component
LM2671MX-5.0
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
markdownLM2671MX-5.0
Texas Instruments · DC-DC Converters · SOIC-8
LM2671MX-5.0 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 the high-side driver. Connect a high-quality 100-nF capacitor from CB to the VSW pin to develop the boot voltage that drives the internal high-side FET gate. |
| 2 | SS | input | Soft-start pin. Connect a capacitor from this pin to GND to control the output voltage ramp rate at startup. May be left floating if soft-start is not desired. |
| 3 | SYNC | input | Switching-clock synchronization input. If left open-circuited, the regulator switches at the internal oscillator frequency (typically 260 kHz). Drive with an external clock to synchronize. |
| 4 | FB | input | Feedback sense input pin. For the fixed 5.0-V version, connect this pin directly to the output capacitor (VOUT). Feedback trace must be kept short to minimize noise pickup. |
| 5 | ON/OFF | input | Enable input to the voltage regulator. High = ON, low = OFF. Pull high or float to enable the regulator; absolute-max is -0.1 V to 6 V. |
| 6 | GND | power_in | Power ground pin. Connect to system ground and to the ground pins of CIN and COUT. Path to CIN must be as short as possible to minimize switching noise. |
| 7 | VIN | power_in | Supply input pin to the collector/drain of the internal high-side FET. Operating range 6.5 V to 40 V (absolute max 45 V). Connect input bypass capacitor CIN with a short path to GND. |
| 8 | VSW | output | Source pin of the internal high-side FET; the switching node. Attach to the inductor and the cathode of the external catch diode. Absolute-max swing to -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.
LM2671MX-5.0LM2671MX-5.0M-5.0LM2671MX-5.0N-5.0LM2671MX-5.0SD-5.0
CAD (KiCad official)
- Symbol:
LM2671MX-5.0 - 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 (36 pp, sha256
493dd6e830996059, 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).