# CJT1117B-5.0

**Jiangsu** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

CJT1117B-5.0 from Jiangsu, 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-5.0 this pin is tied to the internal feedback divider and must be connected to system ground. |
| 2 | OUTPUT | power_out | Regulated 5.0V output (4.9V min, 5.1V max over 10mA-1A load, 6.5V-12V input). Requires a 22uF tantalum (or equivalent) output capacitor for stability. Delivers up to 1A continuous. |
| 3 | IN | power_in | Unregulated input voltage. Recommended operating input is up to 15V; absolute max 20V. For 5.0V output requires VIN >= 6.5V to stay in regulation. A 10uF tantalum input bypass capacitor is recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu |
| Package | SOT-223 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `CJT1117B-5.0`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage (fixed 5.0 V, IOUT=10 mA) | VO | 4.925 | 5 | 5.075 | V | IOUT=10mA, VIN=7.0V | 3 |
| Output voltage (10 mA to 1 A load) | VO | 4.9 | 5 | 5.1 | V | 10mA≤IOUT≤1A, 6.5V≤VIN≤12V | 3 |
| Line regulation | LNR |  |  | 10 | mV | IOUT=10mA, 1.5V≤VIN-VOUT≤7V | 3 |
| Load regulation | LDR |  |  | 20 | mV | VIN-VOUT=1.5V, 10mA≤IOUT≤1A | 3 |
| Dropout voltage | VD |  |  | 1.3 | V | ΔVREF=1%, IOUT=1.0A | 3 |
| Quiescent current | Iq |  |  | 10 | mA | VIN= VOUT+1.25V (ADJ except) | 3 |
| Ripple rejection | RR | 60 | 75 |  | dB | f=120Hz,COUT=22μFTantalum, VIN-VOUT=3V, IOUT=1A | 3 |
| Adjust pin current |  |  | 60 | 120 | μA |  | 3 |
| Input voltage (absolute maximum) | Vi |  |  | 20 | V |  | 2 |
| Junction temperature (absolute maximum) | Tj |  |  | 150 | ℃ |  | 2 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 2 |
| Lead temperature (soldering) | TL |  |  | 260 | ℃ | Soldering, 10s | 2 |
| ESD voltage (machine model) | VESD |  |  | 400 | V | Machine Model | 2 |
| Input voltage (recommended operating) | Vi |  |  | 15 | V |  | 2 |
| Operating junction temperature | Tj | -40 |  | 125 | ℃ |  | 2 |
| Thermal resistance, junction to ambient | RθJA |  | 100 |  | ℃/W |  | 2 |

## CAD (KiCad official)

- Symbol: `CJT1117B-5.0`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `cjt1117b-5-0-etched.step` / `cjt1117b-5-0-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cjt1117b-5-0.step` / `cjt1117b-5-0.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`cjt1117b-5-0.step`](cjt1117b-5-0.step) | 64 KB | You want the bare part, or you mark your own boards. |
| [`cjt1117b-5-0-etched.step`](cjt1117b-5-0-etched.step) | 1.7 MB | You want the part with `CJT1117B-5.0` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 427 faces against 75 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [Jiangsu datasheet](docs/cjt1117b-5-0-datasheet.pdf) (8 pp, sha256 `b0ed54cb65b16a17`, 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-5-0-datasheet.pdf)