# MC34063S8

**TECH PUBLIC** · DC-DC Converters · SOP-8

MC34063S8 from TECH PUBLIC, in a SOP-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 | SC | passive | Switch collector: internal Darlington pair T1 collector. |
| 2 | SE | passive | Switch emitter: internal Darlington pair T1 emitter. |
| 3 | CT | passive | Timing capacitor pin; the selected capacitor value controls the internal oscillator run rate. |
| 4 | GND | power_in | Analog ground pin. |
| 5 | CII | input | Comparator inverting input that sets and initiates the Darlington pair output switch (input range -0.3 to +40 V). |
| 6 | VCC | power_in | Power supply input, operation from 3.0 V to 40 V (40 V absolute maximum). |
| 7 | Ipk | input | Peak current sense input that monitors the voltage drop across an external resistor placed in series with VCC. |
| 8 | DC | passive | Drive collector: internal Darlington pair T1 collector (40 V maximum driver collector voltage). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `MC34063S8`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `mc34063s8-etched.step` / `mc34063s8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc34063s8.step` / `mc34063s8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/mc34063s8-datasheet.pdf) (8 pp, sha256 `c7dafd4033f5a57d`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/mc34063s8-datasheet.pdf)