FEATURES
DESCRIPTION
n Silent Switcher® Architecture n Ultralow EMI Emissions n Spread Spectrum Frequency 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 5A Maximum Continuous Output, 7A Peak Transient Output n Ultralow Quiescent Current Burst Mode® Operation n 2.5µA IQ Regulating 12VIN to 3.3VOUT n Output Ripple < 10mVP-P n Fast Minimum Switch On-Time: 30ns n Low Dropout Under All Conditions: 100mV at 1A n Forced Continuous Mode (LT8640-1 Only) n Safely Tolerates Inductor Saturation in Overload n Adjustable and Synchronizable: 200kHz to 3MHz n Peak Current Mode Operation n Output Soft-Start and Tracking n Small 18-Lead 3mm × 4mm QFN and Side Wettable QFN n AEC-Q100 Qualified for Automotive APPLICATIONS
APPLICATIONS
n Automotive and Industrial Supplies n General Purpose Step-Down n GSM Power Supplies The LT®8640/LT8640-1 step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz.
Linear Technology
