3A wide-input synchronous buck IC with auto PWM/PFM and multi-protections for computers, communication, industrial and smart home devices

RT8290ZSP is a synchronous buck DC-DC converter developed by Richtek, featuring an input voltage range of 4.5V to 24V and maximum continuous output current of 3A. Designed for computers, communication equipment, industrial systems, and smart home devices.

• High-Efficiency Voltage Conversion: Integrates high-side and low-side MOSFETs with low turn-on resistance using constant on-time control architecture. Provides rapid transient response, low output ripple, and minimal peripheral components for stable point-of-load power supply.
• Automatic PWM/PFM Mode Switching: Operates in PFM mode under light load for enhanced efficiency, and switches to PWM mode under heavy load for stable low output voltage ripple.
• Internal Soft-Start Circuit: Effectively suppresses inrush current during power-on, prevents input bus voltage drop, and supports sequential power-on requirements for multiple power rails.
• Comprehensive Protection Features: Integrated UVLO undervoltage lockout, cycle-by-cycle current limiting, and thermal shutdown protection to safeguard the chip and connected loads from undervoltage, overcurrent, and overheating damage.
• Standard SMD Packaging: SOP-8 lead-free packaging compliant with RoHS standards, optimized for PCB layout in various electronic equipment.

• Computer Equipment: Notebook and desktop motherboard auxiliary power, hard disk and graphics card power supply
• Network Communication Products: Routers, switches, wireless modules, and network cameras
• Industrial Control Equipment: Embedded mainboards, small automation controllers, and industrial sensors
• Consumer Electronics: Monitors, set-top boxes, and smart home devices
• Portable Embedded Instruments: Handheld detection and control terminals