component
LM2674MX-3.3
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownLM2674MX-3.3
Texas Instruments · DC-DC Converters · SOIC-8
LM2674MX-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 | input | Bootstrap capacitor connection for high-side FET gate driver; connect a 10nF ceramic capacitor between CB and VSW pins. |
| 2 | NC | unconnected | No connection pin; leave floating. |
| 3 | NC | unconnected | No connection pin; leave floating. |
| 4 | FB | input | Feedback sense input pin; connect to center of resistive divider for adjustable models or directly to output capacitor for fixed output models. |
| 5 | ON/OFF | input | Enable input to regulator with high voltage enabling and low voltage (below 1.4V) disabling operation; pull high or leave open to enable. |
| 6 | GND | power_in | Power ground reference pin; connect to system ground and to ground terminals of input and output bypass capacitors with minimum PCB trace distance. |
| 7 | VIN | power_in | Power supply input pin to high-side FET (6.5V to 40V operating range); connect to input power source and input bypass capacitor CIN with shortest possible PCB traces. |
| 8 | VSW | output | Source pin of internal high-side MOSFET gate driver serving as switch node; connect to external inductor and freewheeling diode cathode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM2674MX-3.3 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm2674mx-3-3-etched.step/lm2674mx-3-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2674mx-3-3.step/lm2674mx-3-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (41 pp, sha256
a9cee9aefd8786a1, retrieved 2026-09-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).