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

APPLICATIONS

Automotive and Industrial Supplies 

General Purpose Step-Dow