Part Review Audit
Worked for 4 mins 14 sec
The datasheet URL was already populated and points to ST’s official LDK220 datasheet, so I’m using it as the reference source. I found no hard pinout/footprint mapping error, but there are metadata cleanup flags around missing package/pin-description detail.
Worked for 1 min 33 sec
Created a project doc
LDK220U50R Part Review
Date: 2026-07-20 Reviewed available part metadata, schematic terminals, footprint pads, and datasheet alignment for the published part proje...
Completed the LDK220U50R review and created the detailed report: LDK220U50R Part Review.
- The Datasheet URL was already set to ST’s official LDK220 datasheet, so no property update was needed.
- No hard pinout or footprint-pad mapping mismatch was found.
- Main flags are metadata completeness: package metadata not explicitly set, pin descriptions missing, and pin types currently
Unspecified.
Fix metadata and verify
Fix metadata
Add key properties
Recheck footprint
Run ERC/DRC
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Ask about this doc
LDK220U50R Part Review
Date: 2026-07-20
Scope
Reviewed available part metadata, schematic terminals, footprint pads, and datasheet alignment for the published part project
LDK220U50R.Source Used
- Official datasheet already present in project property: https://www.st.com/resource/en/datasheet/ldk220.pdf
- Datasheet title: STMicroelectronics LDK220, 200 mA low quiescent current and low noise LDO, DS10219 Rev 7.
No datasheet property update was required because the project already had the official ST datasheet URL set.
Existing Flux Part Information
Table
| Field | Current value | Review |
|---|---|---|
| MPN | LDK220U50R | Matches ST order code. |
| Manufacturer | STMicroelectronics | Matches datasheet. |
| Description | LDO Voltage Regulators 200 mA low quiescent current and low noise LDO | Matches device family description. |
| Part Type | Linear Regulator | Correct. |
| Designator Prefix | IC | Reasonable. |
| Datasheet URL | https://www.st.com/resource/en/datasheet/ldk220.pdf | Official ST URL; no change needed. |
| Package metadata | Not set as a project property; footprint asset is ST-SOT-89 | Recommend adding explicit package/case metadata if this part will be reused broadly. |
| Pads | 4 PCB pads | Correct for SOT-89 land pattern implementation: 3 electrical leads plus large GND tab pad. |
Datasheet Key Specs
Table
| Parameter | Datasheet value |
|---|---|
| Device family | LDK220 low-dropout linear regulator |
| Exact order code | LDK220U50R |
| Package | SOT-89 |
| Output voltage | 5.0 V fixed |
| Output current | 200 mA guaranteed |
| Operating input voltage | 2.5 V to 13.2 V |
| Absolute max VIN | -0.3 V to 14 V |
| Output accuracy | ±2% at 25 °C; ±3% over -40 °C to 125 °C |
| Dropout voltage | 100 mV typ at 100 mA; 200 mV typ / 350 mV max at 200 mA condition shown for fixed version |
| Quiescent current | 55 µA typ / 90 µA max at no load; 60 µA typ / 100 µA max at 200 mA |
| Output noise | 20 µVRMS/V, 10 Hz to 100 kHz, IOUT = 10 mA |
| Required capacitors | Typical application uses CIN = 1 µF and COUT = 1 µF; COUT range 1 µF to 22 µF |
| Operating junction temperature | -40 °C to 125 °C |
| SOT-89 feature note | No EN or ADJ pin on SOT-89 package. |
Pin / Symbol Cross-Check
Official SOT-89 pin description from the datasheet:
Table
| Datasheet pin | Symbol | Function |
|---|---|---|
| 1 | OUT | Output voltage of the LDO |
| 2 | GND | Common ground |
| 3 | IN | Input voltage of the LDO |
Current Flux symbol terminals:
Table
| Flux terminal | Pin number property | Expected datasheet function | Status |
|---|---|---|---|
| VOUT | 1 | OUT / regulated output | Pass |
| GND_1 | 2 | GND / common ground | Pass |
| VIN | 3 | IN / input voltage | Pass |
| GND_2 | 4 | GND tab / thermal tab | Pass as PCB tab representation, though datasheet pin table lists only pins 1-3. |
Symbol / Pin Description Flags
- Pin descriptions are not explicitly populated with datasheet text; the terminal designators encode the function, but properties should ideally include
Pin Description. - Pin types are currently
Unspecified; recommended pin types are Power for IN, Power/Output for OUT, and Ground for both GND terminals if the library supports those values. - The SOT-89 variant must not include EN or ADJ pins; current symbol correctly omits EN and ADJ.
Footprint Cross-Check
Current footprint asset:
ST-SOT-89.kicad_mod.Footprint pad mapping from the asset:
Table
| Footprint pad | Current Flux terminal | Size / placement from asset | Expected function | Status |
|---|---|---|---|---|
| 1 | VOUT | 0.57 mm × 1.4 mm lead pad at x = -1.5 mm | OUT | Pass |
| 2 | GND_1 | 0.65 mm × 1.2 mm center lead pad | GND | Pass |
| 3 | VIN | 0.57 mm × 1.4 mm lead pad at x = +1.5 mm | IN | Pass |
| 4 | GND_2 | 2.0 mm × 3.15 mm large tab pad | GND tab / heat spreading tab | Pass |
Datasheet Figure 35 recommended SOT-89 footprint includes 0.57 mm side pads, 0.65 mm center lead pad, 2 mm tab width, 1.5 mm pitch/spacing, and 4.35 mm overall vertical footprint height. The current footprint values align with those nominal recommended footprint features.
Mismatches / Action Items
No hard electrical pinout or footprint-pad mapping mismatch was found.
Recommended cleanup items:
- Add explicit package metadata such as SOT-89 / package code U if the property is available at the part/project level.
- Populate pin descriptions:
- Pin 1: OUT — regulated output voltage.
- Pin 2: GND — common ground.
- Pin 3: IN — input voltage.
- Pad/Pin 4: GND tab — thermal/ground tab tied to pin 2.
- Change pin types from
Unspecifiedto the closest supported electrical types. - Consider recording fixed output voltage = 5.0 V and max/operating voltage/current properties for easier parametric search and reuse.
Final Assessment
The Flux part is substantively correct for STMicroelectronics
LDK220U50R: MPN, manufacturer, description, official datasheet, SOT-89 footprint, and pin/pad mapping match the datasheet. The main issues are metadata completeness rather than functional correctness.Scope
Source Used
Existing Flux Part Information
Datasheet Key Specs
Pin / Symbol Cross-Check
Symbol / Pin Description Flags
Footprint Cross-Check
Mismatches / Action Items
Final Assessment
