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LM2575HVS-3.3

Public Unreviewed

by Ray

UMW DC-DC Converters, TO-263-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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README

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LM2575HVS-3.3

UMW · DC-DC Converters · TO-263-5

LM2575HVS-3.3 from UMW, in a TO-263-5. 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 VIN power_in Input supply voltage. Accepts unregulated DC from 4.75V up to 60V for the HV variant (absolute max 63V). Bypass locally with a low-ESR bulk capacitor (typ. 680 μF for the 3.3V circuit).
2 Output output Switching output of the internal 2A power switch. Connects to the external catch diode (e.g. 1N5824 Schottky) and buck inductor (typ. 33 μH) that filter it into the regulated 3.3V rail. Rated 2A continuous with internal current limit; can swing to -1V during freewheel.
3 GND power_in Device ground. Common return for input, output and control circuitry. Also the primary thermal path through the tab of the TO-263 package.
4 Feedback input Output-voltage sense input for the internal error amplifier. On the fixed 3.3V version this pin ties directly to the regulated output node so the internal divider regulates VOUT to 3.3V (±4% over line and load).
5 ON/OFF input TTL-compatible shutdown control. Active low or floating enables the regulator; driving high (up to VIN, absolute max +VIN) forces the device into low-power standby mode (IQ typ. 50 μA). Do not exceed VIN on this pin.

Key specifications

Parameter Value
Manufacturer UMW
Package TO-263-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LM2575HVS-3.3
  • LM2575S-3.3
  • LM2575HVT-3.3
  • LM2575T-3.3

The extractor listed these alongside LM2575HVS-3.3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LM2575HVS-5.0
  • LM2575S-5.0
  • LM2575HVS-12
  • LM2575S-12
  • LM2575HVS-ADJ
  • LM2575S-ADJ
  • LM2575HVT-5.0
  • LM2575T-5.0
  • LM2575HVT-12
  • LM2575T-12
  • LM2575HVT-ADJ
  • LM2575T-ADJ

CAD (KiCad official)

  • Symbol: LM2575HVS-3.3
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm2575hvs-3-3.step 180 KB You want the bare part, or you mark your own boards.
lm2575hvs-3-3-etched.step 2.1 MB You want the part with LM2575HVS-3.3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 568 faces against 135 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: UMW datasheet (30 pp, sha256 b0c31af439f0b6b9, 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