component
LM2673S-5.0
Public Made by Adomby adom
Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, 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
markdownLM2673S-5.0
Texas Instruments · DC-DC Converters · TO-263-7
LM2673S-5.0 from Texas Instruments, in a TO-263-7. 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 | Switch_output | output | Source pin of the internal high-side FET and the switching node; it connects to the inductor and the cathode of the external diode. |
| 2 | Input | power_in | Supply input pin feeding the collector of the high-side FET; connect to the power supply and input bypass capacitor CIN, keeping the path from this pin to CIN and GND as short as possible. |
| 3 | CB | input | Boot-strap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the VSW (switch output) pin. |
| 4 | GND | power_in | Power ground pin; connect to system ground, together with the ground pins of CIN and COUT, keeping the path to CIN as short as possible. |
| 5 | Current_adjust | input | Current limit adjust pin; connect a resistor from this pin to GND to set the current limit of the part. |
| 6 | FB | input | Feedback sense input; for the fixed 5.0 V version, connect this pin directly to the output capacitor (the divider midpoint applies only to the ADJ version). |
| 7 | SS | input | Soft-start pin; connect a capacitor from this pin to GND to control the output voltage ramp, or leave it floating if soft-start is not wanted. |
| 8 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO-263-7 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM2673S-5.0 - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin8 - 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files:
lm2673s-5-0-etched.step/lm2673s-5-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2673s-5-0.step/lm2673s-5-0.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (38 pp, sha256
0d2838b8538afc10, retrieved 2026-10-10, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).