# VIPER222LSTR

**STMicroelectronics** · AC-DC Controllers And Regulators · SSOP-10-150mil

VIPER222LSTR from STMicroelectronics, in a SSOP-10-150mil. 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 | GND | power_in | Connected to the source of the internal power MOSFET and controller ground reference. |
| 2 | VCC | power_in | Supply voltage of the control section with operating range 4.5 to 30 V providing charging current for external capacitor. |
| 3 | NC | unconnected | Not connected internally; must be connected to GND pin. |
| 4 | EA-IN | input | Input of the error amplifier accepting voltages from -0.3 to 4.8 V with -1 µA pull-up current. |
| 5 | EA-OUT | output | Output of the error amplifier with 3 V saturation limit and 100 µA source/sink current capability. |
| 6 | DRAIN | output | High voltage drain pin of internal 730 V power MOSFET with 2 A pulse current rating and 15 Ω ON-state resistance; start-up bias current drawn from this pin; connect to adequate PCB copper area for heat dissipation. |
| 7 | DRAIN | output | High voltage drain pin of internal 730 V power MOSFET with 2 A pulse current rating and 15 Ω ON-state resistance; start-up bias current drawn from this pin; connect to adequate PCB copper area for heat dissipation. |
| 8 | DRAIN | output | High voltage drain pin of internal 730 V power MOSFET with 2 A pulse current rating and 15 Ω ON-state resistance; start-up bias current drawn from this pin; connect to adequate PCB copper area for heat dissipation. |
| 9 | DRAIN | output | High voltage drain pin of internal 730 V power MOSFET with 2 A pulse current rating and 15 Ω ON-state resistance; start-up bias current drawn from this pin; connect to adequate PCB copper area for heat dissipation. |
| 10 | DRAIN | output | High voltage drain pin of internal 730 V power MOSFET with 2 A pulse current rating and 15 Ω ON-state resistance; start-up bias current drawn from this pin; connect to adequate PCB copper area for heat dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SSOP-10-150mil |
| Category | Power Management (PMIC) |
| Pins | 10 |

## CAD (KiCad official)

- Symbol: `VIPER222LSTR`
- Footprint: `Package_SO:SSOP-10_3.9x4.9mm_P1.00mm`
- 3D model: SSOP-10-150mil (KiCad packages3D, STEP)
- 3D model files: `viper222lstr-etched.step` / `viper222lstr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `viper222lstr.step` / `viper222lstr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907597377753088) (20 pp, sha256 `fdc38550a4604ba3`, retrieved 2026-10-01, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/viper222lstr-datasheet.pdf)