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CJ9107A30K
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Changjing DC-DC Converters, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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CJ9107A30K
Changjing · DC-DC Converters · SOT-23
CJ9107A30K from Changjing, 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 boosted output, rated VSS-0.3 V to VSS+8 V. |
| 2 | VSS | power_in | GND pin and reference for all voltage ratings, which are specified relative to VSS (VSS-0.3 V to VSS+8 V on VOUT, EN and LX). |
| 3 | LX | output | External inductor connection pin; the built-in MOSFET is turned off by a protection circuit if LX exceeds its limit, with a rating of VSS-0.3 V to VSS+8 V and an LX pin current of 1000 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 5 | V | 3 | |||
| Operation Start Voltage | VST1 | 0.9 | V | IOUT= 1 mA | 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 |
| LX Pin Current | ILX | 1000 | mA | 3 | |||
| Power Dissipation (SOT-23) | PD | 250 | mW | SOT-23 package | 3 | ||
| Operating Temperature | Topr | -40 | 85 | °C | 3 | ||
| Storage Temperature | Tstg | -40 | 125 | °C | 3 | ||
| Soldering Temperature | Tsolder | 260 | °C | 10 s | 3 | ||
| Input Current At No Load | ISS | 15 | µA | VIN=1.8V, VOUT=3.0V | 3 |
CAD (KiCad official)
- Symbol:
CJ9107A30K - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
cj9107a30k-etched.step/cj9107a30k-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cj9107a30k.step/cj9107a30k.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (10 pp, sha256
b3ba88b0eb2e83f1, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).
# CJ9107A30K
**Changjing** · DC-DC Converters · SOT-23
CJ9107A30K from Changjing, 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 boosted output, rated VSS-0.3 V to VSS+8 V. |
| 2 | VSS | power_in | GND pin and reference for all voltage ratings, which are specified relative to VSS (VSS-0.3 V to VSS+8 V on VOUT, EN and LX). |
| 3 | LX | output | External inductor connection pin; the built-in MOSFET is turned off by a protection circuit if LX exceeds its limit, with a rating of VSS-0.3 V to VSS+8 V and an LX pin current of 1000 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | | | 5 | V | | 3 |
| Operation Start Voltage | VST1 | | | 0.9 | V | IOUT= 1 mA | 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 |
| LX Pin Current | ILX | | | 1000 | mA | | 3 |
| Power Dissipation (SOT-23) | PD | | | 250 | mW | SOT-23 package | 3 |
| Operating Temperature | Topr | -40 | | 85 | °C | | 3 |
| Storage Temperature | Tstg | -40 | | 125 | °C | | 3 |
| Soldering Temperature | Tsolder | | | 260 | °C | 10 s | 3 |
| Input Current At No Load | ISS | | 15 | | µA | VIN=1.8V, VOUT=3.0V | 3 |
## CAD (KiCad official)
- Symbol: `CJ9107A30K`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `cj9107a30k-etched.step` / `cj9107a30k-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj9107a30k.step` / `cj9107a30k.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944525885132800) (10 pp, sha256 `b3ba88b0eb2e83f1`, retrieved 2026-10-18, 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/cj9107a30k-datasheet.pdf)