ME4054BM5G-N

@@ -0,0 +1,44 @@+# ME4054BM5G-N++**MICRONE** · Battery Management · SOT-23-5++ME4054BM5G-N from MICRONE, 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 | CHRG | output | Open-drain charge status output. Pulled low by an internal N-channel switch while a charge cycle is in progress; high-impedance otherwise (VOL ≈ 0.3 V at ICHRG = 5 mA, max 0.6 V). Absolute max pin voltage 6.5 V. Tie through an LED+resistor (typ 1 kΩ) to VCC or leave with a pull-up. |+| 2 | GND | power_in | Device ground. Return for VCC, BAT, and PROG. Must be tied to the PCB ground plane; also serves as the primary thermal path for the SOT-23-5. |+| 3 | BAT | power_out | Battery connection pin. Sources up to 500 mA of charge current to the single-cell Li-Ion cell and regulates the float voltage to 4.2 V ±1%. In shutdown/sleep mode BAT sink current drops to <2 µA. Absolute max voltage −0.3 to 6.5 V; absolute max current 500 mA. |+| 4 | VCC | power_in | Positive input supply (typ 5 V, operating 4.0-6.5 V; recommended ≤5.5 V at 0.5 A charge). Powers all internal circuitry and the pass MOSFET. When VCC drops within ~80 mV of VBAT (VASD), the device enters low-power sleep mode (IBAT < 2 µA). Bypass with a 1 µF capacitor to GND. |+| 5 | PROG | passive | Charge-current program and monitor pin. A resistor RPROG from PROG to GND sets the constant-current charge level: ICHG = 1000 V / RPROG (e.g. 2 kΩ → 500 mA, 10 kΩ → 100 mA). Regulated to 1 V in CC mode and 0.1 V in precharge; measuring VPROG gives IBAT = 1000·VPROG/RPROG. Leaving PROG floating puts the chip into disable/shutdown mode. Absolute max −0.3 V to VCC+0.3 V, 800 µA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | MICRONE |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `ME4054BM5G-N`++## CAD (KiCad official)++- Symbol: `ME4054BM5G-N`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [MICRONE datasheet](docs/me4054bm5g-n-datasheet.pdf) (16 pp, sha256 `37421ce407777cbc`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/me4054bm5g-n-datasheet.pdf)

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