component
LGS7381
Public Made by Adomby adom
Legend Si Battery Management, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+42@@ -0,0 +1,42 @@+# LGS7381++**Legend Si** · Battery Management · SOT-23-5++LGS7381 from Legend Si, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CE | input | Enable input pin; high level enables charging, low level disables charging; connect to VCC or MCU control. |+| 2 | GND | power_in | Chip ground reference. |+| 3 | BAT | output | Battery charging output pin; connect to battery positive terminal with at least 10μF ceramic capacitor to ground. |+| 4 | VCC | power_in | Power supply input pin with recommended operating voltage 4.5V to 6V; bypass to ground with at least 10μF ceramic capacitor placed close to pin. |+| 5 | PROG | output | Charging current setting and monitoring output pin; pin voltage fixed at 0.05V (SC), 0.1V (TC), or 1V (CC) depending on charging mode; external 1% resistor to ground sets current via IBAT = (VPROG / RPROG) × 1000. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Legend Si |+| Package | SOT-23-5 |+| Category | Power Management (PMIC) |+| Pins | 5 |++## CAD (KiCad official)++- Symbol: `LGS7381`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)+- 3D model files: `lgs7381-etched.step` / `lgs7381-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lgs7381.step` / `lgs7381.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Legend Si datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756398856626561024) (11 pp, sha256 `630ea8fc9f8f8ca1`, retrieved 2026-09-22, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/lgs7381-datasheet.pdf)
page.jsonadded+123@@ -0,0 +1,123 @@+{+ "slug": "lgs7381",+ "version": "0.1.0",+ "type": "component",+ "description": "Legend Si Battery Management, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lgs7381",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lgs7381.kicad_sym",+ "lgs7381.kicad_mod",+ "lgs7381.glb",+ "lgs7381.step",+ "lgs7381.lbr",+ "docs/hero.png",+ "docs/lgs7381-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LGS7381",+ "manufacturer": "Legend Si",+ "package": "SOT-23-5",+ "pin_count": 5,+ "category": "Power Management (PMIC)",+ "subcategory": "Battery Management",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756398856626561024",+ "parts": {+ "symbol": "lgs7381.kicad_sym",+ "footprint": "lgs7381.kicad_mod",+ "model_3d": "lgs7381-etched.glb",+ "model_3d_plain": "lgs7381.glb",+ "model_3d_step": "lgs7381-etched.step",+ "model_3d_step_plain": "lgs7381.step",+ "lbr": "lgs7381.lbr"+ },+ "distributor_links": {+ "lcsc": "C5299900"+ },+ "pins": [+ {+ "number": "1",+ "name": "CE",+ "type": "input",+ "description": "Enable input pin; high level enables charging, low level disables charging; connect to VCC or MCU control."+ },+ {+ "number": "2",+ "name": "GND",+ "type": "power_in",+ "description": "Chip ground reference."+ },+ {+ "number": "3",+ "name": "BAT",+ "type": "output",+ "description": "Battery charging output pin; connect to battery positive terminal with at least 10μF ceramic capacitor to ground."+ },+ {+ "number": "4",+ "name": "VCC",+ "type": "power_in",+ "description": "Power supply input pin with recommended operating voltage 4.5V to 6V; bypass to ground with at least 10μF ceramic capacitor placed close to pin."+ },+ {+ "number": "5",+ "name": "PROG",+ "type": "output",+ "description": "Charging current setting and monitoring output pin; pin voltage fixed at 0.05V (SC), 0.1V (TC), or 1V (CC) depending on charging mode; external 1% resistor to ground sets current via IBAT = (VPROG / RPROG) × 1000."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 11,+ "cost_usd": 0.1261,+ "at": "2026-09-22T06:23:12"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756398856626561024",+ "pages": 11,+ "sha256": "630ea8fc9f8f8ca1",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 5,+ "described": 5,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}