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cjt1117b-1-8
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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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cjt1117b-1-8: laser-etched CAD + chip hero (factory 2.0.0 backfill)
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CJT1117B-1.8
Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
CJT1117B-1.8 from Changjing, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground return for the regulator. On the fixed-voltage CJT1117B-1.8 variant this pin is the device ground reference (labeled ADJ/GND on the package; the ADJ function is used only on the -ADJ variant). Tie directly to system ground. |
| 2 | OUTPUT | power_out | Regulated 1.8V output (1.764V-1.836V over line/load, 10mA-1A). Requires a >=22uF tantalum output capacitor to ground for stability. The SOT-223 tab (pin 4) is internally connected to this OUTPUT pin. |
| 3 | IN | power_in | Unregulated input supply, 3.3V to 12V for the -1.8 variant (absolute max 20V). Bypass with a 10uF tantalum capacitor to ground close to the pin. |
| 4 | OUTPUT | power_out | SOT-223 thermal tab, internally connected to the OUTPUT pin (pin 2). Should be soldered to a copper pour tied to VOUT for heatsinking (RθJA = 100 °C/W). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-223 |
| Category | PMIC |
| Pins | 4 |
Ordering variants
CJT1117B-1.8
CAD (KiCad official)
- Symbol:
CJT1117B-1.8 - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
cjt1117b-1-8-etched.step/cjt1117b-1-8-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cjt1117b-1-8.step/cjt1117b-1-8.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (None pp, sha256
a86693ffbb7cce0d, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# CJT1117B-1.8
**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
CJT1117B-1.8 from Changjing, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground return for the regulator. On the fixed-voltage CJT1117B-1.8 variant this pin is the device ground reference (labeled ADJ/GND on the package; the ADJ function is used only on the -ADJ variant). Tie directly to system ground. |
| 2 | OUTPUT | power_out | Regulated 1.8V output (1.764V-1.836V over line/load, 10mA-1A). Requires a >=22uF tantalum output capacitor to ground for stability. The SOT-223 tab (pin 4) is internally connected to this OUTPUT pin. |
| 3 | IN | power_in | Unregulated input supply, 3.3V to 12V for the -1.8 variant (absolute max 20V). Bypass with a 10uF tantalum capacitor to ground close to the pin. |
| 4 | OUTPUT | power_out | SOT-223 thermal tab, internally connected to the OUTPUT pin (pin 2). Should be soldered to a copper pour tied to VOUT for heatsinking (RθJA = 100 °C/W). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-223 |
| Category | PMIC |
| Pins | 4 |
## Ordering variants
- `CJT1117B-1.8`
## CAD (KiCad official)
- Symbol: `CJT1117B-1.8`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `cjt1117b-1-8-etched.step` / `cjt1117b-1-8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cjt1117b-1-8.step` / `cjt1117b-1-8.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](docs/cjt1117b-1-8-datasheet.pdf) (None pp, sha256 `a86693ffbb7cce0d`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/cjt1117b-1-8-datasheet.pdf)