• 3V to 9V Input Voltage Range 
• 6A (Min.) Main MOSFET Current Limit
• 7 µA Shutdown Current (Max.)
• 600 µA Quiescent Current (Typ.)
• Programmable Output Current Limit
• Low RDS(ON) for Internal N-Channel MOSFET: 80mΩ Main, 40mΩ Rectifier, 40mΩ Disconnection
• Synchronous Rectification for High Efficiency
• Pseudoconstant 1MHz Frequency
• Enable Control
• Input Voltage UVLO
• Output Overvoltage Protection
• Overtemperature Protection
• Output Short-Circuit Protection
• Power-Good Indicator
• True Shutdown Function
• RoHS-Compliant and Halogen-Free
• Compact QFN3mm×3mm-16 Package

The SY21282 high efficiency synchronous step-up regulator operates using adaptive constant off-time and current mode control, and supports a wide input voltage range from 3V to 9V. It integrates switches with low RDS(ON) to minimize conduction loss.

The SY21282 features cycle-by-cycle peak current limit, output short-circuit protection, and true shutdown. It also provides enable control and power-good indicator for system power sequencing. The 1MHz pseudo-constant frequency reduces the output voltage ripple and permits smaller external capacitors and inductor.

The SY21282 is available in a compact QFN3×3- 16 package.