LM3489MMX

@@ -0,0 +1,50 @@+# LM3489MMX++**Texas Instruments** · AC-DC Controllers and Regulators · VSSOP-8++LM3489MMX from Texas Instruments, in a VSSOP-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 | ISENSE | input | Current sense input. Connects to the external PFET drain terminal directly or through a series resistor up to 600 Ω for 28 V > VIN > 35 V. Used with ADJ to set the cycle-by-cycle current limit. |+| 2 | GND | power_in | Signal ground reference for the controller's internal circuitry. |+| 3 | EN | input | Enable pin. Tie EN to ground to shut down the device, or float to enable (internally pulled high, clamped at ~8 V typical). Can also be used to implement a UVLO function. Enable rising threshold typ 1.5 V, hysteresis 130 mV. |+| 4 | FB | input | Feedback input. Connect FB to a resistor voltage divider between the regulated output and GND to set the adjustable output voltage. Internal reference VFB = 1.239 V typical. |+| 5 | ADJ | input | Current limit threshold adjustment. Connected to an internal 5.5-µA current source; a resistor between ADJ and VIN sets a reference voltage that is compared with the ISENSE pin voltage to detect an overcurrent condition. |+| 6 | PGND | power_in | Power ground return for the PFET gate driver output stage. |+| 7 | PGATE | output | Gate drive output for the external PFET. PGATE swings between VIN and (VIN − 5 V). Driver source resistance ~5.5 Ω, sink ~8.5 Ω; peak source current ~0.44 A. |+| 8 | VIN | power_in | Power supply input pin. Operating range 4.5 V to 35 V (absolute max 36 V). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VSSOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `LM3489MMXMM`+- `LM3489MMXMMX`+- `LM3489MMXQMM`+- `LM3489MMXQMMX`++## CAD (KiCad official)++- Symbol: `LM3489MMX`+- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`+- 3D model: VSSOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm3489mmx.pdf) (27 pp, sha256 `8efdf3c39fd516a0`, 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/lm3489mmx-datasheet.pdf)

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