# MC34063ADR-TP

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

MC34063ADR-TP 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, the internal Darlington pair T1 collector; switch collector voltage is rated 40 V max and switch current 1.2 A max. |
| 2 | SE | passive | Switch emitter, the internal Darlington pair T1 emitter; switch emitter voltage is rated 40 V max. |
| 3 | CT | passive | Timing capacitor pin; the value of the selected capacitor sets the internal oscillator run rate (100 Hz to 100 kHz). |
| 4 | GND | power_in | Analog ground pin. |
| 5 | CII | input | Comparator inverting input that sets and initiates the Darlington pair output switch; threshold is 1.25 V typical. |
| 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; current limit sense voltage is 300 mV typical. |
| 8 | DC | passive | Driver collector (labelled Drive Collector in the block diagram); the pin table lists it as the internal Darlington pair T1 collector; driver collector voltage is rated 40 V max. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `MC34063ADR-TP`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `mc34063adr-tp-etched.step` / `mc34063adr-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc34063adr-tp.step` / `mc34063adr-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/mc34063adr-tp-datasheet.pdf) (8 pp, sha256 `684c6599e93abdf9`, 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/mc34063adr-tp-datasheet.pdf)