# JY1117E33AX

**Shenzhen JingYang** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

JY1117E33AX from Shenzhen JingYang, in a SOT-223-4. 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 fixed-output 3.3 V version. On the adjustable variant this same pin is the Adj feedback input; because JY1117E33AX is a fixed-mode part, it is tied to system ground. Per datasheet 'Ground only for Fixed-Mode'. |
| 2 | VOUT | power_out | Regulated 3.3 V output (typ 3.300 V, min 3.235 V, max 3.365 V at IOUT=10 mA). Rated for 1 A continuous. Requires a minimum 0.2 µF X7R/X5R MLCC (or 3.3 µF EL, 10 mΩ ≤ ESR ≤ 1 Ω) from this pin to ground for stability. The SOT-223 tab is internally connected to VOUT and serves as the heat-sink pad. |
| 3 | VIN | power_in | Regulator input supply, 2.7 V to 12 V operating (abs max -0.3 V to 15 V). Must be at least VOUT + 1.4 V (dropout) to regulate; datasheet recommends at least 1.5 V headroom above VOUT. A local input storage capacitor to ground is required to prevent the input from sagging below the dropout during load transients. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen JingYang |
| Package | SOT-223-4 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `JY1117E33AX`
- `JY1117E33AXEXX`
- `JY1117E33AXEXXA`
- `JY1117E33AXD33`
- `JY1117E33AXD33A`
- `JY1117E33AXDXX`
- `JY1117E33AXDXXA`
- `JY1117E33AXF33`
- `JY1117E33AXF33A`
- `JY1117E33AXFXX`
- `JY1117E33AXFXXA`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operation Input Voltage |  | 2.7 |  | 12 | V |  | 5 |
| Reference Voltage |  | 1.225 | 1.25 | 1.275 | V | IOUT = 10mA, TJ=25°C, (VIN-OUT)=1.5V | 5 |
| Output Voltage (-3.3) |  | 3.235 | 3.3 | 3.365 | V | IOUT = 10mA, TJ = 25°C, 4.8V≤VIN≤12V | 5 |
| Line Regulation |  |  | 0.2 | 0.5 | % | IOUT=10mA, VOUT+1.5V< VIN<12V, TJ=25°C (Note 1,2) | 5 |
| Load Regulation (-3.3) |  |  | 26 | 33 | mV | VIN=5V, 10mA≤IOUT≤1A, TJ=25°C (Note 1,2) | 6 |
| Dropout Voltage | VIN-VOUT |  | 1.2 | 1.4 | V | IOUT = 1A, ΔVOUT=1%VOUT | 6 |
| Current Limit |  | 1 |  |  | A | (VIN-VOUT) = 1.5V | 6 |
| Minimum Load Current |  |  | 5 | 7 | mA | 0°C≤TJ≤125°C | 6 |
| Ripple Rejection |  | 50 | 60 | 70 | dB | F=120Hz, COUT=10μF, 0.2μF, (VIN-VOUT) = 1.5V | 6 |
| DC Supply Voltage | VIN | -0.3 |  | 15 | V |  | 4 |
| Operating Junction Temperature Range | Top | -40 |  | 125 | °C |  | 4 |
| Maximum Junction Temperature | TMJ |  |  | 150 | °C |  | 4 |
| Storage Temperature | TST | -65 |  | 150 | °C |  | 4 |
| Power Dissipation SOT-223 (with heat sink) | PD |  |  | 1300 | mW | Heat sink area 5mm*5mm; TA=25°C, TJ=125°C | 4 |
| Power Dissipation SOT-223 (no heat sink) | PD |  |  | 850 | mW | No heat sink; no air flow; TA=25°C, TJ=125°C | 4 |
| Thermal Resistance Junction-to-Ambient SOT-223 (with heat sink) | TJA |  | 75 |  | °C/W | Note 4: tab connected to 5mm*5mm multi-layer PCB copper area | 6 |
| Thermal Resistance Junction-to-Ambient SOT-223 (no heat sink) | TJA |  | 117 |  | °C/W | No heat sink; no air flow | 6 |
| Thermal Resistance Junction-to-Case SOT-223 | TJC |  | 15 |  | °C/W |  | 6 |

## CAD (KiCad official)

- Symbol: `JY1117E33AX`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `jy1117e33ax-etched.step` / `jy1117e33ax-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jy1117e33ax.step` / `jy1117e33ax.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`jy1117e33ax.step`](jy1117e33ax.step) | 64 KB | You want the bare part, or you mark your own boards. |
| [`jy1117e33ax-etched.step`](jy1117e33ax-etched.step) | 1.6 MB | You want the part with `JY1117E33AX` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 413 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:** [Shenzhen JingYang datasheet](docs/jy1117e33ax-datasheet.pdf) (14 pp, sha256 `fe77cb471f1f490b`, 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/jy1117e33ax-datasheet.pdf)