component
U3212
Public Made by Adomby adom
UNI SEMIC DC-DC Converters, SOP-7. 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
markdownU3212
UNI SEMIC · DC-DC Converters · SOP-7
U3212 from UNI SEMIC, in a SOP-7. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Chip supply pin that also serves as the output-voltage feedback input when FB is left floating; VDD turn-on is typically 7.5 V, UVLO is typically 7 V, VDD overvoltage protection is typically 24 V, VDD clamp is typically 26 V at 10 mA, and the absolute maximum VDD supply is 30 V. |
| 2 | GND | power_in | Reference ground for the chip. |
| 3 | FB | input | Feedback input for output-voltage regulation; leaving it floating selects the default 12 V output, the internal reference is typically 1.87 V (1.84 to 1.90 V), and the FB pin voltage absolute range is -0.3 to 7 V. |
| 4 | CS | output | Peak-current sense pin, where the internal peak-current threshold is typically 0.55 V (0.50 to 0.60 V) and the CS pin voltage absolute range is -0.3 to 7 V; the datasheet classifies this pin as O, although it functions as a sense input. |
| 5 | Drain | power_in | Drain of the internal high-voltage power MOSFET, with a typical breakdown voltage of 200 V and an absolute maximum Drain pin voltage of -0.3 to 250 V. |
| 6 | Drain | power_in | Drain of the internal high-voltage power MOSFET (same node as pin 5), with a typical breakdown voltage of 200 V and an absolute maximum Drain pin voltage of -0.3 to 250 V. |
| 8 | NC | unconnected | No internal connection; the datasheet recommends leaving this pin floating. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UNI SEMIC |
| Package | SOP-7 |
| Category | Power Management (PMIC) |
| Pins | 7 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| High-voltage startup charging current | IHV | 1 | 5 | mA | HV=150V, VDD=0V | 5 | |
| High-voltage off-state leakage current | IHV_leakage | 50 | uA | HV=150V, VDD=12V | 5 | ||
| VDD startup current | IVDD_st | 100 | 300 | uA | 无开关工作 | 5 | |
| Internal differential amplifier FB reference | VFB_REF | 1.84 | 1.87 | 1.9 | V | 6 | |
| Peak current threshold (CS pin) | VIPK | 0.5 | 0.55 | 0.6 | V | 6 | |
| Typical minimum off time | TOFF_min_norm | 14.5 | 16 | 17.5 | us | 6 | |
| Drain pin voltage | Drain | -0.3 | 250 | V | 5 | ||
| VDD supply voltage | VDD | 30 | V | 5 | |||
| VDD clamp current | 10 | mA | 5 | ||||
| FB, CS pin voltage | -0.3 | 7 | V | 5 | |||
| Maximum junction operating temperature | 160 | °C | 5 | ||||
| Storage temperature | -65 | 150 | °C | 5 | |||
| Lead temperature (soldering, 10 s) | 260 | °C | 10 s soldering | 5 | |||
| ESD capability (human body model) | 3 | KV | 5 | ||||
| ESD capability (machine model) | 250 | V | 5 | ||||
| Package thermal resistance, junction to ambient (labelled SOP-8) | 165 | °C/W | junction to ambient | 5 | |||
| Operating ambient temperature | -40 | 125 | °C | 5 |
CAD (KiCad official)
- Symbol:
U3212 - Footprint:
Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm - 3D model: SOP-7 (KiCad packages3D, STEP)
- 3D model files:
u3212-etched.step/u3212-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);u3212.step/u3212.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UNI SEMIC datasheet (12 pp, sha256
e137783a7252b8ab, retrieved 2026-10-18, 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 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).