component
LK7550-S
Public Made by Adomby adom
LANKE Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3L. 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
markdownLK7550-S
LANKE · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L
LK7550-S from LANKE, 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 | VSS | power_in | Ground reference pin of the regulator, labelled VSS on the SOT23-3 top-view drawing and GND in the functional block diagram. |
| 2 | VOUT | power_out | Regulated 5.0V output (typ. for LK7550) that supplies up to 150mA, with 1-10uF recommended for the output capacitor C2. |
| 3 | VIN | power_in | Unregulated input supply that accepts 2-30V (30V maximum in the electrical table, 36V absolute maximum). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LANKE |
| 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 |
|---|---|---|---|---|---|---|---|
| Output voltage | VOUT | 4.9 | 5 | 5.1 | V | VIN=7.0V, IOUT=10mA | 4 |
| Line regulation | 0.05 | 0.2 | %/V | 6.0V<=VIN<=40V, IOUT=5mA | 4 | ||
| Load regulation (delta VOUT) | ΔVOUT | 30 | 50 | mV | VIN=7.0V, 1mA<=IOUT<=110mA | 4 | |
| Dropout voltage | Vd | 400 | 500 | mV | IOUT=100mA, ΔVOUT=±2% | 4 | |
| Quiescent current | ISS | 2 | 3 | uA | IOUT=0mA | 4 | |
| Output current | IOUT | 150 | mA | VIN=7.0V | 4 | ||
| Short-circuit protection current | 60 | mA | Output short-circuited | 4 | |||
| Input voltage | VIN | 30 | V | 4 | |||
| Input voltage | VIN | 36 | V | 3 | |||
| Output current | IOUT | 200 | mA | 3 | |||
| Operating temperature | TOPR | -40 | 85 | °C | 3 | ||
| Storage temperature | TSTG | -40 | 125 | °C | 3 | ||
| Soldering temperature | Tj | 260 | °C | 3 | |||
| ESD rating, human body model | ESD(HBM) | 2000 | V | HBM | 3 | ||
| External capacitors C1, C2 (recommended) | C1, C2 | 1 | 10 | uF | Typical application circuit | 2 |
CAD (KiCad official)
- Symbol:
LK7550-S - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
lk7550-s-etched.step/lk7550-s-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lk7550-s.step/lk7550-s.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LANKE datasheet (6 pp, sha256
95e8dbab449ed223, retrieved 2026-10-19, 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-haiku-5-5(text), consensusclaude-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).