LM2733XMFX
Public Unreviewedby Ray
Texas Instruments DC-DC Converters, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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Open full view ↗Datasheet
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README
markdownLM2733XMFX
Texas Instruments · DC-DC Converters · SOT-23-5
LM2733XMFX from Texas Instruments, in a SOT-23-5. 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 | SW | output | Drain of the internal 40-V, 1-A DMOS FET switch. Connect to the boost inductor and the anode of the rectifier (Schottky) diode. |
| 2 | GND | power_in | Analog and power ground return for the device. |
| 3 | FB | input | Feedback pin. Connects to the external resistive divider that sets the output voltage against the internal 1.230-V reference. |
| 4 | SHDN | input | Active-low shutdown control input (logic level, threshold ~1.5 V ON / 0.5 V OFF). Connect to VIN if the shutdown feature is not used. |
| 5 | VIN | power_in | Analog and power input supply. Recommended operating range 2.7 V to 14 V (absolute max 14.5 V). Bypass with a low-ESR ceramic capacitor close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
LM2733XMFXLM2733XMFXYMFLM2733XMFXYMFX
CAD (KiCad official)
- Symbol:
LM2733XMFX - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
lm2733xmfx.step |
85 KB | You want the bare part, or you mark your own boards. |
lm2733xmfx-etched.step |
1.6 MB | You want the part with LM2733XMFX already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 417 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (28 pp, sha256
beacb663f9a9943f, 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).