# LR8342A-T33

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

LR8342A-T33 from LR, in a SOT-23-3L. 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 pin; all voltages in the datasheet are referenced to GND. |
| 2 | VOUT | power_out | Regulated output voltage pin, 3.3 V for the LR8342A-T33 with ±2% output tolerance and up to 250 mA maximum output current. |
| 3 | VIN | power_in | Input voltage pin; maximum input supply voltage is 45 V absolute maximum, with the datasheet stating a 40 V maximum operating voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LR |
| Package | SOT-23-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum input supply voltage | VIN |  |  | 45 | V |  | 5 |
| Maximum output current | IOUT |  |  | 250 | mA |  | 5 |
| Power dissipation, SOT23-3L | PD |  |  | 250 | mW | SOT23-3L | 5 |
| Operating temperature | TOPR | -40 |  | 105 | ℃ |  | 5 |
| Storage temperature | TSTG | -40 |  | 150 | ℃ |  | 5 |
| Nominal output voltage (ordering table, T33 = 3.3V) | VOUT |  | 3.3 |  | V |  | 2 |
| Output voltage tolerance | VOUT | -2 |  | 2 | % | VIN=12V, IOUT=1mA, CIN=COUT=1uF, TJ=25℃ (table header) | 5 |
| Line regulation | ΔVLINE |  | 2 | 12 | mV | VIN=VOUT + 1V to 40V | 5 |
| Load regulation | ΔVLOAD |  | 20 | 30 | mV | IOUT= 1mA to 100mA | 5 |
| Load regulation | ΔVLOAD |  | 50 | 80 | mV | IOUT= 1mA to 250mA | 5 |
| Dropout voltage | VDROP |  | 400 |  | mV | IOUT=100mA | 5 |
| Dropout voltage | VDROP |  | 1200 |  | mV | IOUT=250mA | 5 |
| Quiescent current | IQ |  | 1.5 | 4 | uA | TJ= 25℃ | 5 |
| Current limit | ICL | 270 |  | 340 | mA | VIN=12V, IOUT=1mA, CIN=COUT=1uF, TJ=25℃ (table header) | 5 |
| Thermal shutdown | TSD |  | 140 |  | ℃ |  | 5 |
| Thermal shutdown hysteresis | THY |  | 20 |  | ℃ |  | 5 |
| Input/output capacitor recommended range | CIN, COUT | 1 |  | 10 | uF | Layout recommendation | 8 |
| Input series resistor (recommended) |  |  | 10 |  | Ω | Recommended about 10Ω in series at LDO input to absorb input spikes | 8 |

## CAD (KiCad official)

- Symbol: `LR8342A-T33`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `lr8342a-t33-etched.step` / `lr8342a-t33-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr8342a-t33.step` / `lr8342a-t33.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LR datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603364094950842368) (10 pp, sha256 `63c3feea885d4d62`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/lr8342a-t33-datasheet.pdf)