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