component

LD1117ADT12TR

Public Unreviewed

by Ray

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

componentpmicld1117adt12tr
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

LD1117ADT12TR

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DPAK

LD1117ADT12TR from STMicroelectronics, in a DPAK. 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 ADJ/GND power_in Ground pin for fixed-voltage versions (LD1117ADT12 fixed 1.2 V). Shared with adjust pin function on the adjustable variant; on this fixed 1.2 V part it is connected to system ground (0 V).
2 VOUT power_out Regulated 1.2 V output (tolerance +/-2% at 25 C, +/-4% over full temperature range). Delivers up to 1 A. Requires a 10 uF minimum output capacitor for stability. The DPAK exposed tab is internally connected to this pin.
3 VIN power_in Unregulated DC input voltage, up to 15 V absolute max, 10 V recommended operating. Must be at least ~1.15 V above VOUT (dropout at 1 A) for regulation. A 100 nF input capacitor is recommended per the application circuit.
4 TAB power_out Exposed thermal pad on the DPAK package, internally connected to VOUT. Should be soldered to a copper pour tied to the VOUT net for heat sinking (Rth(j-c) = 8 C/W, Rth(j-a) = 100 C/W for DPAK).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package DPAK
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • LD1117ADT12TR
  • LD1117ADT18TR
  • LD1117ADT33TR
  • LD1117ADT-TR
  • LD1117AS12TR
  • LD1117AS18TR
  • LD1117AS33TR
  • LD1117ASTR
  • LD1117AV33

CAD (KiCad official)

  • Symbol: LD1117ADT12TR
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: DPAK (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: STMicroelectronics datasheet (24 pp, sha256 c2dd41daa75f2827, retrieved 2026-08-17, tier: manufacturer)
  • 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