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CJ9107A33K
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Changjiang Electronics Tech (CJ) DC-DC Converters, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCJ9107A33K
Changjiang Electronics Tech (CJ) · DC-DC Converters · SOT-23
CJ9107A33K from Changjiang Electronics Tech (CJ), in a SOT-23. 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 | VOUT | power_out | Output voltage pin; the output is set between 2.1V and 5.5V in 0.1V steps (33 = 3.3V) with ±2% accuracy, and the pin is rated VSS-0.3 to VSS+8V. |
| 2 | VSS | power_in | Ground pin. |
| 3 | LX | passive | External inductor connection pin (switching node); rated VSS-0.3 to VSS+8V with a maximum LX current of 1000mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | SOT-23 |
| Category | Power Management ICs |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VOUT Pin Voltage | VOUT | -0.3 | 8 | V | VSS-0.3 ~ VSS+8 | 3 | |
| LX Pin Voltage | VLX | -0.3 | 8 | V | VSS-0.3 ~ VSS+8 | 3 | |
| LX Pin Current | ILX | 1000 | mA | 3 | |||
| Power Dissipation SOT-23 | PD | 250 | mW | SOT-23 | 3 | ||
| Operating Temperature | Topr | -40 | 85 | °C | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | °C | 3 | ||
| Soldering Temperature & Time | Tsolder | 260 | °C | 10s | 3 | ||
| Input Voltage | VIN | 5 | V | Ta=25°C | 3 | ||
| Operation Start Voltage | VST1 | 0.9 | V | IOUT=1 mA | 3 | ||
| Input Current At No Load | ISS | 15 | µA | VIN=1.8V, VOUT=3.0V | 3 | ||
| Current Consumption 2 | ISS2 | 6 | 10 | µA | VOUT=VOUT+0.5 V | 3 | |
| Maximum Oscillation Frequency | fOSC | 300 | KHz | VOUT=0.95×VOUT, measure waveform at LX pin | 3 | ||
| Duty Ratio 1 | Duty1 | 70 | 78 | 85 | % | VOUT=0.95×VOUT, measure waveform at LX pin | 3 |
CAD (KiCad official)
- Symbol:
CJ9107A33K - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
cj9107a33k-etched.step/cj9107a33k-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj9107a33k.step/cj9107a33k.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjiang Electronics Tech (CJ) datasheet (10 pp, sha256
b3ba88b0eb2e83f1, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).