LT8640JUDCF-1#WPBF

Active

Analog Devices Inc./Maxim Integrated

42V, 5A SYNCHRONOUS STEP-DOWN SILENT SWITCHER WITH 2.5ΜA QUIESCENT CURRENT

LT8640JUDCF-1#WPBF

Active

Analog Devices Inc./Maxim Integrated

42V, 5A SYNCHRONOUS STEP-DOWN SILENT SWITCHER WITH 2.5ΜA QUIESCENT CURRENT

Description Specifications Series Pricing CAD Documents

Description

General part information

LT8640LT8640-1 Series

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

Technical Specifications

Parameters and characteristics for this part

Specification	LT8640JUDCF-1#WPBF

Current - Output	5 A
Frequency - Switching (Max)	2 MHz
Frequency - Switching (Min)	210 kHz
Function	Step-Down
Grade	Automotive
Mounting Type	Wettable Flank, Surface Mount
Number of Outputs	1
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package Leads	18 Leads
Package Length	3 mm
Package Name	20-QFN, 20-WFQFN
Package Width	4 mm
Qualification	AEC-Q100
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	42 V
Voltage - Input (Min)	3.4 V
Voltage - Output (Max)	42 V
Voltage - Output (Min/Fixed)	0.97 V

LT8640LT8640-1 Series

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

Part	Output Configuration	Current - Output	Package Length	Package Name	Package Width	Voltage - Output (Min/Fixed)	Voltage - Output (Max)	Frequency - Switching (Max)	Frequency - Switching (Min)	Number of Outputs	Voltage - Input (Max)	Voltage - Input (Min)	Topology	Operating Temperature (Min)	Operating Temperature (Max)	Output Type	Grade	Qualification	Function	Package Leads	Synchronous Rectifier	Mounting Type
Analog Devices Inc./Maxim Integrated LT8640JUDCF-1#WPBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	150 °C	Adjustable	Automotive	AEC-Q100	Step-Down	18 Leads	Yes	Surface Mount Wettable Flank
Analog Devices Inc./Maxim Integrated LT8640JUDCF-1#PBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	150 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount Wettable Flank
Analog Devices Inc./Maxim Integrated LT8640HUDCF#PBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	150 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount Wettable Flank
Analog Devices Inc./Maxim Integrated LT8640HUDC#PBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	150 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated LT8640HUDC-1#TRPBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	150 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated LT8640JUDCF#PBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	125 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount Wettable Flank
Analog Devices Inc./Maxim Integrated LT8640JUDCF#WPBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	150 °C	Adjustable	Automotive	AEC-Q100	Step-Down	18 Leads	Yes	Surface Mount Wettable Flank
Analog Devices Inc./Maxim Integrated LT8640EUDCF-1#PBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	125 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount Wettable Flank
Analog Devices Inc./Maxim Integrated LT8640EUDC#PBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	125 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated LT8640HUDCF#TRPBF	Positive	5 A	3 mm	20-QFN 20-WFQFN	4 mm	0.97 V	42 V	2 MHz	210 kHz	1	42 V	3.4 V	Buck	-40 °C	150 °C	Adjustable			Step-Down	18 Leads	Yes	Surface Mount Wettable Flank

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT8640/LT8640-1: 42V, 5A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current Data Sheet (Rev.G)

R570 Reliability Data

Package Drawing - 20(18)-Lead Plastic Side Wettable QFN (3mm × 4mm)

LT8640JUDCF-1#WPBF | Datasheet