FEATURES
n Silent Switcher ®2 Architecture
n Ultralow EMI Emissions on Any PCB
n Eliminates PCB Layout Sensitivity
n Internal Bypass Capacitors Reduce Radiated EMI
n Optional Spread Spectrum Modulation
n High Efficiency at High Frequency
n Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT
n Up to 95% Efficiency at 2MHz, 12VIN to 5VOUT
n Wide Input Voltage Range: 3.4V to 42V
n Output Voltage Range: 0.97V to 10V(LT8640S/LT8643S);
0.97V to (VIN – 0.5V) (LT8640SA/LT8643SA)
n 6A Maximum Continuous, 7A Peak Output
n Ultralow Quiescent Current Burst Mode® Operation
n 2.5μA IQ Regulating 12VIN to 3.3VOUT
(LT8640S/LT8640SA)
n Output Ripple < 10mVP-P
n External Compensation: Fast Transient Response and
Current Sharing (LT8643S/LT8643SA)
n Robust High VOUT Operation (LT8640SA/LT8643SA)
n Safely Tolerates High Reverse Current
n Fast Minimum Switch On-Time: 30ns
n Low Dropout Under All Conditions: 100mV at 1A
n Forced Continuous Mode
n Adjustable and Synchronizable: 200kHz to 3MHz
n Output Soft-Start and Tracking
n Small 24-Lead 4mm × 4mm LQFN Package
n AEC-Q100 Qualified for Automotive Applications

APPLICATIONS
n Automotive and Industrial Supplies