UP1707S Synchronous Buck Converter IC

The UP1707S IC is a high-efficiency synchronous step-down (buck) converter designed to reduce higher input voltages to stable lower output levels for electronic systems. It is commonly used in laptop DC-in power circuits, portable media devices, smartphones, and automotive or industrial electronics, where reliable and efficient voltage conversion is essential.

Optimized for battery-powered and adapter-powered designs, the UP1707S supports smooth power delivery while minimizing energy loss. It is frequently serviced during repairs related to DC-in failure, unstable system voltage, or overheating power sections.

• High-efficiency synchronous buck (step-down) converter

• Designed for DC-in and system power applications

• Supports output current up to 3A

• Suitable for battery-powered and adapter-powered devices

• Integrated protection: overcurrent and thermal shutdown

• Stable operation under varying load conditions

• Works with external inductor and passive components