Specification	LT3641EUFD#TRPBF

Current - Output	1.1 A, 1.3 A
Frequency - Switching [Max]	2 MHz
Frequency - Switching [Min]	500 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	28-WFQFN Exposed Pad
Supplier Device Package	28-QFN (4x5)
Topology	Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	2.5 V
Voltage - Output (Min/Fixed)	1.265 V, 0.6 V

LT3641 Series

Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer

Part	Number of Outputs	Voltage - Output (Min/Fixed)	Package / Case	Current - Output	Output Configuration	Supplier Device Package	Voltage - Input (Max) [Max]	Function	Topology	Output Type	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Input (Min) [Min]	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]
Analog Devices Inc./Maxim Integrated LT3641EUFD#TRPBF	2	0.6 V 1.265 V	28-WFQFN Exposed Pad	1.1 A 1.3 A	Positive	28-QFN (4x5)	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3641EFE#PBF	2	0.6 V 1.265 V	28-TSSOP (0.173" 4.40mm Width) Exposed Pad	1.1 A 1.3 A	Positive	28-TSSOP-EP	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3641HFE#PBF	2	0.6 V 1.265 V	28-TSSOP (0.173" 4.40mm Width) Exposed Pad	1.1 A 1.3 A	Positive	28-TSSOP-EP	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 °C	150 °C
Analog Devices Inc./Maxim Integrated LT3641HFE#TRPBF	2	0.6 V 1.265 V	28-TSSOP (0.173" 4.40mm Width) Exposed Pad	1.1 A 1.3 A	Positive	28-TSSOP-EP	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 °C	150 °C
Analog Devices Inc./Maxim Integrated LT3641EFE#TRPBF	2	0.6 V 1.265 V	28-TSSOP (0.173" 4.40mm Width) Exposed Pad	1.1 A 1.3 A	Positive	28-TSSOP-EP	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3641IFE#TRPBF	2	0.6 V 1.265 V	28-TSSOP (0.173" 4.40mm Width) Exposed Pad	1.1 A 1.3 A	Positive	28-TSSOP-EP	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3641EUFD#PBF	2	0.6 V 1.265 V	28-WFQFN Exposed Pad	1.1 A 1.3 A	Positive	28-QFN (4x5)	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3641IUFD#PBF	2	0.6 V 1.265 V	28-WFQFN Exposed Pad	1.1 A 1.3 A	Positive	28-QFN (4x5)	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3641IUFD#TRPBF	2	0.6 V 1.265 V	28-WFQFN Exposed Pad	1.1 A 1.3 A	Positive	28-QFN (4x5)	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C
Analog Devices Inc./Maxim Integrated LT3641IFE#PBF	2	0.6 V 1.265 V	28-TSSOP (0.173" 4.40mm Width) Exposed Pad	1.1 A 1.3 A	Positive	28-TSSOP-EP	42 V	Step-Down	Buck	Adjustable	2 MHz	500 kHz	2.5 V	Surface Mount	-40 C	125 °C

Pricing

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

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 5.46	1m+

Description

General part information

LT3641 Series

The LT3641 is a dual channel, current mode monolithic buck switching regulator with a power-on reset and a watchdog timer. Both regulators are synchronized to a single oscillator with an adjustable frequency (350kHz to 2.5MHz). At light loads, both regulators operate in low ripple Burst Mode®to maintain high effi ciency and low output ripple.The high voltage channel is a nonsynchronous buck with an internal 2.4A top switch that operates from an input of 4V to 42V and input transient protection to 55V. The low voltage channel operates from an input of 2.5V to 5.5V. Internal synchronous power switches provide high effi ciency without the need of external Schottky diode. Both channels have cycle-by-cycle current limit, providing protection against shorted outputs.The power-on reset and watchdog timeout periods are both adjustable using external capacitors. The window mode watchdog timer fl ags when the μP pulses group too close together or too far apart.The LT3641 is available in a 28-pin 4mm × 5mm QFN package and 28-pin TSSOP package. Both packages have an exposed pad for low thermal resistance.ApplicationsIndustrial Power SuppliesAutomotive Electronic Control Units

Documents

Technical documentation and resources

R526 Reliability Data

Reliability Data

LT3641EUFD#TRPBF | Datasheet

Datasheet