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LDI1117-3.3H

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by Ray

DIOTEC LDI1117 3 3H Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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LDI1117-3.3H

DIOTEC LDI1117 3 3H · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

LDI1117-3.3H from DIOTEC LDI1117 3 3H, in a SOT-223. 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 / common return. On fixed-voltage LDI1117 variants (including -3.3H) pin 1 is the GND reference; on the adjustable ADH variant this same pin is the ADJ feedback input.
2 VOUT power_out Regulated 3.3 V output. Typical output tolerance ±1.0% (3.267-3.333 V at 10 mA), up to 1 A load. Requires at least a 22 µF output capacitor for stability.
3 VIN power_in Unregulated input supply. Recommended operating range up to 15 V, absolute maximum 20 V. Requires at least a 10 µF input capacitor. Must exceed VOUT by ≥1.15 V at 1 A for regulation.
4 VOUT power_out Regulated 3.3 V output on the SOT-223 heat-sink tab. Electrically identical to pin 2; provides thermal dissipation to the PCB copper pad.

Key specifications

Parameter Value
Manufacturer DIOTEC LDI1117 3 3H
Package SOT-223
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • LDI1117-3.3H
  • LDI1117-3.3M

CAD (KiCad official)

  • Symbol: LDI1117-3.3H
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: DIOTEC LDI1117 3 3H datasheet (11 pp, sha256 20c2d2bc0dad8962, 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