LT8640LT8640-1 Series

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

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

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

Part	Mounting Type	Package / Case	Function	Qualification	Grade	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Number of Outputs	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Output (Max) [Max]	Voltage - Output (Min/Fixed) [Min]	Supplier Device Package	Current - Output	Output Configuration
Analog Devices Inc./Maxim Integrated LT8640JUDCF-1#WPBF	Surface Mount Wettable Flank	20-WFQFN 18 Leads Exposed Pad	Step-Down	AEC-Q100	Automotive	Adjustable	-40 °C	150 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640JUDCF-1#PBF	Surface Mount Wettable Flank	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 °C	150 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640HUDCF#PBF	Surface Mount Wettable Flank	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 °C	150 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640HUDC#PBF	Surface Mount	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 °C	150 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640HUDC-1#TRPBF	Surface Mount	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 °C	150 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640JUDCF#PBF	Surface Mount Wettable Flank	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 C	125 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640JUDCF#WPBF	Surface Mount Wettable Flank	20-WFQFN 18 Leads Exposed Pad	Step-Down	AEC-Q100	Automotive	Adjustable	-40 °C	150 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640EUDCF-1#PBF	Surface Mount Wettable Flank	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 C	125 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640EUDC#PBF	Surface Mount	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 C	125 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive
Analog Devices Inc./Maxim Integrated LT8640HUDCF#TRPBF	Surface Mount Wettable Flank	20-WFQFN 18 Leads Exposed Pad	Step-Down			Adjustable	-40 °C	150 °C	Buck	3.4 V	42 V	1	2 MHz	210 kHz	42 V	0.97 V	20-QFN (3x4)	5 A	Positive

Description

The LT8640/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/LT8640-1 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 either pulse-skipping (LT8640) or forced continuous mode (LT8640-1).PackageSYNC/MODE ≠ 0VCCOMPH-GRADECLKOUTINTERNAL CAPSLT8640QFNPulse-SkippingInternalYesNoNoLT8640-1QFNFCMInternalYesNoNoLT8640SLQFNFCMInternalNoYesYesLT8643SLQFNFCMExternalNoYesYesLT8640S-2LQFNFCMInternalYesYesNoLT8643S-2LQFNFCMExternalYesYesNoApplicationsAutomotive and Industrial SuppliesGeneral Purpose Step-DownGSM Power Supplies