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JY1117E18AX

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Shenzhen JingYang Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT223-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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JY1117E18AX

Shenzhen JingYang · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT223-3L

JY1117E18AX from Shenzhen JingYang, in a SOT223-3L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Adj (GND) power_in Resistor divider from this pin to VOUT and ground sets the output voltage in the adjustable version, and in the fixed-mode version (JY1117-18 is fixed 1.8V) this pin is ground only.
2 VOUT power_out Regulator output; a minimum 0.2uF X7R or X5R ceramic output capacitor is strongly recommended to prevent oscillation, and a minimum 3.3uF electrolytic capacitor (10mΩ ≤ ESR ≤ 1Ω, up to 100uF) must be connected from this pin to ground for stability.
3 VIN power_in Input pin, typically with a large storage capacitor to ground; it must always be at least 1.5V higher than VOUT for proper regulation, with an operating input range of 2.7V to 12V.

Key specifications

Parameter Value
Manufacturer Shenzhen JingYang
Package SOT223-3L
Category Power Management (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
Operation Input Voltage VIN 2.7 12 V 4
Output Voltage (JY1117-1.8) VOUT 1.764 1.8 1.836 V IOUT = 10mA 4
Line Regulation 0.2 0.5 % IOUT=10mA, VOUT+1.5V<VIN<12V, TJ=25°C (Note 1,2) 4
Load Regulation (JY1117-1.8) 15 18 mV VIN=3.3V, 0mA≤IOUT≤1A, TJ=25°C (Note 1,2) 4
Dropout Voltage (VIN-VOUT) 1.2 1.4 V IOUT = 1A, VOUT=1%VOUT 5
Current Limit 1 1.8 A (VIN-VOUT) = 1.5V 5
Minimum Load Current 5 7 mA 0°C≤Tj≤125°C 5

CAD (KiCad official)

  • Symbol: JY1117E18AX
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT223-3L (KiCad packages3D, STEP)
  • 3D model files: jy1117e18ax-etched.step / jy1117e18ax-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); jy1117e18ax.step / jy1117e18ax.glb are the bare package body.

Provenance

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

  • Datasheet: Shenzhen JingYang datasheet (13 pp, sha256 17cca7e7aa6ec0b8, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (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