component

RT9742SNGV

Public Made by Adom

by adom

Richtek Tech Power Distribution Switches, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RT9742SNGV

Richtek Tech · Power Distribution Switches · SOT-23-3

RT9742SNGV from Richtek Tech, in a SOT-23-3. 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 VIN power_in Power input voltage and MOSFET drain, operating range 2.7V to 6V (7V absolute maximum), with a 10µF low-ESR ceramic capacitor to GND placed close to the pin recommended.
2 VOUT power_out Switch output (MOSFET source) that delivers load current from VIN, with current limit at 0.7A typical for the RT9742S and a 0.1µF output capacitor to GND recommended.
3 GND power_in Ground.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package SOT-23-3
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 Quiescent Current IQ 30 40 µA Switch on, VOUT = open 5
Input Shutdown Current ISHDN 0.1 1 µA VIN = 5V, no load on OUT, device OFF, VEN = 0V or VEN = 5V 5
Switch On Resistance (RT9742XXJ5/V variant, applies to SNGV) RDS(ON) 70 mΩ RT9742XXJ5/V 5
Over Current Trip Threshold (RT9742Q/R/S, 0.5A class) ITRIP 0.65 0.89 1 A VIN = 5V, 100A/s 5
Current Limit (RT9742Q/R/S, 0.5A class) ILIM 0.6 0.7 0.8 A VOUT = 1V 6
EN/EN Threshold Logic_High Voltage VIH 1.5 V VIN = 2.7V to 6V 6
EN/EN Threshold Logic_Low Voltage VIL 0.75 V VIN = 2.7V to 6V 6
EN/EN Input Current IEN/EN 0.5 0.5 µA VEN = 0V, VEN = 5V 6
Output Leakage Current ILEAKAGE 0.5 1 µA VEN = 0V, RLOAD = 0 6
Reverse Leakage Current IREV 1 µA VOUT = 5V, VIN = 0V 6
FLG Off Current IFLG_OFF 0.01 1 µA VFLG = 5V 6
Under-Voltage Lockout (VIN rising) VUVLO 2.4 V VIN rising 6
Supply Input Voltage VIN (recommended) VIN 2.7 6 V 5
EN Voltage (recommended) VEN 0 6 V 5
Junction Temperature Range (recommended) TJ -40 125 °C 5
Ambient Temperature Range (recommended) TA -40 85 °C 5
Supply Input Voltage VIN (absolute maximum) VIN 7 V 5
EN Voltage (absolute maximum) VEN -0.3 7 V 5
FLAG Voltage (absolute maximum) VFLAG 7 V 5
Power Dissipation, SOT-23-3 PD 0.41 W TA = 25°C 5
Junction Temperature (absolute maximum) TJ 150 °C 5
Lead Temperature (Soldering) 260 °C 10 sec. 5
Storage Temperature Range -65 150 °C 5
ESD Susceptibility HBM 2 kV Human Body Model 5
Package Thermal Resistance, SOT-23-3 θJA 243.3 °C/W JEDEC 51-7 four-layer test board 5

CAD (KiCad official)

  • Symbol: RT9742SNGV
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: rt9742sngv-etched.step / rt9742sngv-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt9742sngv.step / rt9742sngv.glb are the bare package body.

Provenance

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

  • Datasheet: Richtek Tech datasheet (19 pp, sha256 4512463eff0aa45d, retrieved 2026-11-03, 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