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PSSI2021SAY
Public Made by Adomby adom
Nexperia Current Source / Constant Current Source, SOT-353. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+46@@ -0,0 +1,46 @@+# PSSI2021SAY++**Nexperia** · Current Source / Constant Current Source · SOT-353++PSSI2021SAY from Nexperia, in a SOT-353. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | n.c. | unconnected | Not connected. Leave floating or tie to any convenient net; the pin has no internal bond. |+| 2 | IOUT | output | Regulated output current terminal. Sources a stabilized current (15 uA to 50 mA) into the load referenced to GND. Internal PNP collector; output voltage rating Vout = 73 V (with VS = 75 V). |+| 3 | GND | power_in | Ground / return terminal for the load current. All internal references are taken with respect to this pin. |+| 4 | REXT | passive | External resistor terminal used to program the output current. Connect a resistor Rext between REXT (pin 4) and VS (pin 5); Iout = 0.617/Rext + 15 uA. Left open, typical Iout is ~15 uA. Internal resistor value is ~48 kOhm. |+| 5 | VS | power_in | Supply voltage terminal. Absolute maximum VS = 75 V. Also serves as the reference node for the external programming resistor (Rext between pin 5 and pin 4). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | SOT-353 |+| Category | Power Management (PMIC) |+| Pins | 5 |++## Ordering variants++Same part, different packaging or reel option.++- `PSSI2021SAY`++## CAD (KiCad official)++- Symbol: `PSSI2021SAY`+- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`+- 3D model: SOT-353 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/PSSI2021SAY.pdf) (13 pp, sha256 `403e1e89af407de3`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/pssi2021say-datasheet.pdf)
page.jsonadded+34@@ -0,0 +1,34 @@+{+ "slug": "pssi2021say",+ "version": "0.1.0",+ "type": "component",+ "description": "Nexperia Current Source / Constant Current Source, SOT-353. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "pssi2021say"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "pssi2021say.kicad_sym",+ "pssi2021say.kicad_mod",+ "pssi2021say.glb",+ "pssi2021say.step",+ "pssi2021say.lbr",+ "docs/hero.png",+ "docs/pssi2021say-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "visibility": "public",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}