U3504E

U3504E is a high-voltage step-down switching regulator with integrated MOSFET. It integrates a high-side high-voltage power MOSFET with a typical current limit of 10A (IPK). Its wide input voltage range suits multiple buck application scenarios, making it an ideal choice for automotive, industrial, and lighting applications. The device employs hysteretic voltage mode control for ultra-fast transient response. UNIU's proprietary feedback control scheme minimizes the number of required external components. The switching frequency of 150KHz contributes to compact component size. Thermal shutdown and short-circuit protection provide reliable, fault-tolerant operation. The low quiescent current characteristic enables U3504E for use in battery-powered applications. The device is available in an ESOP-8 package with exposed pad.

Applications

• Electric scooter and e-bike control power supplies
• Solar energy systems
• Automotive power systems
• Industrial power supplies
• High-power LED drivers
• USB devices

Key features

• Integrated high-voltage startup circuit
• Default 5V output
• Integrated 150V/98mΩ MOSFET
• Integrated bootstrap diode
• Hysteretic control: no compensation required
• 150KHz switching frequency
• PWM dimming control input for buck applications
• Short-circuit protection for high-side MOSFET
• Low quiescent current
• Thermal shutdown protection
• ESOP-8 package with exposed pad