# LD1117S33TR-HXY

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

LD1117S33TR-HXY from HXY MOSFET, in a SOT-223. 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 | GND | power_in | Ground reference pin (labelled Vss/ADJ on the fixed-voltage pinout; Adj/GND in the block diagram, where it is the adjust pin on the ADJ version). |
| 2 | VOUT | power_out | Regulated output (3.3V ±2%, 3.234V to 3.366V for LD1117S33TR) delivering up to 800mA, with a 10uF tantalum output capacitor recommended for stability. |
| 3 | VIN | power_in | Input supply pin, absolute maximum 18V and recommended operating maximum 15V, with 10uF tantalum bypass capacitor recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOT-223 |
| 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 |
|---|---|---|---|---|---|---|---|
| Output voltage (LD1117S33TR, 3.3V fixed) | Vout | 3.234 | 3.3 | 3.366 | V | 0≤Iout≤800mA , Vin=5.3V | 3 |
| Reference voltage | Vref | 1.225 | 1.25 | 1.275 | V |  | 3 |
| Line regulation | ΔVout |  | 0.03 | 0.2 | %/V | Iout=10mA, 4.8V≤Vin≤12V | 3 |
| Load regulation | ΔVout |  | 6 | 24 | mV | Vin =4.8V, 10mA≤Iout≤800mA | 3 |
| Dropout voltage | Vdrop |  | 1.2 | 1.3 | V | Iout =100mA | 4 |
| Dropout voltage | Vdrop |  | 1.3 | 1.5 | V | Iout=800mA | 4 |
| Quiescent current (LD1117S33TR) | Iq |  | 2 | 5 | mA | Vin=12V | 4 |
| Temperature coefficient | ΔV/ΔT | -100 |  | 100 | ppm |  | 4 |
| Input voltage (maximum operating range) |  |  |  | 15 | V | Range of operation input voltage | 1 |
| Ambient operating temperature |  | -20 |  | 85 | °C | Environment temperature | 1 |
| Recommended operating junction temperature | Tj | -20 |  | 125 | °C |  | 2 |
| Maximum input voltage | VIN |  |  | 18 | V |  | 2 |
| Maximum operating junction temperature |  |  |  | 150 | °C |  | 2 |
| Storage temperature | TS | -55 |  | 150 | °C |  | 2 |
| Thermal resistance, junction-to-ambient (SOT-223) | θJA |  | 20 |  | °C/W |  | 2 |
| Thermal resistance, junction-to-case (SOT-223) | θJC |  | 20 |  | °C/W |  | 4 |

## CAD (KiCad official)

- Symbol: `LD1117S33TR-HXY`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `ld1117s33tr-hxy-etched.step` / `ld1117s33tr-hxy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ld1117s33tr-hxy.step` / `ld1117s33tr-hxy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604438961397768192) (8 pp, sha256 `6beb650f3d0a7188`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/ld1117s33tr-hxy-datasheet.pdf)