Description

65V, 8A 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 95% Efficiency at 1MHz, 12VIN to 5VOUT Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT Wide Input Voltage Range: 3.4V to 65V Ultralow Quiescent Current Burst Mode Operation 2.5μA IQ Regulating 12VIN to 3.3VOUT (LT8645S) Output Ripple < 10mVP-P External Compensation: Fast Transient Response and Current Sharing (LT8646S) Fast Minimum Switch On-Time: 40ns Low Dropout Under All Conditions: 60mV at 1A Adjustable and Synchronizable: 200kHz to 2.2MHz Peak Current Mode Operation Output Soft-Start and Tracking Small 32-Lead 6mm × 4mm LQFN Package AEC-Q100 Qualified for Automotive Applications