UC2844BD1R2G

@@ -0,0 +1,56 @@+# UC2844BD1R2G++**onsemi** · AC-DC Controllers and Regulators · SOIC-8++UC2844BD1R2G from onsemi, in a SOIC-8. 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 | Compensation | output | Error amplifier output, used for loop compensation. Typically tied to Voltage Feedback (pin 2) through an R-C network to set the closed-loop bandwidth and phase margin. Output swings from ~0.8 V (low) up to ~6.2 V (high) with ~1 mA source / 12 mA sink capability. |+| 2 | Voltage Feedback | input | Inverting input of the internal error amplifier. Normally connected to the switching-supply output through a resistor divider; internal reference is 2.5 V. Input bias current typically -0.1 µA, max -1.0 µA (UC284xB) at V_FB = 5.0 V. |+| 3 | Current Sense | input | Input to the PWM current-sense comparator. A voltage proportional to the switch/inductor current (developed across an external current-sense resistor) is applied here. Peak comparator threshold is 1.0 V typical (max 1.1 V); internal current-sense-to-output voltage gain A_V = 3.0 V/V. |+| 4 | RT/CT | passive | Oscillator timing pin. An external resistor R_T from Vref to this pin and a timing capacitor C_T from this pin to GND set the oscillator frequency (f_OSC ≈ 1.72 / (R_T·C_T) for R_T > 5 kΩ). Also sets the maximum output duty cycle (~50% max via internal blanking on alternate cycles). |+| 5 | GND | power_in | Device ground (single ground pin on the 8-pin package; combined signal and power return). All bypass capacitors and the current-sense resistor should return here with a low-impedance path. |+| 6 | Output | output | High-current totem-pole gate-drive output for driving an external power MOSFET. Rated 1.0 A peak source/sink; typical rise/fall time 50 ns into 1.0 nF. Output is held low with V_CC below the UVLO threshold. |+| 7 | VCC | power_in | Positive supply input for control logic and gate driver. UC2844B UVLO turn-on = 16 V typ, turn-off = 10 V typ (large hysteresis for bootstrap start-up). Startup current 0.3 mA typ; operating current 12 mA typ. Absolute max 36 V (internally clamped by zener; limit I_CC + I_Z ≤ 30 mA). |+| 8 | Vref | power_out | Trimmed 5.0 V reference output (±1% at 25 °C, I_O = 1.0 mA). Sources up to ~20 mA for external circuitry; internally current-limited to -85 mA (typ) short-circuit. Bypass to GND with a low-ESR ceramic capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `UC2844BD1R2GD1`+- `UC2844BD1R2GD1G`+- `UC2844BD1R2GD1R2`+- `UC2844BD1R2GD1R2G`+- `UC2844BD1R2GN`+- `UC2844BD1R2GNG`+- `UC2844BD1R2GD`+- `UC2844BD1R2GDG`+- `UC2844BD1R2GDR2`+- `UC2844BD1R2GDR2G`++## CAD (KiCad official)++- Symbol: `UC2844BD1R2G`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/uc2844bd1r2-d.pdf) (19 pp, sha256 `e69ff39fc0ea9e08`, retrieved 2026-08-17, tier: manufacturer)+- **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/uc2844bd1r2g-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "uc2844bd1r2g",+  "version": "0.1.0",+  "type": "component",+  "description": "onsemi AC-DC Controllers and Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "pmic",+    "uc2844bd1r2g"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "uc2844bd1r2g.kicad_sym",+    "uc2844bd1r2g.kicad_mod",+    "uc2844bd1r2g.glb",+    "uc2844bd1r2g.step",+    "uc2844bd1r2g.lbr",+    "docs/hero.png",+    "docs/uc2844bd1r2g-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file