# LKP2074S-ADJ

**LKWIC** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOP-8

LKP2074S-ADJ from LKWIC, in a SOP-8. 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 | OUT | power_out | Regulated output voltage; connect a capacitor of at least 10µF to GND, placed as close to the OUT pin as possible. |
| 2 | SENSE/ADJ | input | On the adjustable version (LKP2074S-ADJ) this is the adjustable-output pin, with a 1.21V reference set by the R1/R2 divider; on fixed versions it is the output sense pin. |
| 3 | GND | power_in | Ground. |
| 4 | NC | unconnected | Not connected. |
| 5 | SHDN | input | Active-low shutdown: output turns off when pulled low, drivable by a pull-up resistor or 5V logic; must be tied to IN if unused, and the device does not operate if left floating. |
| 6 | GND | power_in | Ground. |
| 7 | GND | power_in | Ground. |
| 8 | IN | power_in | Input voltage (2.5V to 20V operating); connect a 1µF to 10µF capacitor to GND, placed as close to the IN pin as possible. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LKWIC |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## 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 pin) | VIN | 2.5 |  | 20 | V |  | 6 |
| Operating temperature | TA | -40 |  | 125 | ℃ |  | 6 |
| IN pin voltage | VIN |  |  | 20 | V |  | 5 |
| OUT pin voltage | VOUT |  |  | 20 | V |  | 5 |
| Input-output differential voltage | VDR |  |  | 20 | V |  | 5 |
| SENSE pin voltage | VSENSE |  |  | 20 | V |  | 5 |
| ADJ pin voltage | VADJ |  |  | 7 | V |  | 5 |
| SHDN# pin voltage | VSHDN |  |  | 20 | V |  | 5 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 5 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 5 |
| Lead soldering temperature (5s) | Th | 240 |  | 250 | ℃ | 5 s | 5 |
| Output voltage (SENSE/ADJ pin), LKP2074S-ADJ |  | 1.174 | 1.21 | 1.246 | V | 2.5V < VIN < 20V, 1mA < ILOAD < 1.5A | 6 |
| Minimum input voltage |  |  | 2.1 | 2.5 | V | ILOAD = 1.5A | 6 |
| Line regulation, LKP2074S-ADJ |  |  | 1.5 | 5 | mV | ΔVIN = 2.21V～20V, ILOAD = 1mA | 6 |
| Load regulation, LKP2074S-ADJ |  |  | 2 | 15 | mV | VIN = 2.5V, ΔILOAD = 1mA～1.5A | 6 |
| Dropout voltage |  |  | 0.02 | 0.1 | V | VIN = VOUT(NOMINAL), ILOAD = 1mA | 6 |
| Dropout voltage |  |  | 0.1 | 0.22 | V | VIN = VOUT(NOMINAL), ILOAD = 100mA | 6 |
| Dropout voltage |  |  | 0.19 | 0.35 | V | VIN = VOUT(NOMINAL), ILOAD = 500mA | 6 |
| Dropout voltage |  |  | 0.34 | 0.55 | V | VIN = VOUT(NOMINAL), ILOAD = 1.5A | 6 |
| GND pin current |  |  | 1 | 1.5 | mA | VIN = VOUT(NOMINAL)+1V, ILOAD = 0mA | 6 |
| GND pin current |  |  | 1.1 | 1.6 | mA | VIN = VOUT(NOMINAL)+1V, ILOAD = 1mA | 6 |
| GND pin current |  |  | 3.8 | 5.5 | mA | VIN = VOUT(NOMINAL)+1V, ILOAD = 100mA | 6 |
| GND pin current |  |  | 15 | 25 | mA | VIN = VOUT(NOMINAL)+1V, ILOAD = 500mA | 6 |
| GND pin current |  |  | 80 | 120 | mA | VIN = VOUT(NOMINAL)+1V, ILOAD = 1.5A | 6 |
| ADJ pin bias current |  |  | 3 | 10 | μA |  | 6 |
| Shutdown threshold voltage |  |  | 0.9 | 2 | V | VOUT = Off to On | 6 |
| Shutdown threshold voltage |  | 0.25 | 0.75 |  | V | VOUT = On to Off | 6 |
| SHDN# pin current |  |  | 0.01 | 1 | μA | VSHDN# = 0V | 6 |
| SHDN# pin current |  |  | 3 | 30 | μA | VSHDN# = 20V | 6 |
| Shutdown current |  |  | 0.01 | 1 | μA | VIN = 6V, VSHDN# = 0V, TA=25℃ | 6 |
| Ripple rejection |  | 55 | 63 |  | dB | VIN, VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 0.75A, TA=25℃ | 6 |
| Current limit |  |  | 2 |  | A | VIN = 7V, VOUT = 0V | 7 |
| Current limit |  | 1.6 |  |  | A | VIN = VOUT(NOMINAL) + 1V, ΔVOUT = -0.1V | 7 |
| Reverse input leakage current |  |  |  | 1 | mA | VIN = -20V, VOUT = 0V | 7 |
| Reverse output current, LKP2074S-ADJ |  |  | 300 | 600 | μA | VOUT = 1.21V, VIN < 1.21V, TA=25℃ | 7 |
| Output voltage noise |  |  | 40 |  | μVRMS | COUT = 10μF, ILOAD = 1.5A, BW = 10Hz～100kHz | 6 |
| Thermal resistance, junction-to-ambient (8 pins) | RθJA |  | 70 |  | °C/W | 8 pins, junction to ambient; actual value depends on board layout | 6 |

## CAD (KiCad official)

- Symbol: `LKP2074S-ADJ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `lkp2074s-adj-etched.step` / `lkp2074s-adj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lkp2074s-adj.step` / `lkp2074s-adj.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LKWIC datasheet](docs/lkp2074s-adj-datasheet.pdf) (14 pp, sha256 `f1198aa6f1a8f2cc`, 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-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/lkp2074s-adj-datasheet.pdf)