FM4057S52

@@ -0,0 +1,57 @@+# FM4057S52++**Shenzhen Fuman** · Battery Management · SOT-23-5++FM4057S52 from Shenzhen Fuman, 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 indicator. Drives an external LED (to VIN through a series resistor): pulled low (LED on) while charging, high-impedance (LED off) when charge terminates. |+| 2 | GND | power_in | Device ground / analog return. Connect directly to the system ground plane. |+| 3 | BAT | power_out | Battery connection and charger output. Sources the constant-current / constant-voltage charge current to the single-cell Li-ion pack. Regulated to 4.2V (S52), with battery-OVP at ~104% of VBAT_FULL and recharge threshold ~4.05V. Bypass with a 10µF ceramic capacitor to GND. |+| 4 | VIN | power_in | Charger power input. Recommended 4.2-6.5V operating range, absolute-max 32V (the part's headline 32V input tolerance). VIN UVLO rising ~4.6V / falling ~4.2V; VIN OVP ~6.5V. A 1µF ceramic bypass to GND is recommended (may be omitted per app circuit). |+| 5 | ISET | input | Charge-current programming pin. A resistor from ISET to GND sets the constant-current charge level: RISET ≈ 3kΩ → 1.0A, 5kΩ → 0.6A, 6kΩ → 0.5A. Precharge current is ~60mA and termination current is ~60mA at RISET=5kΩ. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shenzhen Fuman |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `FM4057S52S52`+- `FM4057S52BS52`+- `FM4057S52S53`+- `FM4057S52S54`+- `FM4057S52S42`+- `FM4057S52S43`+- `FM4057S52S44`+- `FM4057S52E42`+- `FM4057S52BE42`+- `FM4057S52E43`+- `FM4057S52E44`+- `FM4057S52D42`+- `FM4057S52D43`+- `FM4057S52D44`++## CAD (KiCad official)++- Symbol: `FM4057S52`+- 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:** [Shenzhen Fuman datasheet](docs/fm4057s52-datasheet.pdf) (14 pp, sha256 `bfc23830eabbc3b5`, 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/fm4057s52-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "fm4057s52",+  "version": "0.1.0",+  "type": "component",+  "description": "Shenzhen Fuman Battery Management, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "pmic",+    "fm4057s52"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "fm4057s52.kicad_sym",+    "fm4057s52.kicad_mod",+    "fm4057s52.glb",+    "fm4057s52.step",+    "fm4057s52.lbr",+    "docs/hero.png",+    "docs/fm4057s52-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file