component
U3211
Public Made by Adomby adom
UNI SEMIC AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against 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
markdownU3211
UNI SEMIC · AC-DC Controllers And Regulators · SOP-8
U3211 from UNI SEMIC, in a SOP-8. 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 | VDD | power_in | Chip positive supply pin; also serves as output voltage feedback reference when FB pin floats; typical application requires 100nF bypass capacitor on this pin. |
| 2 | GND | power_in | Chip reference ground. |
| 3 | FB | input | Feedback input pin for output voltage regulation; when this pin floats, default output voltage is 12V. |
| 4 | CS | output | Peak current detection output pin for inductor peak current monitoring and cycle-by-cycle current limiting. |
| 5 | Drain | output | Internal high voltage MOSFET drain; operating voltage range −0.3 V to 650 V, rated breakdown voltage 650 V, static on-resistance 4.5 Ω. |
| 6 | Drain | output | Internal high voltage MOSFET drain; operating voltage range −0.3 V to 650 V, rated breakdown voltage 650 V, static on-resistance 4.5 Ω. |
| 7 | Drain | output | Internal high voltage MOSFET drain; operating voltage range −0.3 V to 650 V, rated breakdown voltage 650 V, static on-resistance 4.5 Ω. |
| 8 | Drain | output | Internal high voltage MOSFET drain; operating voltage range −0.3 V to 650 V, rated breakdown voltage 650 V, static on-resistance 4.5 Ω. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UNI SEMIC |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
U3211 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
u3211-etched.step/u3211-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);u3211.step/u3211.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UNI SEMIC datasheet (10 pp, sha256
ebcf7302fc1b0f4a, retrieved 2026-09-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).