component

U6119SA

Public Unreviewed

by Ray

UNI SEMIC DC-DC Converters, SOP-7. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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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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Contents

README

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U6119SA

UNI SEMIC · DC-DC Converters · SOP-7

U6119SA from UNI SEMIC, in a SOP-7. 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 VDD power_in Chip power supply. UVLO thresholds ~16.3V on / ~9V off; VDD OVP clamp at 30V; absolute max 26V. Typical standby current 15µA.
2 GND/VCP power_in On U6119SA/SC this pin is GND/VCP (ground / compensation return). On the U6119S variant this pin is NC. Bond per the SA/SC pin configuration diagram.
3 FB input Voltage feedback input. Internal 2V reference (VFB_REF ≈ 2.0V) with 2% accuracy; drives the error amplifier for PSR-CVM constant-voltage regulation and connects to sample-and-hold / cable-drop compensation blocks.
4 CS input Current sense input from external sense resistor. Peak current-limit threshold Vcs(max) ≈ 0.5V; feeds cycle-by-cycle current limiter and PSR-CCM constant-current modulator, with 200ns leading-edge blanking (LEB).
5 VIN output High-voltage switching output drain of the internal power MOSFET (paralleled with pin 6). U6119SA breakdown 100V, switch current rating 3/5A. Connects to the inductor / transformer primary.
6 VIN output High-voltage switching output drain of the internal power MOSFET (paralleled with pin 5). Tie both VIN pins together at the PCB to share switch current.
8 GND power_in Device ground / source return of the internal power MOSFET. SOP-7 uses pin positions 1-6 and 8 (pin 7 is absent).

Key specifications

Parameter Value
Manufacturer UNI SEMIC
Package SOP-7
Category PMIC
Pins 7

Ordering variants

Same part, different packaging or reel option.

  • U6119SA
  • U6119SC

CAD (KiCad official)

  • Symbol: U6119SA
  • Footprint: Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm
  • 3D model: SOP-7 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
u6119sa.step 111 KB You want the bare part, or you mark your own boards.
u6119sa-etched.step 1.7 MB You want the part with U6119SA already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 408 faces against 132 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: UNI SEMIC datasheet (11 pp, sha256 6ea7ae2f975caef7, retrieved 2026-08-17, tier: lcsc)
  • 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).

Datasheet PDF