component

LM2679S-3.3

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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lm2679s-3-3-etched.glb lm2679s-3-3: factory component page (tier=lcsc) · Ray 13h ago
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LM2679S-3.3

Texas Instruments · DC-DC Converters · TO-263-7

LM2679S-3.3 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 input Supply input pin to the collector of the high-side FET; connect to the power supply and input bypass capacitor CIN, keeping the path from VIN to CIN and GND as short as possible.
3 CB input Bootstrap 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, with the ground pins of CIN and COUT and the path to CIN kept 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; connect to the midpoint of the feedback divider to set VOUT for the adjustable version, or connect directly to the output capacitor for a fixed-output version such as the 3.3-V LM2679S-3.3.
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 the feature 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: LM2679S-3.3
  • Footprint: Package_TO_SOT_SMD:TO-263-7_TabPin8
  • 3D model: TO-263-7 (KiCad packages3D, STEP)
  • 3D model files: lm2679s-3-3-etched.step / lm2679s-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2679s-3-3.step / lm2679s-3-3.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (38 pp, sha256 e875ecde9bd514b4, retrieved 2026-10-08, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF