Analog Devices Inc.

42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5A Quiescent Current Features: Silent Switcher ®2 Architecture Ultralow EMI Emissions on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation High Efficiency at High Frequency Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT Up to 95% Efficiency at 2MHz, 12VIN to 5VOUT Wide Input Voltage Range: 3.4V to 42V 6A Maximum Continuous, 7A Peak Output Ultralow Quiescent Current Burst Mode® Operation 2.5μA IQ Regulating 12VIN to 3.3VOUT (LT8640S) Output Ripple < 10mVP-P External Compensation: Fast Transient Response and Current Sharing (LT8643S) Fast Minimum Switch On-Time: 30ns Low Dropout Under All Conditions: 100mV at 1A Forced Continuous Mode Adjustable and Synchronizable: 200kHz to 3MHz Output Soft-Start and Tracking Small 24-Lead 4mm × 4mm LQFN Package AEC-Q100 Qualified for Automotive Applications

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