# LR8341A-T33

**LR** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L

LR8341A-T33 from LR, in a SOT-23-3L. 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 | VSS | power_in | Ground / negative supply reference. All voltages referenced to this pin. |
| 2 | VOUT | power_out | Regulated 3.3V output. Delivers up to 100mA typical (160mA absolute max). Requires a 1-10µF output capacitor close to the pin for stability. |
| 3 | VIN | power_in | Unregulated input supply. Operating range up to 40V (absolute max 55V). VIN must be at least VOUT + dropout (typ 750mV @ 100mA). Bypass with a suitable input capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LR |
| Package | SOT-23-3L |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `LR8341A-T33T25`
- `LR8341A-T33T27`
- `LR8341A-T33T30`
- `LR8341A-T33`
- `LR8341A-T33T36`
- `LR8341A-T33T40`
- `LR8341A-T33T44`
- `LR8341A-T33T50`
- `LR8341A-T33M25`
- `LR8341A-T33M27`
- `LR8341A-T33M30`
- `LR8341A-T33M33`
- `LR8341A-T33M36`
- `LR8341A-T33M40`
- `LR8341A-T33M44`
- `LR8341A-T33M50`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN |  |  | 40 | V | ISS=5uA | 5 |
| Line Regulation | △VOUT | -30 |  | 30 | mV | VOUT+2V≤VIN≤40V, IOUT=5mA | 5 |
| Load Regulation | △VOUT | -50 |  | 50 | mV | VIN=VOUT+2V, 1mA≤IOUT≤100mA | 5 |
| Dropout Voltage | VDrop | 320 | 390 | 450 | mV | IOUT=50mA, △VOUT=±2%*VOUT | 5 |
| Dropout Voltage | VDrop | 600 | 750 | 900 | mV | IOUT=100mA, △VOUT=±2%*VOUT | 5 |
| Quiescent Current | ISS |  | 2 | 5 | uA | VIN=VOUT+2V | 5 |
| Temperature Coefficient | △VOUT/(△Ta*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN=VOUT+1V, IOUT=10mA, -40℃≤Ta≤85℃; printed ±50 typ, ±100 max | 5 |
| Maximum Input Voltage | VIN |  |  | 55 | V |  | 4 |
| Maximum Output Voltage (printed label; value is output current) | IOUT |  |  | 160 | mA |  | 4 |
| Power Dissipation | PD |  |  | 250 | mW | SOT23-3L | 4 |
| Operating Temperature | TOPR | -40 |  | 105 | ℃ |  | 4 |
| Storage Temperature | TSTG | -40 |  | 125 | ℃ |  | 4 |
| ESD Human Body Model |  | -3000 |  | 3000 | V | H.B.M POS/NEG | 4 |
| Junction-to-Ambient Thermal Resistance | θJA |  |  | 500 | °C/W | SOT23-3L | 8 |

## CAD (KiCad official)

- Symbol: `LR8341A-T33`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `lr8341a-t33-etched.step` / `lr8341a-t33-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr8341a-t33.step` / `lr8341a-t33.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`lr8341a-t33.step`](lr8341a-t33.step) | 59 KB | You want the bare part, or you mark your own boards. |
| [`lr8341a-t33-etched.step`](lr8341a-t33-etched.step) | 1.9 MB | You want the part with `LR8341A-T33` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 476 faces against 69 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:** [LR datasheet](docs/lr8341a-t33-datasheet.pdf) (13 pp, sha256 `0ef57f5e903211ad`, 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/lr8341a-t33-datasheet.pdf)