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LDL1117S12R

Public Made by Adom

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STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against 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
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docs ldl1117s12r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 25d ago
viewers ldl1117s12r: viewers · Ray 1mo ago
ldl1117s12r-etched.fit.json ldl1117s12r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ldl1117s12r-etched.glb ldl1117s12r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 25d ago
ldl1117s12r-etched.step ldl1117s12r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 25d ago
ldl1117s12r.glb Publish 0.1.0 · Ray 1mo ago
ldl1117s12r.kicad_mod Publish 0.1.0 · Ray 1mo ago
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ldl1117s12r.step Publish 0.1.0 · Ray 1mo ago
package.json ldl1117s12r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 25d ago
page.json ldl1117s12r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 25d ago
README.md ldl1117s12r: specified limits as data (metadata.characteristics, 21 rows from the datasheet) · Ray 25d ago

LDL1117S12R

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

LDL1117S12R from STMicroelectronics, in a SOT-223-4. 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 connection.
2 VOUT power_out Regulated output voltage of 1.185 V at up to 1.2 A maximum current.
3 VIN power_in Input voltage supply ranging from 2.5 V to 18 V.
4 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-223-4
Category Power Management (PMIC)
Pins 4

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 accuracy (TJ = 25 °C) VOUT -2 2 % IOUT = 10 mA, TJ = 25 °C 6
Output voltage accuracy (-40 °C to 125 °C) VOUT -3 3 % IOUT = 10 mA, -40 °C < TJ < 125 °C 6
Operating input voltage VIN 2.6 18 V 6
UVLO turn-on threshold VUVLO 2.3 2.4 V 6
UVLO hysteresis VUVLO 200 mV 6
Line regulation ΔVOUT 0.002 0.02 %/V VOUT + 1 V (1) ≤ VIN ≤ 18 V, IOUT = 10 mA, -40 °C < TJ < 125 °C 6
Load regulation ΔVOUT 5 15 mV IOUT = 10 mA to 1.2 A, -40 °C < TJ < 125 °C 6
Supply voltage rejection (120 Hz) SVR 87 dB VIN = VOUT(NOM) + 1 V ± VRIPPLE, VRIPPLE = 0.5 V, f = 120 Hz 6
Supply voltage rejection (1 kHz) SVR 80 dB VIN = VOUT(NOM) + 1 V ± VRIPPLE, VRIPPLE = 0.5 V, f = 1 kHz 6
Supply voltage rejection (100 kHz) SVR 65 dB VIN = VOUT(NOM) + 1 V ± VRIPPLE, VRIPPLE = 0.5 V, f = 100 kHz 6
Quiescent current IQ 250 500 µA IOUT = 0 mA to 1.2 A, -40 °C < TJ < 125 °C 6
Output current (short-circuit / current limit) ISC 1.5 2 A 6
Thermal shutdown TSHDN 175 °C 6
Thermal shutdown hysteresis TSHDN 25 °C Hysteresis 6
Input supply voltage (absolute maximum) VIN -0.3 20 V 5
Output voltage (absolute maximum) VOUT -0.3 V Upper limit printed as VIN + 0.3 V 5
Operating junction temperature TJ-OP -40 125 °C 5
Maximum junction temperature TJ-MAX 150 °C 5
Storage temperature TSTG -55 150 °C 5
Thermal resistance junction-to-case θJ-C 15 °C/W 5
Thermal resistance junction-to-ambient θJ-A 120 °C/W 5

CAD (KiCad official)

  • Symbol: LDL1117S12R
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: ldl1117s12r-etched.step / ldl1117s12r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ldl1117s12r.step / ldl1117s12r.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (23 pp, sha256 ffbb9e03f7f6d0c4, retrieved 2026-09-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF