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HT7550-1

Public Unreviewed

by Ray

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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HT7550-1

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

HT7550-1 from UMW, in a SOT-89. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground reference for the regulator. Connect to system ground; also serves as the return for the internal reference and control loop.
2 VIN power_in Unregulated input supply, up to 30V absolute maximum. Bypass with a 10µF capacitor to GND close to the pin (per application circuit).
3 VOUT power_out Regulated 5.0V output (±3%), up to 100mA. Requires a 10µF output capacitor to GND for stability (per application circuit).

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-89
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • HT7550-1SOT-89
  • HT7550-1TO-92
  • HT7550-1TO 92
  • HT7550-1SOT23-3
  • HT7550-1SOT-23
  • HT7550-1SOT23-5
  • HT7550-1SOT-23-5

CAD (KiCad official)

  • Symbol: HT7550-1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ht7550-1.step 57 KB You want the bare part, or you mark your own boards.
ht7550-1-etched.step 979 KB You want the part with HT7550-1 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 277 faces against 42 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 (15 pp, sha256 8a1946363b661b62, 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