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RS7550-1YE3L

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Jiangsu RUNIC Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RS7550-1YE3L

Jiangsu RUNIC Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L

RS7550-1YE3L from Jiangsu RUNIC Tech, in a SOT-89-3L. 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 GND power_in Ground reference pin; the datasheet says the GND pin must be connected to the ground plane for proper dissipation.
2 VIN power_in Regulator input accepting up to 36V, with at least a 1μF supply bypass capacitor recommended.
3 VOUT power_out Regulator output with a recommended output capacitor range of 1μF to 10μF.

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package SOT-89-3L
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
Input Voltage VIN 36 V VOUT = 5.0V, +25°C 6
Output Voltage Accuracy -2 0 2 % IOUT = 10mA, +25°C 6
Ground Pin Current 2 3 μA No load, VIN = VOUT + 2V, +25°C 6
Maximum Output Current 100 150 mA +25°C 6
Dropout Voltage VDROP 440 700 mV IOUT = 100mA, △Vo=2%, +25°C 6
Line Regulation ΔVOUT ΔVIN × VOUT 0.05 0.2 %/V VIN = VOUT + 2V to 36V, IOUT = 1mA, +25°C 6
Load Regulation ΔVOUT 25 60 mV VIN = VOUT + 2V, IOUT = 1mA to 150mA, +25°C 6
Output Voltage Temperature Coefficient ΔVOUT ΔTA × VOUT 100 ppm/°C IOUT = 1mA, Full = -40°C to +85°C 6
Thermal Shutdown Temperature TSHDN 150 °C 6
Input voltage (absolute maximum) VIN -0.3 40 V All voltages with respect to GND 4
Junction temperature TJ -40 150 °C 4
Storage temperature Tstg -65 150 °C 4
Electrostatic discharge, Human-body model (HBM) V(ESD) -4000 4000 V Human-body model (HBM) 4
Electrostatic discharge, Machine model (MM) V(ESD) -100 100 V Machine model (MM) 4
Input supply voltage VIN 2.5 36 V 4
Output current IOUT 0 150 mA 4
Capacitor of Vout pin COUT 1 22 μF 4
Operating temperature TA -40 85 °C Free-air; TA limited by junction temperature (see note 2) 4
Junction-to-ambient thermal resistance (SOT89-3L L-Type) RθJA 165 °C/W SOT89-3L (L-Type) column 4
Junction-to-case (top) thermal resistance (SOT89-3L L-Type) RθJC(top) 88.5 °C/W SOT89-3L (L-Type) column 4
Junction-to-board thermal resistance (SOT89-3L L-Type) RθJB 39.6 °C/W SOT89-3L (L-Type) column 4
Junction-to-top characterization parameter (SOT89-3L L-Type) ψJT 26.5 °C/W SOT89-3L (L-Type) column 4
Junction-to-board characterization parameter (SOT89-3L L-Type) ψJB 49.7 °C/W SOT89-3L (L-Type) column 4
Junction-to-case (bottom) thermal resistance (SOT89-3L L-Type) RJC(bot) 77.7 °C/W SOT89-3L (L-Type) column 4

CAD (KiCad official)

  • Symbol: RS7550-1YE3L
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: rs7550-1ye3l-etched.step / rs7550-1ye3l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rs7550-1ye3l.step / rs7550-1ye3l.glb are the bare package body.

Provenance

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

  • Datasheet: Jiangsu RUNIC Tech datasheet (11 pp, sha256 818bd81e05d2139f, retrieved 2026-10-18, 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