component
LKP2872ST-5
Public Made by Adomby adom
LKWIC Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLKP2872ST-5
LKWIC · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
LKP2872ST-5 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 (1.8V to 15V recommended operating, ±18V absolute maximum); a 1μF to 10μF ceramic capacitor to GND is recommended. |
| 2 | GND | power_in | Ground pin. |
| 3 | SHDN# | input | Output shutdown pin that must be connected to IN, and the device will not operate if it is left floating. |
| 4 | BYP | passive | On fixed-output versions such as the -5, a 0.01μF ceramic capacitor between BYP and OUT reduces noise to 20μVRMS (10Hz to 100kHz), and the pin must be left floating if unused (shown as BYP/ADJ on pin 4; ADJ applies only to the adjustable version). |
| 5 | OUT | power_out | Regulated output pin (5V for the -5 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/SHDN# pins), absolute maximum | VIN | 18 | V | 5 | |||
| BYP pin voltage, absolute maximum | 0.6 | V | 5 | ||||
| Output voltage (OUT pin), absolute maximum | VOUT | 18 | V | 5 | |||
| Storage temperature, absolute maximum | TSTG | -65 | 150 | ℃ | 5 | ||
| Junction temperature, absolute maximum | Tj | 150 | ℃ | 5 | |||
| Input voltage (IN pin), recommended operating | VIN | 1.8 | 15 | V | 5 | ||
| Operating temperature, recommended operating | TA | -40 | 125 | ℃ | 5 | ||
| Output voltage, LKP2872ST-5 | 4.85 | 5 | 5.12 | V | 6V < VIN < 18V, 1mA < ILOAD < 100mA | 6 | |
| Minimum input voltage | 1.8 | 2.3 | V | ILOAD = 100mA | 6 | ||
| Line regulation, LKP2872ST-5 | 1 | 10 | mV | ILOAD = 1mA | 6 | ||
| Load regulation, LKP2872ST-5 | 25 | 150 | mV | VIN = 6V, ΔILOAD = 1mA～100mA | 6 | ||
| Dropout voltage | 0.1 | 0.19 | V | ILOAD = 1mA | 6 | ||
| Dropout voltage | 0.17 | 0.29 | V | ILOAD = 10mA | 6 | ||
| Dropout voltage | 0.24 | 0.38 | V | ILOAD = 50mA | 6 | ||
| Dropout voltage | 0.3 | 0.45 | V | ILOAD = 100mA | 6 | ||
| GND pin current | 20 | 45 | μA | ILOAD = 0mA | 6 | ||
| GND pin current | 55 | 100 | μA | ILOAD = 1mA | 6 | ||
| GND pin current | 230 | 400 | μA | ILOAD = 10mA | 6 | ||
| GND pin current | 1 | 2 | mA | ILOAD = 50mA | 6 | ||
| GND pin current | 2.2 | 4 | mA | ILOAD = 100mA | 6 | ||
| Ripple rejection | 55 | 65 | dB | VIN, VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 50mA | 6 | ||
| Current limit | 110 | mA | VIN = VOUT(NOMINAL) + 1V 或 2.3V, ΔVOUT = -5% | 6 | |||
| Reverse input leakage current | 1 | mA | VIN = -12V, VOUT = 0V | 6 | |||
| Reverse output current, LKP2872ST-5 | 10 | 20 | μA | VOUT = 5V, VIN < 5V | 6 | ||
| Output voltage noise | 20 | μVRMS | COUT = 10μF, CBYP = 0.01μF, ILOAD = 100mA, BW = 10Hz～100kHz | 6 | |||
| Current limit | 200 | mA | VIN = 7V, VOUT = 0V | 6 | |||
| 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-5 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
lkp2872st-5-etched.step/lkp2872st-5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lkp2872st-5.step/lkp2872st-5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LKWIC datasheet (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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).