component
PSSI2021SAY
Public Made by Adomby adom
Nexperia Current Source / Constant Current Source, SOT-353. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownPSSI2021SAY
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)
- 3D model files:
pssi2021say-etched.step/pssi2021say-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pssi2021say.step/pssi2021say.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (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).