Part Audit Review
Review all available part information (MPN, package, pin count, description, properties). If no datasheet URL is already set, search the web for the official datasheet and update the part's Datasheet property with the URL. Then cross-check the schematic symbol, footprint, and pin descriptions against the datasheet. Summarize key specs and flag any mismatches.
Thought for 41 sec
I’ll audit the part metadata, locate and attach the official datasheet if needed, then verify the symbol, footprint, and pin descriptions against it and report any mismatches.
Worked for 5 mins 48 sec
Created a project doc
nPM1304-CAAA-R7 Part Audit
Nordic Semiconductor nPM1304 Product Specification / Datasheet: https://docs.nordicsemi.com/r/bundle/ps_npm1304/page/keyfeatures_html5.html ...
Audit complete. The official Nordic datasheet URL was already set, all 35 ball mappings are correct, and the package outline/pitch match; key issues are missing pin descriptions/metadata and an unverified, unusually large solder-mask opening around the 0.269 mm pads.
Full findings: nPM1304-CAAA-R7 Part Audit. No part changes were required.
Fix metadata and pads
Add pin descriptions
Fix footprint mask
Add package properties
Run final review
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Ask about this doc
nPM1304-CAAA-R7 Part Audit
Authoritative source
- Nordic Semiconductor nPM1304 Product Specification / Datasheet: https://docs.nordicsemi.com/r/bundle/ps_npm1304/page/keyfeatures_html5.html
- Exact order code confirmed: nPM1304-CAAA-R7
- Package: 35-ball CSP, tape-and-reel order code
Current metadata
Table
| Field | Current status |
|---|---|
| Manufacturer Part Number | NPM1304-CAAA-R7 — correct |
| Manufacturer | Nordic Semiconductor ASA — present |
| Part Type | Integrated Circuit — present |
| Datasheet URL | Official Nordic URL — present; no update was required |
| Designator Prefix | U — present |
| Description | Present at project level |
| Package / Case Code | Missing as an explicit property |
| IC subtype | Missing; Power Management / PMIC would be appropriate |
| Mount, pitch, body dimensions, ball count | Not explicitly captured as properties |
Key specifications
- VBUS operating range: 4.0–5.5 V
- VBUS absolute maximum: 22 V
- Battery charger current: 4–100 mA
- Charge termination voltage: 3.6–4.65 V
- Two buck regulators: 200 mA each, 1.0–3.3 V, 100 mV steps, ±5% output accuracy
- Two configurable outputs: 50 mA LDO or 100 mA load switch
- Battery support: Li-ion, Li-polymer, LiFePO4
- Moisture sensitivity: MSL 1
- Storage temperature: −40°C to +125°C
- ESD: 2 kV HBM, 500 V CDM
Symbol and pin audit
Ball mapping
All 35 physical balls A1–E7 map to the correct functions. No missing, extra, or swapped balls were found.
Pin-name differences
The following names use Flux uniqueness suffixes rather than the shared names printed in the Nordic pin table:
Table
| Ball | Current | Datasheet |
|---|---|---|
| B2 | VBUS__1 | VBUS |
| C2 | VSYS__1 | VSYS |
| D2 | VBAT__1 | VBAT |
These suffixes preserve unique internal terminal names, but they are not exact datasheet labels.
Pin descriptions
All 35 terminals are missing the Pin Description property. Examples of descriptions that should be captured include:
- B7 SW1 — BUCK1 regulator output to inductor
- D7 SW2 — BUCK2 regulator output to inductor
- D5 CC1 — USB Type-C configuration channel 1
- B3 CC2 — USB Type-C configuration channel 2
- E4 VDDIO — Supply for TWI and GPIOs
- A6 AVSS — Ground
Pin-type differences
Digital pin directions are semantically correct: GPIO0–GPIO3 and SDA are bidirectional; SCL and SHPHLD are inputs.
The symbol does not preserve Nordic's analog/power classification exactly:
- Official Power, currently
Input: B1, B2, B4, B5 - Official Power, currently
Output: A4, A5, B6, B7, C1, C2, C6, D7 - Official Analog input, currently generic
Input: B3, D3, D5, E1, E2 - Official Analog output, currently generic
Output: A1, A2, A3, C3 - A6, A7, C7, D1, D2, E4, E7 use
Power In, which is directionally reasonable but not an exact transcription of Nordic's undirected Power classification
Pin Group, Pin Orientation, Terminal Order, and Section properties are absent on all terminals.
Footprint and mechanical audit
Confirmed matches
- Correct package family: 35-ball CSP/WLCSP
- Correct array: 5 × 7, balls A1–E7
- Body outline: 3.0775 × 2.3775 mm nominal, matching Nordic D and E dimensions
- Grid pitch: 0.419 mm in one axis and 0.440 mm in the other, matching Nordic dimensions d and e
- A1 marker is adjacent to A1
- No exposed center pad is expected or present
Mismatches / unverified details
- Copper pads are 0.269 mm diameter. Nordic specifies finished package ball diameter as 0.195–0.255 mm, but the datasheet section reviewed did not provide a recommended PCB land diameter. The 0.269 mm land therefore remains unverified, not proven incorrect.
- Each pad has 0.102 mm solder-mask margin, creating an approximately 0.473 mm mask opening. This is unusually large relative to the 0.419/0.440 mm pitch and is not supported by the reviewed Nordic guidance. This is the highest-priority footprint concern.
- Exact top-view axis convention was checked through ball coordinates and the A1 marker, but the extracted mechanical text was insufficient to independently prove every graphical orientation convention.
- STEP model presence is confirmed; model dimensions, seating height, and pin-1 rotation were not numerically verified.
- The footprint filename encodes 2.37 × 3.07 mm while local X/Y outline dimensions appear reversed. This may be a 90° naming convention rather than a geometry error.
Overall assessment
The part has the correct MPN, manufacturer, official datasheet, 35-ball mapping, package outline, and grid. The main data-quality gaps are missing terminal descriptions and organizational metadata. The main manufacturability risk is the footprint's large solder-mask opening; the copper land diameter also needs confirmation from Nordic's recommended land pattern or an authoritative IPC calculation before production use.
Authoritative source
Current metadata
Key specifications
Symbol and pin audit
Ball mapping
Pin-name differences
Pin descriptions
Pin-type differences
Footprint and mechanical audit
Confirmed matches
Mismatches / unverified details
Overall assessment
