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HT7550S

Public Unreviewed

by Ray

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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HT7550S

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

HT7550S from UMW, in a SOT-23. 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 Device ground reference. Connect to the system ground plane and to the negative terminal of the input and output bypass capacitors.
2 VIN power_in Unregulated input supply. Absolute maximum 30V. Bypass with a 10µF capacitor to GND close to the pin (see application circuit).
3 VOUT power_out Regulated 5.0V ±3% output (4.85V-5.15V typ at VIN=7V, IOUT=10mA). Continuous output current 60-100mA. Bypass with a 10µF capacitor to GND for stability.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-23
Category PMIC
Pins 3

CAD (KiCad official)

  • Symbol: HT7550S
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ht7550s.step 59 KB You want the bare part, or you mark your own boards.
ht7550s-etched.step 1.3 MB You want the part with HT7550S already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 324 faces against 69 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 c8d27849b87576cd, 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