src-umw-ao3401a-c347476-datasheet

Authority: MANUFACTURER_PRIMARY

Availability: AVAILABLE

Package footprint: SOT-23_L2.9-W1.3-P1.90-LS2.4-BR

This geometry represents a shared footprint package and may not exactly match the manufacturer part.

Placements

Every position this exact line occupies in the as-built design. One line may be placed many times and across more than one board.

Coverage

Coverage is stated one domain at a time and is never rolled up. A domain marked open is a question that has not been answered; it is not a finding that the part is unsuitable. A record with no open domains has not thereby been declared safe.

exact vendor identity/package/pinout

Coverage ID: cov-ao3401a-identity · Status: COVERED

Reason: UMW document title and pin figure confirm the exact C347476 identity and 1-Gate/2-Source/3-Drain pin figure.

Facts in this domain:

• fact-umw-ao3401a-manufacturer

• fact-umw-ao3401a-pinout

polarity/ratings/threshold/RDS(on)/body diode

Coverage ID: cov-ao3401a-electrical-limits · Status: COVERED

Reason: UMW absolute maximum and electrical tables supply VDS, VGS, current, RDS(on), threshold and body-diode limits.

Facts in this domain:

• fact-umw-ao3401a-vds

• fact-umw-ao3401a-vgs

• fact-umw-ao3401a-current

• fact-umw-ao3401a-rdson

• fact-umw-ao3401a-threshold

• fact-umw-ao3401a-body-diode

• fact-umw-ao3401a-thermal

20V-PD-contract Q1 gate overstress exposure

Coverage ID: cov-ao3401a-pdo3-exposure · Status: COVERED

Reason: The board-a Q1 gate network (R11 100k/R12 56k) and the AO3401A's +/-12V gate abs-max are both documented, and the calculated exposure under a factory-default STUSB4500 PDO3=20V precondition (fact-umw-ao3401a-vgs-pdo3-margin, BLOCKER - deterministic spec violation) is recorded. The mitigating provision is a separate wave-6 decision-task output, not a documentation gap, so this domain is covered by evidence even though the finding is unfavorable.

Facts in this domain:

• fact-umw-ao3401a-vgs

• fact-umw-ao3401a-gate-network

• fact-umw-ao3401a-gate-resistor-values

• fact-umw-ao3401a-vgs-pdo3-margin

application SOA/thermal/inrush behavior

Coverage ID: cov-ao3401a-thermal · Status: OPEN

Reason: UMW thermal rows and SOA figures are available, but installed copper, inrush waveform, negotiated VBUS and temperature require bench evidence.

Facts in this domain:

• fact-umw-ao3401a-soa

Blocked by: these facts must be resolved before the domain can close. Each is listed in full under Facts.

• fact-umw-ao3401a-soa

generated connectivity versus symbol/footprint/as-built confirmation

Coverage ID: cov-ao3401a-project-netlist · Status: OPEN

Reason: The board-a-baseline projection and the committed usb-pd-input.kicad_sch record Q1's nets and R11/R12 values, but a Board A generator spec, exported netlist, footprint mapping and assembled orientation still need to be created and independently checked.

Facts in this domain: none are recorded against it.

Blocked by: no blocking fact is recorded. What is missing has not been reduced to a specific recorded fact, so the reason above is the whole of what is known.

Facts

Each fact keeps its value, its unit, the conditions it holds under, where it came from and how far it has been confirmed as separate fields, because they are separate claims. A value without its conditions is not the same fact, and a verdict is about the evidence for the value, not about the part.

ABSOLUTE_MAXIMUM

A never-exceed limit. Reaching it may damage the part; it is not an operating target and there is no margin implied by it.

GUARANTEED_ELECTRICAL

A parameter the manufacturer guarantees over the stated conditions, usually with minimum, typical and maximum values.

THERMAL_SOA

Thermal and safe-operating-area behaviour: how much the part may dissipate, and under what mounting and ambient conditions.

PROJECT_STATE

A value this project recorded about how the part is used here — a chosen operating point, a net assignment, or a derived figure. Not a manufacturer specification.

Calculation dependencies

These values were derived from other recorded facts rather than read from a document. The expression and every input are published so the number can be recomputed instead of trusted. A derived value is never stronger than the weakest fact it depends on.

Fact: fact-umw-ao3401a-vgs-pdo3-margin

Expression: fact_umw_ao3401a_vgs - 20 * 100000 / (100000 + 56000)

Depends on:

• fact-umw-ao3401a-vgs

Pin maps

The mapping between schematic pins and PCB pads, or physical terminals for an external part, as recorded. A record may carry more than one map when the same part is documented in more than one context.

pinmap-umw-ao3401a-c347476

• Symbol: AO3401A_C347476

• Footprint: SOT-23_L2.9-W1.3-P1.90-LS2.4-BR

• Pins: 3

Interactions

Behaviour that is not a property of this part alone. Each interaction names the records it spans, the conditions it holds under, and how far it has been confirmed. An interaction that spans several parts appears on every one of their pages, under the same identifier, because it is equally a fact about each.

int-umw-ao3401a-netlist

• Records involved: rec-umw-ao3401a-c347476 (this record)

• Conditions: board-a-baseline asserts Q1.1 (gate) on Net-(Q1-G) with R11.1, R12.2 and C35.1; R11 100 kOhm pulls the gate to VBUS_IN for default-off, R12 56 kOhm carries the STUSB4500 VBEN (U1.16) drive. Q1.2 (source) sits on VBUS_IN. Q1.3 (drain) sits on VBUS_OUT with R13.1, TP1.1 and the future board-a J4.1/J4.2 (+15V) connector pins. Verify the exported netlist, symbol/footprint mapping and as-built orientation once Board A KiCad assets are acquired; reversed source/drain or a gate-source excursion beyond +/-12 V is a deterministic blocker (see int-umw-ao3401a-pdo3-exposure for the calculated PDO3 exposure).

