LT8640IUDC-1#TRPBF

LT8640-1 step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz. An ultralow 2.5µA quiescent current with the output in full regulation enables applications requiring highest efficiency at very small load currents. The LT8640-1 allows high VIN to low VOUT conversion at high frequency with a fast minimum top switch on-time of 30ns. The SYNC/MODE pin selects between Burst Mode operation, spread spectrum mode, synchronization to an external clock, and forced continuous mode (LT8640-1).

• Up to 96% efficiency at 1MHz, 12VIN to 5VOUT
• Up to 95% efficiency at 2MHz, 12VIN to 5VOUT
• Wide input voltage range from 3.4V to 42V
• 5A maximum continuous output, 7A peak transient output
• Ultralow quiescent current Burst Mode® operation
• Low dropout under all conditions is 100mV at 1A, 18-lead plastic QFN package
• Safely tolerates inductor saturation in overload
• Adjustable and synchronizable: 200KHz to 3MHz
• Peak current mode operation
• Output soft-start and tracking

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party