LT8641EUDC#PBF

Active

Analog Devices Inc./Maxim Integrated

65V, 3.5A SYNCHRONOUS STEP-DOWN SILENT SWITCHER WITH 2.5ΜA QUIESCENT CURRENT

Find alt

Alpha

LT8641EUDC#PBF

Active

Analog Devices Inc./Maxim Integrated

65V, 3.5A SYNCHRONOUS STEP-DOWN SILENT SWITCHER WITH 2.5ΜA QUIESCENT CURRENT

Find alt

Alpha

Description Specifications Series Pricing CAD Documents

Description

General part information

LT8641 Series

The LT8641 step-down regulator features Silent Switcher architecture designed to minimize EMI/EMC emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a 3mm × 4mm QFN, the monolithic construction with integrated power switches and inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultralow 2.5μA quiescent current—with the output in full regulation—enables applications requiring highest efficiency at very small load currents. Transient response remains excellent and output voltage ripple is below 10mVP-Pat any load, from zero to full current.The LT8641 allows high VINto low VOUTconversion at high frequency with a fast minimum top switch on-time of 35ns. Operation is safe in overload even with a saturated inductor.Essential features are included and easy to use: An open-drain PG pin signals when the output is in regulation. The SYNC/MODE pin selects between Burst Mode, pulse-skipping, or spread spectrum mode, and also allows synchronization to an external clock. Soft-start and tracking functionality is accessed via the TR/SS pin. An accurate enable threshold can be set using the EN/UV pin and a resistor at the RT pin programs switch frequency.APPLICATIONSAutomotive and Industrial SuppliesGeneral Purpose Step-DownGSM Power Supplies

Technical Specifications

Parameters and characteristics for this part

Specification	LT8641EUDC#PBF

Current - Output	3.5 A
Frequency - Switching (Max)	2 MHz
Frequency - Switching (Min)	210 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package Leads	18 Leads
Package Length	3 mm
Package Name	20-WFQFN, 20-QFN
Package Width	4 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	65 V
Voltage - Input (Min)	3 V
Voltage - Output (Max)	64.35 V
Voltage - Output (Min/Fixed)	0.8 V

LT8641 Series

Part	Voltage - Input (Max)	Number of Outputs	Voltage - Output (Max)	Topology	Output Configuration	Voltage - Output (Min/Fixed)	Mounting Type	Frequency - Switching (Max)	Frequency - Switching (Min)	Operating Temperature (Min)	Operating Temperature (Max)	Package Length	Package Name	Package Width	Current - Output	Package Leads	Voltage - Input (Min)	Function	Synchronous Rectifier	Output Type	Board Type	Supplied Contents	Total Output Count	Non-Isolated Output Count	Utilized IC / Part	Contents	Regulator Topology	Main Purpose	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Voltage - Output	Frequency - Switching
Analog Devices Inc./Maxim Integrated LT8641HUDC#TRPBF	65 V	1	64.35 V	Buck	Positive	0.8 V	Surface Mount	2 MHz	210 kHz	-40 °C	150 °C	3 mm	20-QFN 20-WFQFN	4 mm	3.5 A	18 Leads	3 V	Step-Down	Yes	Adjustable
Analog Devices Inc./Maxim Integrated LT8641EUDC#TRPBF	65 V	1	64.35 V	Buck	Positive	0.8 V	Surface Mount	2 MHz	210 kHz	-40 °C	125 °C	3 mm	20-QFN 20-WFQFN	4 mm	3.5 A	18 Leads	3 V	Step-Down	Yes	Adjustable
Analog Devices Inc./Maxim Integrated LT8641EUDC#PBF	65 V	1	64.35 V	Buck	Positive	0.8 V	Surface Mount	2 MHz	210 kHz	-40 °C	125 °C	3 mm	20-QFN 20-WFQFN	4 mm	3.5 A	18 Leads	3 V	Step-Down	Yes	Adjustable
Analog Devices Inc./Maxim Integrated LT8641HUDC#PBF	65 V	1	64.35 V	Buck	Positive	0.8 V	Surface Mount	2 MHz	210 kHz	-40 °C	150 °C	3 mm	20-QFN 20-WFQFN	4 mm	3.5 A	18 Leads	3 V	Step-Down	Yes	Adjustable
Analog Devices Inc./Maxim Integrated EVAL-LT8641A-AZ															3.5 A					Non-Isolated	Fully Populated	Board(s)	1	1 count	LT8641A	Board	Buck	DC/DC Step Down	5.5 V	65 V	5 VDC	2 MHz
Analog Devices Inc./Maxim Integrated LT8641IUDC#TRPBF	65 V	1	64.35 V	Buck	Positive	0.8 V	Surface Mount	2 MHz	210 kHz	-40 °C	125 °C	3 mm	20-QFN 20-WFQFN	4 mm	3.5 A	18 Leads	3 V	Step-Down	Yes	Adjustable
Analog Devices Inc./Maxim Integrated LT8641IUDC#PBF	65 V	1	64.35 V	Buck	Positive	0.8 V	Surface Mount	2 MHz	210 kHz	-40 °C	125 °C	3 mm	20-QFN 20-WFQFN	4 mm	3.5 A	18 Leads	3 V	Step-Down	Yes	Adjustable

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Create a free account to access distributor pricing data.

CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT8641: 65V, 3.5A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current Data Sheet (Rev.C)

R570 Reliability Data