XT4054K421MR-G

@@ -0,0 +1,48 @@+# XT4054K421MR-G++**NATLINEAR** · Battery Management · SOT-23-5L++XT4054K421MR-G from NATLINEAR, in a SOT-23-5L. 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 MOSFET while charging; high-impedance when charging completes or when the input UVLO condition is detected. Drives an LED to ground; a 1 uF cap from BAT to GND causes the LED to blink rapidly when no battery is present. |+| 2 | GND | power_in | Ground / device reference (VSS). |+| 3 | BAT | power_out | Charge-current output to the Li-Ion battery. Regulates the float voltage to 4.2 V (±1%). Internal reverse-battery protection: with VBAT = -4 V a ~0.7 mA path forms between GND and BAT to protect the internal ESD diode. Requires a >=1 uF decoupling capacitor. |+| 4 | VCC | power_in | Positive supply input to the charger. Operating range 4.25 V to 6.5 V (absolute max 7 V); requires at least 1 uF bypass capacitance. When VCC falls within ~30 mV of VBAT the device enters shutdown and BAT current drops below 2 uA. |+| 5 | PROG | bidirectional | Charge-current program, current-monitor, and shutdown pin. A 1% resistor to GND sets IBAT = (VPROG/RPROG) x 1000; VPROG = 1 V in constant-current mode. Floating the pin lets an internal 3 uA pull-up raise VPROG; above ~1.21 V the part enters shutdown (ICC ~25 uA). Pin clamps near 2.4 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | NATLINEAR |+| Package | SOT-23-5L |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `XT4054K421MR-GK421MR`+- `XT4054K421MR-GK421ML`+- `XT4054K421MR-GK421PR`+- `XT4054K421MR-GK421PL`++## CAD (KiCad official)++- Symbol: `XT4054K421MR-G`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5L (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [NATLINEAR datasheet](docs/xt4054k421mr-g-datasheet.pdf) (10 pp, sha256 `ddf60b23914cd0af`, retrieved 2026-08-17, 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:** `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/xt4054k421mr-g-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "xt4054k421mr-g",+  "version": "0.1.0",+  "type": "component",+  "description": "NATLINEAR Battery Management, SOT-23-5L. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "pmic",+    "xt4054k421mr-g"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "xt4054k421mr-g.kicad_sym",+    "xt4054k421mr-g.kicad_mod",+    "xt4054k421mr-g.glb",+    "xt4054k421mr-g.step",+    "xt4054k421mr-g.lbr",+    "docs/hero.png",+    "docs/xt4054k421mr-g-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file