• 450kHz Switching Frequency with 6% Frequency Spread Spectrum
• Up to 3.5A Continuous Output Load Current
• Fully Integrated 83mΩ (Rdson) High Side MOSFET 43mΩ (Rdson) Low Side MOSFET
• 1uA Shut-down Current
• 22uA Ultra Low Quiescent Current
• Low Dropout Mode Operation
• Peak Current Mode Control with Selectable Ineternal/External Loop Compensation
• PSM Mode in Light Load Condition
• 4ms Soft Start Time
• Output Over Voltage Protection
• Thermal Shutdown Protection at 160°C
• Available in QFN2X3-9LPackage

The SCT9331 is a 3.5A, EMI friendly synonous buck converter with up to 32V wide input voltage range 22uA ultra-low quiescent operating current. The SCT9331 fully integrates a 83mΩ high-side MOSFET a 43mΩ low-side MOSFET to provide high efficiency step-down DCDC conversion. The Pulse Skipping Modulation (PSM) 22uA ultra low quiescent current improve the power efficiency. The SCT9331 implements Frequency Spread Spectrum (FSS) with ±6% jittering span of the 450 KHz switching frequency modulation rate 1/512 of switching frequency to reduce Electromagnetic Interference (EMI).  It adopts peak current mode control with the able internal integrated compensation or external compensation. The internal compensation network makes SCT9331 easy to be used by minimizing the off-chip component count. The SCT9331 features output overvoltage protection, cycle-by-cycle peak current limit, thermal shutdown protection. The device is available in a QFN2X3-9L package.

Application：

• White Goods, Home Applicance, Surveillance
• Audio, Wifi Speaker, Printer
• DTV, STB, Monitor
• Automotive

Parameter list

Technical information