XL2843

@@ -0,0 +1,43 @@+# XL2843++**XINLUDA** · AC-DC Controllers and Regulators · SOP-8++XL2843 from XINLUDA, in a SOP-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 | COMP | output | Error Amplifier output; made available for external loop compensation (typically an R-C network to VFB). |+| 2 | VFB | input | Inverting input of the internal Error Amplifier. Normally connected to the switching supply output via a resistor divider; internal reference at this node is 2.50 V. |+| 3 | ISENSE | input | Current-sense input. A voltage proportional to inductor/switch current is applied here; the PWM comparator terminates the output pulse when this pin reaches ~1 V, providing cycle-by-cycle current limiting. |+| 4 | RT/CT | passive | Oscillator timing pin. Connect RT from VREF to this pin and CT from this pin to GND to program the oscillator frequency and maximum duty cycle. Operation up to 500 kHz. |+| 5 | GROUND | power_in | Combined control-circuitry and power ground. Reference for all voltages; timing and bypass caps must be returned here in a single-point ground. |+| 6 | OUTPUT | output | Totem-pole gate-drive output for an external N-channel power MOSFET. Sources and sinks peak currents up to ±1 A; low in the OFF state. VOH typ 13.5 V @ 200 mA source, VOL typ 1.6 V @ 200 mA sink. |+| 7 | VCC | power_in | Positive supply for the control IC. Recommended operating supply 12-28 V; UVLO turn-on 8.4 V typ, turn-off 7.6 V typ (XL2843). Absolute max low-impedance supply 30 V; internal zener clamps at ~34 V. |+| 8 | VREF | power_out | Buffered 5.0 V trimmed reference output (5.00 V typ, ±1% at 25 °C). Supplies charging current for CT through RT; source current limited to 20 mA (recommended), internally short-circuit protected. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | XINLUDA |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `XL2843`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [XINLUDA datasheet](docs/xl2843-datasheet.pdf) (17 pp, sha256 `382dd1be0888bf48`, 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/xl2843-datasheet.pdf)

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