# LKP2872ST-30

**LKWIC** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

LKP2872ST-30 from LKWIC, in a SOT-23-5. 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 | IN | power_in | Input supply pin (operating 1.8V to 15V, absolute maximum ±18V); a 1μF to 10μF ceramic capacitor to GND is recommended. |
| 2 | GND | power_in | Ground pin. |
| 3 | SHDN# | input | Active-low shutdown input that must be connected to IN, and the device will not operate if this pin is left floating. |
| 4 | BYP | passive | Bypass pin on the fixed-output version: a 0.01μF ceramic capacitor to OUT reduces noise to 20μVRMS (10Hz to 100kHz), and it must be left floating if unused (pin 4 is labeled BYP/ADJ; ADJ applies only to the adjustable version). |
| 5 | OUT | power_out | Regulated output pin (3.0V for the -30 version, up to 100mA); connect a ceramic or tantalum capacitor of at least 1μF to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LKWIC |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## 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 (IN) | VIN | 1.8 |  | 15 | V |  | 6 |
| Input voltage (IN/SHDN# pin) | VIN |  |  | 18 | V |  | 6 |
| Output voltage (OUT pin) | VOUT |  |  | 18 | V |  | 6 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 6 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 6 |
| Line regulation LKP2872ST-30 |  |  | 1 | 10 | mV | ILOAD = 1mA | 7 |
| GND pin current |  |  | 1 | 2 | mA | ILOAD = 50mA | 7 |
| Reverse input leakage current |  |  |  | 1 | mA | VIN = -12V, VOUT = 0V | 7 |
| Reverse output current LKP2872ST-30 |  |  | 10 | 20 | μA | VOUT = 3.0V, VIN < 3.0V | 7 |
| Junction-to-case thermal resistance (top) | RθJc |  | 50.18 |  | °C/W |  | 5 |
| Junction-to-case thermal resistance (bottom) | RθJc |  | 178.92 |  | °C/W |  | 5 |

## CAD (KiCad official)

- Symbol: `LKP2872ST-30`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `lkp2872st-30-etched.step` / `lkp2872st-30-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lkp2872st-30.step` / `lkp2872st-30.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LKWIC datasheet](docs/lkp2872st-30-datasheet.pdf) (11 pp, sha256 `36bd3ee8b7e961db`, retrieved 2026-10-17, 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-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/lkp2872st-30-datasheet.pdf)