• Wide Input Range: 3.5V-36V

• Up to 4A Continuous Output Current

• 1V ±1.5% Feedback Reference Voltage

• Integrated 30mΩ High-Side and 18mΩ Low-Side Power MOSFETs

• 13uA Quiescent Current with VBIAS Connected to an auxiliary power supply to 5V

• 60ns Minimum On-time

• 4ms Internal Soft-start Time

• Adjustable Frequency 200KHz to 1.8MHz

• External Clock Synchronization

• Frequency Spread Spectrum (FSS) Modulation for EMI Reduction

• External bias option for improved efficiency

• Parallel input path to minimize switch node ringing

• Low Dropout Mode Operation

• Over-voltage and Over-Temperature Protection

• Available in 3.5mm*4mm QFN-14L Package

The SCT2444 is 4A synchronous buck converters with wide input voltage, ranging from 3.5V to 36V, which integrates a 30mΩ high-side MOSFET and a 18mΩ low-side MOSFET. The SCT2444, adopting the peak current mode control, supports the Pulse Skipping Modulation (PSM) with typical 13uA (VBIAS=5V) low quiescent current which assists the converter on achieving high efficiency at light load or standby condition. The SCT2444 features adjustable switching frequency from 200 kHz to 1.8 MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The converter supports external clock synchronization with a frequency band from 200kHz to 1.8MHz. The SCT2444 allows power conversion from high input voltage to low output voltage with a minimum 60ns on-time of highside MOSFET. The SCT2444 is an Electromagnetic Interference (EMI) friendly buck converter with implementing optimized design for EMI reduction. The SCT2444 features

Frequency Spread Spectrum FSS with ±6% jittering span of the 500kHz switching frequency and modulation rate 1/512 of switching frequency to reduce the conducted EMI. The SCT2444 offers cycle-by-cycle current limit and hiccup over current protection, thermal shutdown protection, output over-voltage protection and input voltage under-voltage protection. The device is available in 3.5mm*4mm FCQFN-14L package.

• USB Type-C Power Delivery, USB Charging

• Industrial Automation

• Industrial and Medical Distributed Power Supplies

• Automotive aftermarket applications