# LM3489MM

**Texas Instruments** · DC-DC Converters · VSSOP-8-0.65mm

LM3489MM from Texas Instruments, in a VSSOP-8-0.65mm. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ISENSE | input | The current sense input must be connected to the PFET drain terminal directly or through a series resistor up to 600 Ω for 28 V > VIN > 35 V (limit as printed in the datasheet). |
| 2 | GND | power_in | Signal ground for the controller. |
| 3 | EN | input | Enable pin: connect to ground to shut down the part or float to enable operation (internally pulled high and clamped at 8 V typical); recommended EN voltage is 5.5 V maximum, and it can also be used for a UVLO function. |
| 4 | FB | input | Feedback input; connect to a resistor voltage divider between the output and GND to set the adjustable output voltage. |
| 5 | ADJ | input | Current limit threshold adjustment pin tied to an internal 5.5 µA current source; a resistor between this pin and VIN sets the overcurrent threshold compared against the ISENSE voltage. |
| 6 | PGND | power_in | Power ground for the external PFET gate drive. |
| 7 | PGATE | output | Gate drive output for the external PFET, which swings between VIN and VIN minus 5 V. |
| 8 | VIN | power_in | Power supply input pin; recommended VIN supply range is 4.5 V to 35 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LM3489MM`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files: `lm3489mm-etched.step` / `lm3489mm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm3489mm.step` / `lm3489mm.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm3489) (28 pp, sha256 `8486c86e0ce9150d`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lm3489mm-datasheet.pdf)