component
LM2675MX-3.3
Public Unreviewedby Ray
Texas Instruments DC-DC Converters, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM2675MX-3.3
Texas Instruments · DC-DC Converters · SOIC-8
LM2675MX-3.3 from Texas Instruments, 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 | CB | passive | Boot-strap capacitor connection for the high-side FET driver. Connect a high-quality 470-nF (typ. 10 nF in typical-application example) capacitor from CB to VSW to supply gate drive above VIN. |
| 2 | NC | unconnected | No connect pin. Leave floating or tie to ground per layout convenience. |
| 3 | NC | unconnected | No connect pin. Leave floating or tie to ground per layout convenience. |
| 4 | FB | input | Feedback sense input. For the fixed 3.3-V version, connect directly to the output capacitor; the internal divider regulates VOUT to 3.3 V (±1.5%). Absolute max VFB = -0.3 V to 14 V. |
| 5 | ON/OFF | input | TTL-compatible enable input for the regulator. High or floating = ON, low = OFF (typ. 50-µA standby current). Absolute max -0.1 V to 6 V. |
| 6 | GND | power_in | Power ground pin. Return for CIN and COUT; keep path from VIN pin to high-frequency bypass CIN and GND as short as possible. |
| 7 | VIN | power_in | Supply input pin to the collector of the internal high-side FET. Recommended operating range 6.5 V to 40 V (absolute max 45 V). Bypass with a low-ESR input capacitor located close to VIN and GND. |
| 8 | VSW | output | Source of the internal high-side FET; switching node. Connect to the inductor and the cathode of the external catch diode. Absolute max switch-voltage-to-ground = -1 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
LM2675MX-3.3LM2675MX-3.3M-3.3LM2675MX-3.3N-3.3LM2675MX-3.3SD-3.3LM2675MX-3.3SDX-3.3
CAD (KiCad official)
- Symbol:
LM2675MX-3.3 - 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: Texas Instruments datasheet (33 pp, sha256
324342d0eaad04c2, 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).