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JY1117E25AX

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Shenzhen JingYang 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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JY1117E25AX

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

JY1117E25AX from Shenzhen JingYang, in a SOT-223-4. 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 GND power_in Ground reference for the fixed-output version (shown as Adj (GND) on the drawing; Adj pin on the adjustable version, ground only for fixed-mode).
2 VOUT power_out Regulator output (2.5V fixed for the 25 option); needs a minimum 0.2uF X7R/X5R ceramic or 3.3uF to 100uF electrolytic (10mΩ ≤ ESR ≤ 1Ω) to ground for stability.
3 VIN power_in Regulator input, must always be 1.5V higher than VOUT for proper regulation, operating input range 2.7V to 12V, with a storage capacitor to ground.
4 VOUT power_out Exposed tab, connected internally to VOUT per the pin drawing ("Tab is Vout").

Key specifications

Parameter Value
Manufacturer Shenzhen JingYang
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
Operation Input Voltage 2.7 12 V 5
Reference Voltage 1.225 1.25 1.275 V IOUT = 10mA, TJ=25°C, (VIN-OUT)=1.5V 5
Output Voltage (-2.5) 2.45 2.5 2.55 V IOUT = 10mA, TJ = 25°C, 4V<=VIN<=12V 5
Line Regulation 0.2 0.5 % IOUT=10mA, VOUT+1.5V < VIN<12V, TJ=25°C (Note 1,2) 5
Load Regulation (-2.5) 20 25 mV VIN=4V, 10mA<=IOUT<=1A, TJ=25°C (Note 1,2) 5
Dropout Voltage (VIN-VOUT) 1.2 1.4 V IOUT = 1A, ΔVOUT=1%VOUT 6
Current Limit 1 A (VIN-VOUT) = 1.5V 6
Minimum Load Current 5 7 mA 0°C<=Tj<=125°C 6
Ripple Rejection 50 60 70 dB F=120Hz, COUT=10μF, 0.2μF, (VIN-VOUT) = 1.5V 6
Temperature Stability 0.5 % IOUT=10mA 6
Thermal Shutdown Temperature 145 °C Over temperature protect 6
Thermal Shutdown Hysteresis 40 °C 6
Lead Temperature 260 °C 6
Thermal Resistance Junction-to-Ambient, SOT-223 (with heat sink) TJA 75 °C/W Note 4: tab connected to 5mm*5mm PCB copper area 6
Thermal Resistance Junction-to-Ambient, SOT-223 (no heat sink, no air flow) TJA 117 °C/W No heat sink; no air flow 6
Thermal Resistance Junction-to-Case, SOT-223 TJC 15 °C/W 6
DC Supply Voltage VIN -0.3 15 V 4
Operating Junction Temperature Range Top -40 125 °C 4
Maximum Junction Temperature TMJ 150 °C 4
Power Dissipation, SOT-223 (heat sink) PD 1300 mW Heat sink area 5mm*5mm; TA=25°C, TJ=125°C 4
Power Dissipation, SOT-223 (no heat sink, no air flow) PD 850 mW No heat sink; no air flow; TA=25°C, TJ=125°C 4
Storage Temperature TST -65 150 °C 4

CAD (KiCad official)

  • Symbol: JY1117E25AX
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: jy1117e25ax-etched.step / jy1117e25ax-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); jy1117e25ax.step / jy1117e25ax.glb are the bare package body.

Provenance

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

  • Datasheet: Shenzhen JingYang datasheet (14 pp, sha256 ce7d13785e792583, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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