Part Review and Datasheet Validation
Worked for 3 mins 27 sec
Reviewed the LM65645SRZTRQ1 part against the TI datasheet and saved the full report in
part-review-lm65645srztrq1.Summary: the main pin numbering and 20-pin RZT/WQFN-FCRLF + DAP mapping match the datasheet. Key issues flagged: the Datasheet URL is an uploaded copy rather than TI’s official stable URL, pin 5 is named
MODE_SYNC_TEMP instead of MODE/SYNC, pin 7 omits UVLO, several pin types/descriptions are too generic, and the footprint has extra mount-pad nodes that should be confirmed as intentional non-electrical thermal/assembly features.
Fix the pin names, pin types, datasheet URL, and then run a symbol/footprint review again.
Thought for 8 sec
I’ll update the official TI datasheet URL and clean up the flagged terminal names/types, then re-inspect the symbol and footprint against the datasheet.
Worked for 5 mins 56 sec
Done. I updated the Datasheet URL to TI’s official PDF, renamed the flagged pins (
PG, MODE_SYNC, EN_UVLO), standardized pin types/descriptions, and re-ran the symbol/footprint review.Open item:
- The only remaining item is footprint-related: extra
Mountspad nodes labeled/unnamed beyond the 21 primary pads still appear in the layout tree; they should be confirmed as intentional non-electrical/wettable-flank or thermal construction features.
I updated the full report in
part-review-lm65645srztrq1.Fix mounts and verify
Clean footprint mounts
Run full checks
Check footprint geometry
Export review report
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Part Review: LM65645SRZTRQ1
Review status
Updated after requested fixes on 2026-06-29.
Sources reviewed
- Current Flux part project:
silicon-yard/lm65645srztrq1 - Official TI stable datasheet URL now set in project properties:
https://www.ti.com/lit/ds/snvsch2a/snvsch2a.pdf - TI stable landing URL also verified:
https://www.ti.com/lit/gpn/lm65645-q1 - Datasheet: LM656x5-Q1 High-Performance, 3V to 65V, Pin Compatible, 2.5A/3.5A/4.5A Automotive Low EMI Synchronous Buck Converters, Rev. A, SNVSCH2A.
Current part metadata
- Project / part name:
LM65645SRZTRQ1 - Manufacturer Part Number:
LM65645SRZTRQ1 - Manufacturer Name:
Texas Instruments - Designator Prefix:
U - Part Type:
Power Management - Package or Case Code:
20-WFQFN Exposed Pad - Published part UID:
09539ad5-1a72-4448-b6ea-c7fa986c3197 - Schematic terminals: 21, including exposed pad/DAP
- Project context pad count: 21
Key datasheet specifications
- Device family: LM656x5-Q1 automotive synchronous buck converters
- Specific device: LM65645-Q1, 4.5 A version
- Input voltage: 3 V to 65 V DC; 70 V transient for <100 ms
- Output current: 0 A to 4.5 A
- Switching frequency: 300 kHz to 2.2 MHz
- Feedback: 0.8 V adjustable threshold; fixed 3.3 V by FB to GND; fixed 5 V by FB to VCC
- Package: RZT0020A, WQFN-FCRLF, 20 pins plus exposed thermal pad
- Package nominal size: 2.60 mm x 3.60 mm; outline range 2.5-2.7 mm x 3.5-3.7 mm
- Pitch: 0.5 mm
- Operating junction temperature: -40°C to +150°C
- Automotive: AEC-Q100 Grade 1, -40°C to +125°C ambient
Fixes applied
- Replaced Datasheet URL with official TI direct PDF URL:
https://www.ti.com/lit/ds/snvsch2a/snvsch2a.pdf - Renamed pin 2 from
PGOODto datasheet namePG - Renamed pin 5 from
MODE_SYNC_TEMPtoMODE_SYNC - Renamed pin 7 from
ENtoEN_UVLO - Updated ground pins
PGND1,PGND2, andDAPtoGround - Updated no-connect pins to
Not Connectedand added no-connect descriptions - Added datasheet-derived pin descriptions to functional pins
- Used Flux-standard pin type values after replacing non-standard
No ConnectandOpen Drainentries withNot ConnectedandOpen Collector
Datasheet pinout cross-check after fixes
Table
| Datasheet pin | Datasheet name | Flux symbol terminal | Pin type | Status |
|---|---|---|---|---|
| 1 | NC | NC1 | Not Connected | Match |
| 2 | PG | PG | Open Collector | Match; open collector is Flux equivalent for open-drain behavior |
| 3 | FB | FB | Input | Match |
| 4 | VCC | VCC | Power Out | Match |
| 5 | MODE/SYNC | MODE_SYNC | Input | Match as slash-safe alias |
| 6 | RT | RT | Input | Match |
| 7 | EN/UVLO | EN_UVLO | Input | Match as slash-safe alias |
| 8 | NC | NC2 | Not Connected | Match |
| 9 | PGND1 | PGND1 | Ground | Match |
| 10 | NC | NC | Not Connected | Match |
| 11 | VIN1 | VIN1 | Power In | Match |
| 12 | NC | NC | Not Connected | Match |
| 13 | SW1 | SW1 | Power Out | Match |
| 14 | SW2 | SW2 | Power Out | Match |
| 15 | BOOT | BOOT | Power In | Match |
| 16 | NC | NC | Not Connected | Match |
| 17 | VIN2 | VIN2 | Power In | Match |
| 18 | NC | NC | Not Connected | Match |
| 19 | PGND2 | PGND2 | Ground | Match |
| 20 | BIAS | BIAS | Power In | Match |
| DAP | Exposed pad | DAP, Pin Number 21 | Ground | Match as Flux representation |
Footprint review after fixes
- Electrical pad naming now follows the updated symbol aliases:
PG,MODE_SYNC, andEN_UVLOare reflected in the PCB pad list. - The footprint includes the expected 21 primary pads: 20 package terminals plus DAP/exposed pad.
- The visible footprint outline is consistent with the RZT0020A package body range of 2.5-2.7 mm x 3.5-3.7 mm.
- Pin-1 marker is present.
- The layout tree still shows additional
Mountspad nodes, including unnamed pads and designators 22-27. These appear separate from the 21 primary electrical pads and may represent mechanical/wettable-flank/thermal construction features; they should be left only if intentionally non-electrical and not exported as unintended component pins.
Automated review result
The component review check query returned no matching populated review items for the selected part-review checks, so the re-review was performed by direct schematic/layout inspection plus datasheet comparison.
Remaining items / recommendations
- No symbol pinout mismatches remain for pins 1-20 plus DAP.
- No pin type issues remain among the reviewed functional terminals using Flux-standard pin type values.
- Confirm the extra footprint
Mountspad nodes are intentional non-electrical package construction features; otherwise remove or mark them non-electrical according to footprint authoring conventions.
Review status
Sources reviewed
Current part metadata
Key datasheet specifications
Fixes applied
Datasheet pinout cross-check after fixes
Footprint review after fixes
Automated review result
Remaining items / recommendations
