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HT7833-A

Public Made by Adom

by adom

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs ht7833-a: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
ht7833-a-etched.fit.json ht7833-a: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ht7833-a-etched.glb ht7833-a: one-pass backfill (re-etched) · Ray
ht7833-a-etched.step ht7833-a: one-pass backfill (re-etched) · Ray
ht7833-a.glb Publish 0.1.0 · Ray
ht7833-a.kicad_mod Publish 0.1.0 · Ray
ht7833-a.kicad_sym Publish 0.1.0 · Ray
ht7833-a.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
ht7833-a.step Publish 0.1.0 · Ray
package.json Publish 0.2.1 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json Publish 0.2.1 · Ray
README.md ht7833-a: specified limits as data (metadata.characteristics, 13 rows from the datasheet) · Ray

HT7833-A

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

HT7833-A from UMW, in a SOT-89. 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 GND power_in Ground reference for both the input supply and the regulated output. All voltages in the datasheet are referenced to this pin.
2 VIN power_in Unregulated supply input. Absolute max 15V (recommended operating max 12V). A small input decoupling capacitor is recommended close to this pin for stability.
3 VOUT power_out Regulated 3.3V (±3%) output. Delivers up to 450mA with ~90mV dropout at 40mA. Requires an output capacitor for loop stability.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage VOUT 3.201 3.3 3.399 V VIN=4.3V, IOUT=40mA 5
Output Current IOUT 45 450 mA VIN=4.3V, IOUT≥2.97V 5
Load Regulation ΔVOUT 90 mV VIN=4.3V, 1mA≤IOUT≤60mA 5
Drop Voltage VDIF 90 mV IOUT=40mA 5
Quiescent Current ISS 2 3 µA VIN=4.3V, No Load 5
Line Regulation ΔVOUT/(ΔVIN*VOUT) 0.2 0.3 %/V 4.3V≤VIN≤12V, IOUT=40mA 5
Input Voltage VIN 12 V 5
Temperature Coefficient ΔVOUT/ΔTA -0.7 0.7 mV/°C VIN=4.3V,IOUT=40mA,0°C≤TA≤85°C 5
Supply Voltage Range VIN -0.5 15 V 3
Consumption Power PD 400 mW 3
Junction Temperature TJ -50 125 °C 3
Operating Temperature TOP -40 85 °C 3
Welding Temperature Th 260 °C 10s 3

CAD (KiCad official)

  • Symbol: HT7833-A
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: ht7833-a-etched.step / ht7833-a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht7833-a.step / ht7833-a.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ht7833-a.step 57 KB You want the bare part, or you mark your own boards.
ht7833-a-etched.step 1.1 MB You want the part with HT7833-A already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 300 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 (12 pp, sha256 0ddd2116b6d87a09, 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