SCT9323.pdf• EMI Reduction with Switching Node Ringing-free
• 3.8V-32V Wide Input Voltage Range
• Up to 2A Continuous Output Load Current
• 3.3V ±1% Output Voltage
• Fully Integrated 130mΩ Rdson High-side MOSFET and
70mΩ Rdson Low-side MOSFET
• 1uA Shut-down Current
• 20uA Ultra Low Quiescent Current
• 500KHz Switching Frequency with ±6% Frequency
Spread Spectrum FSS Modulation
• 80ns Minimum On-time
• Precision Enable Threshold for Programmable UVLO
Threshold and Hysteresis
• Low Drop-Out LDO Operation
• Pulse Skipping Modulation PSM in Light Load
• 4ms Built-in Soft-start Time
• Fixed 3.3-V Output
• 4.5-V to 28-V Wide Input Voltage Range
• Up to 1.7-A Maximum Continuous Output Loading Current
• Pulse Skipping Mode to Achieve High Light Load Efficiency
• Over 80% Efficiency at 10-mA Loading
• Adjustable 50-kHz to 1.1-MHz Switching Frequency Set by
an External Resistor (Leave pin ROSC floating. Set
frequency to 120 kHz and ground connection to 70 kHz)
• Peak Current-Mode Control
• Cycle-by-Cycle Over Current Protection
• Frequency Spread Spectrum and Switching Node
Anti-Ringing to Ease EMI Issue
• External Soft Start
• Available in SOIC8 Package