• Verdict: NEEDS BENCH

Facts this rests on:

• fact-umw-ao3401a-gate-network

• fact-umw-ao3401a-gate-resistor-values

• fact-umw-ao3401a-vgs

• fact-umw-ao3401a-body-diode

int-umw-ao3401a-bench

• Records involved: rec-umw-ao3401a-c347476 (this record)

• Conditions: Scope VGS, VDS, inrush and steady current with the STUSB4500-negotiated VBUS_IN (15 V target, and 20 V if PDO3 is still enabled); confirm off leakage/body-diode direction, load regulation into the board-b DC-DC stage, case temperature and SOA margin with the intended J4/board-b downstream load.

• Verdict: NEEDS BENCH

Facts this rests on:

• fact-umw-ao3401a-rdson

• fact-umw-ao3401a-threshold

• fact-umw-ao3401a-thermal

• fact-umw-ao3401a-soa

int-umw-ao3401a-pdo3-exposure

• Records involved: rec-umw-ao3401a-c347476 (this record)

• Conditions: Epic-investigation finding: on a factory-default (unreprogrammed) STUSB4500 NVM, PDO3 (20 V) has highest priority and a 20 V-capable PD source negotiates it before any 15V-only reprogram is applied (doc/src/content/docs/inbox/nvm-programming.md). With VBEN asserted and VBUS_IN at 20 V, the Q1 gate divider (R11 100k/R12 56k) puts Vgs at approximately -12.82 V (fact-umw-ao3401a-vgs-pdo3-margin), exceeding the AO3401A's +/-12 V gate absolute maximum (fact-umw-ao3401a-vgs) by about 0.82 V. This bundle records the numbers only; the wave-6 decision task decides the provision (NVM reprogram-before-first-attach gate, a resistor-value change, an added clamp/limiter, or another mitigation).

• Verdict: NEEDS BENCH

Facts this rests on:

• fact-umw-ao3401a-vgs

• fact-umw-ao3401a-vgs-pdo3-margin

• fact-umw-ao3401a-gate-network

• fact-umw-ao3401a-gate-resistor-values

Cross-component rules

Rules that span several parts at once and are published in full on the integration page. Each rule's verdict below is that rule's own — it is a statement about the cross-component question, not about this part — and the exact wording of what the rule refuses to conclude is published with the rule itself.

• rule-tvs-clamp-vs-absmax — tvs-clamp-vs-absmax — rule verdict: UNSOURCED

• rule-ab-interface-current — ab-interface-current — rule verdict: NEEDS BENCH

• rule-q1-gate-drive-vs-contract — q1-gate-drive-vs-contract — rule verdict: NEEDS BENCH

• rule-evidence-chain — source-to-bench-chain — rule verdict: UNSOURCED — How far each claim has travelled from a manufacturer document towards a measurement on real hardware, stage by stage.

All cross-component rules

Sources

Every document cited above, with its identification, when it was retrieved, and what kind of authority it carries. Sources that could not be retrieved are listed too, with their unavailability stated, so a gap in the evidence is visible rather than absent.

UMW AO3401A P-Channel Enhancement MOSFET

Source ID: src-umw-ao3401a-c347476-datasheet · Authority: MANUFACTURER_PRIMARY

Locator: Page 1 pin figure and absolute maximum table; page 2 electrical-characteristics table; Figures 9-11 SOA/thermal

Availability: AVAILABLE

Document URL: https://www.umw-ic.com/static/pdf/c9d58224f731ff9fc35c005d79a7a9bf.pdf

Board A baseline net-connectivity snapshot

Source ID: src-ao3401a-board-a-baseline · Authority: PROJECT_GENERATOR

Locator: nets rows VBUS_IN, Net-(Q1-G), VBEN and VBUS_OUT

Availability: AVAILABLE

Document URL: https://raw.githubusercontent.com/Takazudo/zudo-pd/c89c1541fbd6315c9d41fd4f55737368ebcb7bbf/scripts/schgen/baselines/board-a.json

zudo-pd KiCad schematic, USB-PD input sheet

Source ID: src-ao3401a-usb-pd-input-sch · Authority: PROJECT_GENERATOR

Locator: symbol instance property rows Reference/Value for R11 (100k), R12 (56k) and Q1 (AO3401A_C347476, value -30V -4A)

Availability: AVAILABLE

Document URL: https://raw.githubusercontent.com/Takazudo/zudo-pd/9f4d6240f1f5c14660e0bbb62c256139e15c54ef/usb-pd-input.kicad\_sch

Legend

What the recorded terms on this page mean, in ordinary words. The exact terms above are the ones that count; these descriptions explain them and never replace them.

Verdict

Provenance

Fact class

Coverage status

Source availability

Source authority

Identity state

Source state

Unit

Raw agent resource

This page is generated from a stored evidence bundle and does not restate it. The bundle is the source of truth: where the two ever disagree, the bundle is right and this page is stale.

No owning bundle is identified in the published model.