RT9742SNGV

RT9742SNGV is a Richtek (Richtek Technology) synchronous buck regulator IC. It’s a high-efficiency, step-down DC-DC converter that integrates two MOSFETs (high-side and low-side) and a current‑mode PWM controller to regulate a lower output rail from a higher input voltage. Key features typically include adjustable output via external feedback resistors, fixed switching frequency, enable control, soft-start, and protections such as overcurrent and thermal shutdown. The “SNGV” suffix denotes a specific package variant and pinout used in compact surface-mount designs.
Common uses are voltage rails for processors, memory, and other digital ICs in portable and embedded systems, where a compact, power-efficient regulator is needed from a battery or adapter.
How to use (high level): connect VIN and GND, enable with EN, set VOUT with the feedback network (VOUT = VFB × (1+R1/R2)), place appropriate input/output capacitors and an inductor as per datasheet recommendations, and follow layout guidelines for stability and noise. For exact specs and pinout, consult the RT9742SNGV datasheet.

QFN-16 package (4×4 mm) with exposed pad.

Pin count: 8 pins. Function: A single-channel step-down DC-DC buck converter (high-efficiency switching regulator) in the 8-pin SNGV package.

Manufacturer: Richtek Technology Corporation (Richtek).
Richtek is a Taiwan-based fabless semiconductor company that designs and markets power-management ICs (analogue and mixed-signal ICs) used in consumer electronics and other devices. Manufacturing is outsourced to foundries.

RT9742SNGV is a power-management IC. Common application areas include:
- Portable devices (smartphones, tablets, wearables)
- DC-DC conversion and general system power management
- Battery charging for Li‑ion packs
- LED backlighting/driver applications
- Automotive infotainment and sensors
- IoT and networking equipment
- Docking/charging peripherals
Efficient power management in compact electronics.