LT8640A Series

42V, 5A/8A Peak Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

42V, 5A/8A Peak Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current

Part	Topology	Function	Frequency - Switching [Min]	Frequency - Switching [Max]	Package / Case	Voltage - Input (Max) [Max]	Voltage - Output (Max) [Max]	Output Configuration	Mounting Type	Output Type	Supplier Device Package	Synchronous Rectifier	Voltage - Input (Min) [Min]	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Current - Output	Voltage - Output (Min/Fixed) [Min]
Analog Devices Inc./Maxim Integrated LT8640AJUDCM#PBF	Buck	Step-Down	200 kHz	3 MHz	20-WFQFN Exposed Pad 18 Leads	42 V	41.58 V	Positive	Surface Mount Wettable Flank	Adjustable	20-QFN (3x4)		2.9 V	1	-40 °C	150 °C	5 A	0.97 V

Catalog

42V, 5A/8A Peak Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current

Description

The LT8640A 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 LT8640A allows high VINto low VOUTconversion 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.ApplicationsAutomotive and Industrial SuppliesGeneral Purpose Step-Down