# LM2623MMX

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

LM2623MMX 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 | PGND | power_in | Power Ground |
| 2 | EN | input | Digital Active-Low Shutdown Input |
| 3 | FREQ | input | Analog Frequency Adjust. An external resistor connected between this pin and a voltage source sets the switching frequency of the LM2623. |
| 4 | FB | input | Analog Output Voltage Feedback |
| 5 | SGND | power_in | Signal Ground |
| 6 | VDD | power_in | Power Supply for Internal Circuitry |
| 7 | BOOT | output | Analog Bootstrap Supply for the Gate Drive of Internal MOSFET Power Switch |
| 8 | SW | output | Analog Drain of the Internal MOSFET Power Switch |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LM2623MMX`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files: `lm2623mmx-etched.step` / `lm2623mmx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2623mmx.step` / `lm2623mmx.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/lm2623) (23 pp, sha256 `2be194644bb431a9`, retrieved 2026-10-06, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/lm2623mmx-datasheet.pdf)