component
LGS4084HB5-4.35
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.
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
markdownLGS4084HB5-4.35
Legend Si · Battery Management · SOT-23-5
LGS4084HB5-4.35 from Legend Si, 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 | CHRG | output | Charging indicator open-drain output connected to the LED cathode; it is pulled low to turn the LED on while charging, with LED drive current rated at 5 mA. |
| 2 | GND | power_in | Chip ground, which should be connected to the board ground plane with a large copper area for high-current paths. |
| 3 | BAT | power_out | Battery charging output connected to the battery positive terminal, requiring a ceramic capacitor of at least 10uF effective value to ground. |
| 4 | VCC | power_in | Charger input connected to the supply positive, with absolute maximum rating of -0.3V to 24V (input range 4V to 24V, surge up to 28V) and a bypass ceramic capacitor of at least 10uF effective value placed close to VCC and GND. |
| 5 | PROG | passive | Constant-current charge setting and monitor pin; connect a 1% precision resistor to ground, with IBAT = 1000/RPROG (A-scale, mA with RPROG in kΩ) above 300mA and 900/RPROG below 300mA, and absolute maximum of -0.3V to 6V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Legend Si |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
LGS4084HB5-4.35 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
lgs4084hb5-4-35-etched.step/lgs4084hb5-4-35-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lgs4084hb5-4-35.step/lgs4084hb5-4-35.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Legend Si datasheet (15 pp, sha256
6bed6065a39eb63b, retrieved 2026-10-09, tier: lcsc) - 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).