# ASPL1117-3.3-DT-R

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

ASPL1117-3.3-DT-R from ASDsemi, 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/ADJ | power_in | Ground reference on the fixed 3.3V version (ADJ pin on the adjustable version, where a bypass capacitor CADJ to ground can improve ripple rejection). |
| 2 | VOUT | power_out | Regulated 3.3V output (3.234 to 3.366V) with up to 0.9A maximum output current, recommended 10uF tantalum output capacitor for stability. |
| 3 | VIN | power_in | Input supply with a maximum of 24V and about 1.3V dropout at 0.9A, recommended 10uF tantalum bypass capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ASDsemi |
| 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 (ASPL1117-3.3) | Vout | 3.234 | 3.3 | 3.366 | V | 0≤Iout≤0.9A, Vin=5.3V | 3 |
| Load regulation (ASPL1117-3.3) | △Vout |  | 6 | 24 | mV | Vin =4.8V, 10mA≤Iout≤0.9A | 3 |
| Line regulation (row printed ASPL1117-3.3L) | ΔVout |  | 0.03 | 0.2 | %/V | Iout=10mA, 4.8V≤Vin≤12V | 3 |
| Dropout voltage | Vdrop |  | 1.23 | 1.3 | V | Iout =100mA | 4 |
| Dropout voltage | Vdrop |  | 1.3 | 1.5 | V | Iout=1A | 4 |
| Current limit | Ilimit |  | 0.8 | 0.9 | A | Vin-Vout=2V;Tj =25℃ | 4 |
| Quiescent current (ASPL1117-3.3) | Iq |  | 2 | 5 | mA | ASPL1117-3.3,Vin=12V | 4 |
| Ripple rejection (PSRR) | PSRR |  | -65 |  | dB | f=100Hz, Cout=104 | 4 |
| Ripple rejection (PSRR) | PSRR |  | -60 |  | dB | f=10KHz, Cout=104 | 4 |
| Ripple rejection (PSRR) | PSRR |  | -57 |  | dB | f=22KHz, Cout=104 | 4 |
| Temperature coefficient | ΔV/ΔT | -100 |  | 100 | ppm |  | 4 |
| Thermal resistance junction-to-case | θJC |  | 20 |  | ℃/W | SOT-223 | 4 |
| Max input voltage |  |  |  | 24 | V |  | 2 |
| Max power dissipation | Pd |  |  | 1 | W |  | 2 |
| Max output current |  |  |  | 0.9 | A |  | 2 |
| Recommended operating junction temperature | Tj | -20 |  | 125 | ℃ |  | 2 |
| Max operating junction temperature | Tj |  |  | 150 | ℃ |  | 2 |
| Ambient temperature | Ta | -20 |  | 85 | ℃ |  | 2 |
| Storage temperature | Ts | -40 |  | 150 | ℃ |  | 2 |
| Lead temperature and time |  |  |  | 260 | ℃ | 10S | 2 |

## CAD (KiCad official)

- Symbol: `ASPL1117-3.3-DT-R`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `aspl1117-3-3-dt-r-etched.step` / `aspl1117-3-3-dt-r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `aspl1117-3-3-dt-r.step` / `aspl1117-3-3-dt-r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ASDsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906774769881088) (9 pp, sha256 `638426a95087aeec`, 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/aspl1117-3-3-dt-r-datasheet.pdf)