component
LGS4084HB5
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
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLGS4084HB5
Legend Si · Battery Management · SOT-23-5
LGS4084HB5 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 | Open-drain charge status output that drives an LED through a series resistor (RLED, 1 kΩ in the application examples) to indicate charging. |
| 2 | GND | power_in | Ground reference pin; the datasheet recommends connecting it to the ground plane with vias for EMI and PCB layout. |
| 3 | BAT | power_out | Battery connection that receives the charge current and regulates the battery to the constant-voltage level (4.20 V, or 4.35 V in the 4.35 V option); absolute maximum rating is -0.3 V to 6 V. |
| 4 | VCC | power_in | Input supply pin with an operating range of 4 V to 6 V and an overvoltage protection threshold (VOVP) of 6.25 V; absolute maximum rating is -0.3 V to 28 V. |
| 5 | PROG | passive | Charge-current programming pin; a resistor RPROG to GND sets the charge current via IBAT = (VPROG/RPROG) × 1000 with VPROG of 1 V, and the absolute maximum rating is -0.3 V to 6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Legend Si |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
LGS4084HB5 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
lgs4084hb5-etched.step/lgs4084hb5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lgs4084hb5.step/lgs4084hb5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Legend Si datasheet (12 pp, sha256
5b0673a38e5092e6, 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).