# MC34063A

**Slkor SLKORMICRO Elec** · DC-DC Converters · SOP-8

MC34063A from Slkor SLKORMICRO Elec, 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 | Switch Collector | output | Collector of the internal switch transistor, rated at 40 V maximum collector voltage and 1.5 A maximum switch current. |
| 2 | Switch Emitter | output | Emitter of the internal switch transistor, rated at 40 V maximum emitter voltage. |
| 3 | Timing Capacitor | passive | Timing capacitor that sets the switching frequency; the oscillator is characterized with CT = 1.0 nF. |
| 4 | GND | power_in | Ground pin for all internal circuits. |
| 5 | Comparator Inverting Input | input | Inverting input of the internal comparator, with comparator input voltage range of -0.3 V to 40 V and threshold of 1.25 V typical. |
| 6 | VCC | power_in | Supply voltage pin, operating from 3.0 V to 36 V with 40 V absolute maximum. |
| 7 | IPK Sense | input | Peak current sense input that monitors the voltage drop across an external current sense resistor to limit switch peak current, with a current limit sense voltage of 250 mV to 350 mV. |
| 8 | Driver Collector | output | Collector of the internal voltage driver, rated at 40 V maximum collector voltage and 100 mA maximum driver collector current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Slkor SLKORMICRO Elec |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Frequency | fOSC | 30 | 38 | 45 | KHz | VPIN5=0V, CT=1.0nF, TA=25 °C | 5 |
| Charge Current | ICHG | 30 | 38 | 45 | A | VCC=5.0V to 36V, TA=25 °C | 5 |
| Discharge Current | IDISCHG | 180 | 240 | 290 | A | VCC=5.0V to 36V, TA=25 °C | 5 |
| Discharge to Charge Current Ratio | IDISCHG/ICHG | 5.2 | 6.5 | 7.5 |  | Pin 7 to VCC, TA=25 °C | 5 |
| Current Limit Sense Voltage | VIPK(sense) | 250 | 300 | 350 | mV | ICHG=IDISCHG, TA=25 °C | 5 |
| Saturation Voltage, Darlington Connection | VCE(sat) |  | 1 | 1.3 | V | ISW=1.0A, Pins 1, 8 connected, Common Emitter | 5 |
| Saturation Voltage (non-Darlington) | VCE(sat) |  | 0.45 | 0.7 | V | ISW=1.0A, RPIN8=82Ω to VCC, Forced =20, Common Emitter (Note 4) | 5 |
| DC Current Gain | hFE | 50 | 75 |  |  | ISW=1.0A, VCE=5.0V, TA=25 °C | 5 |
| Collector Off-State Current | IC(off) |  | 0.01 | 100 | A | VCE=36V | 5 |
| Threshold Voltage (TA=25 °C) | VTH | 1.225 | 1.25 | 1.275 | V | TA=25 °C | 5 |
| Threshold Voltage (TA=-40 to 85 °C) | VTH | 1.21 | 1.25 | 1.29 | V | TA=-40 to 85 °C | 5 |
| Threshold Voltage Line Regulation | REGLINE |  | 1.4 | 5 | mV | VCC=3.0V to 36V | 5 |
| Input Bias Current | IIB |  | -20 | -400 | nA | VIN=0V | 5 |
| Supply Current | ICC |  |  | 4 | mA | VCC=5.0V to 36V, CT=1.0nF, VPIN7=VCC, VPIN5>VTH, VPIN2=GND, other pins open | 5 |
| Power Supply Voltage | VCC |  |  | 40 | V |  | 4 |
| Comparator Input Voltage Range | VIR | -0.3 |  | 40 | V |  | 4 |
| Switch Collector Voltage | VC(switch) |  |  | 40 | V |  | 4 |
| Switch Emitter Voltage | VE(switch) |  |  | 40 | V | VPIN 1=40V | 4 |
| Switch Collector to Emitter Voltage | VCE(switch) |  |  | 40 | V |  | 4 |
| Driver Collector Voltage | VC(driver) |  |  | 40 | V |  | 4 |
| Driver Collector Current | IC(driver) |  |  | 100 | mA | Note 2: maximum package power dissipation limits must be observed | 4 |
| Switch Current | ISW |  |  | 1.5 | A |  | 4 |
| Power Dissipation | PD |  |  | 780 | mW | TA=25 °C, SOP-8 | 4 |
| Thermal Resistance Junction-to-Ambient | JA |  |  | 160 | °C/W | SOP-8 | 4 |
| Operating Junction Temperature | TJ |  |  | 150 | °C |  | 4 |
| Lead Temperature | TLEAD |  |  | 260 | °C | Soldering, 10s | 4 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 4 |
| ESD (Human Body Model) |  |  |  | 2000 | V | Human body model | 4 |
| Supply Voltage (operation) | VCC | 3 |  | 36 | V | Operation from 3.0V to 36V input (Features) | 1 |
| Ambient Operating Temperature | TA | -40 |  | 85 | °C | Electrical characteristics range, unless otherwise specified | 5 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | Abs |  | ESD (Human body model) 2000 V under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 2: Maximum packag | 4 |

## CAD (KiCad official)

- Symbol: `MC34063A`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `mc34063a-etched.step` / `mc34063a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc34063a.step` / `mc34063a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Slkor SLKORMICRO Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590902587103666176) (12 pp, sha256 `8da76da54f55ce69`, retrieved 2026-10-17, tier: lcsc)
- **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/mc34063a-datasheet.pdf)