U3220E

UNI SEMIC · Power Distribution Switches · ESOP-8

U3220E from UNI SEMIC, in a ESOP-8. 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 floating; a 0.1uF SMD capacitor is recommended at VDD, VDD_ON is 7.5 V typ, VDD_OVP is 24 V typ, VDD clamp is 26 V typ at 10 mA, and the absolute maximum VDD supply is 30 V.
2	GND	power_in	Chip reference ground.
3	FB	input	Feedback input pin; the output defaults to 14.3 V when this pin is left floating, the internal reference VFB_REF is 1.87 V typ, the OVP threshold is 2.40 V typ, and the OLP threshold is 1.40 V typ, with FB/CS pin voltage rated -0.3 to 7 V.
4	CS	input	Peak current sense pin that sets the cycle-by-cycle peak current threshold (VIPK 0.3 V typ) with 350 ns leading-edge blanking, and the abnormal overcurrent threshold AOCP is 0.6 V typ; the FB/CS pin voltage is rated -0.3 to 7 V.
5	Drain	power_in	Internal high-voltage MOSFET drain; the Drain pin voltage is rated -0.3 to 120 V and the MOSFET breakdown voltage is 120 V typ.
6	Drain	power_in	Internal high-voltage MOSFET drain (second drain pin, same function as pin 5); the Drain pin voltage is rated -0.3 to 120 V.
7	NC	unconnected	Not connected; the datasheet recommends leaving this pin floating.
8	HV	power_in	Internal high-voltage start-up pin that supplies the 180 V start-up circuit, which charges the VDD capacitor from the HV source (IHV is 1 mA min and 4 mA max at HV=90 V, VDD=0 V).
9	Drain	power_in	Internal high-voltage MOSFET drain on the exposed thermal pad, which must be well soldered to the PCB (applies to U3220E).

Key specifications

Parameter	Value
Manufacturer	UNI SEMIC
Package	ESOP-8
Category	Power Management (PMIC)
Pins	9

CAD (KiCad official)

Symbol: U3220E
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
3D model: ESOP-8 (KiCad packages3D, STEP)
3D model files: u3220e-etched.step / u3220e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); u3220e.step / u3220e.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: UNI SEMIC datasheet (12 pp, sha256 94612a27fe15e502, retrieved 2026-10-09, 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF

# U3220E

**UNI SEMIC** · Power Distribution Switches · ESOP-8

U3220E from UNI SEMIC, in a ESOP-8. 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 floating; a 0.1uF SMD capacitor is recommended at VDD, VDD_ON is 7.5 V typ, VDD_OVP is 24 V typ, VDD clamp is 26 V typ at 10 mA, and the absolute maximum VDD supply is 30 V. |
| 2 | GND | power_in | Chip reference ground. |
| 3 | FB | input | Feedback input pin; the output defaults to 14.3 V when this pin is left floating, the internal reference VFB_REF is 1.87 V typ, the OVP threshold is 2.40 V typ, and the OLP threshold is 1.40 V typ, with FB/CS pin voltage rated -0.3 to 7 V. |
| 4 | CS | input | Peak current sense pin that sets the cycle-by-cycle peak current threshold (VIPK 0.3 V typ) with 350 ns leading-edge blanking, and the abnormal overcurrent threshold AOCP is 0.6 V typ; the FB/CS pin voltage is rated -0.3 to 7 V. |
| 5 | Drain | power_in | Internal high-voltage MOSFET drain; the Drain pin voltage is rated -0.3 to 120 V and the MOSFET breakdown voltage is 120 V typ. |
| 6 | Drain | power_in | Internal high-voltage MOSFET drain (second drain pin, same function as pin 5); the Drain pin voltage is rated -0.3 to 120 V. |
| 7 | NC | unconnected | Not connected; the datasheet recommends leaving this pin floating. |
| 8 | HV | power_in | Internal high-voltage start-up pin that supplies the 180 V start-up circuit, which charges the VDD capacitor from the HV source (IHV is 1 mA min and 4 mA max at HV=90 V, VDD=0 V). |
| 9 | Drain | power_in | Internal high-voltage MOSFET drain on the exposed thermal pad, which must be well soldered to the PCB (applies to U3220E). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UNI SEMIC |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `U3220E`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `u3220e-etched.step` / `u3220e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `u3220e.step` / `u3220e.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [UNI SEMIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755162676358602752) (12 pp, sha256 `94612a27fe15e502`, retrieved 2026-10-09, 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`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/u3220e-datasheet.pdf)