Specification	LTC3643EUDD#PBF

Current - Output	2 A
Frequency - Switching	1 MHz
Function	Step-Down, Step-Up
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 / Case	24-WFQFN Exposed Pad
Supplier Device Package	24-QFN (3x5)
Synchronous Rectifier	True
Topology	Boost, Buck
Voltage - Input (Max) [Max]	17 V
Voltage - Input (Min) [Min]	3 V
Voltage - Output (Min/Fixed)	0.6 V

LTC3643 Series

Part	Contents	Utilized IC / Part	Type	Frequency - Switching	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Max) [Max]	Function	Voltage - Input (Min) [Min]	Output Type	Voltage - Output (Min/Fixed)	Package / Case	Mounting Type	Number of Outputs	Topology	Output Configuration	Current - Output	Supplier Device Package
Analog Devices Inc./Maxim Integrated DC2220A	Board(s)	LTC3643	Power Management
Analog Devices Inc./Maxim Integrated LTC3643IUDD#TRPBF				1 MHz	-40 C	125 °C	17 V	Step-Down Step-Up	3 V	Adjustable	0.6 V	24-WFQFN Exposed Pad	Surface Mount	1	Boost Buck	Positive	2 A	24-QFN (3x5)
Analog Devices Inc./Maxim Integrated LTC3643EUDD				1 MHz	-40 C	125 °C	17 V	Step-Down Step-Up	3 V	Adjustable	0.6 V	24-WFQFN Exposed Pad	Surface Mount	1	Boost Buck	Positive	2 A	24-QFN (3x5)
Analog Devices Inc./Maxim Integrated LTC3643IUDD#PBF				1 MHz	-40 C	125 °C	17 V	Step-Down Step-Up	3 V	Adjustable	0.6 V	24-WFQFN Exposed Pad	Surface Mount	1	Boost Buck	Positive	2 A	24-QFN (3x5)
Analog Devices Inc./Maxim Integrated LTC3643IUDD				1 MHz	-40 C	125 °C	17 V	Step-Down Step-Up	3 V	Adjustable	0.6 V	24-WFQFN Exposed Pad	Surface Mount	1	Boost Buck	Positive	2 A	24-QFN (3x5)
Analog Devices Inc./Maxim Integrated LTC3643EUDD#TRPBF				1 MHz	-40 C	125 °C	17 V	Step-Down Step-Up	3 V	Adjustable	0.6 V	24-WFQFN Exposed Pad	Surface Mount	1	Boost Buck	Positive	2 A	24-QFN (3x5)
Analog Devices Inc./Maxim Integrated LTC3643EUDD#PBF				1 MHz	-40 C	125 °C	17 V	Step-Down Step-Up	3 V	Adjustable	0.6 V	24-WFQFN Exposed Pad	Surface Mount	1	Boost Buck	Positive	2 A	24-QFN (3x5)

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	422	$ 13.20	1m+

Description

General part information

LTC3643 Series

The LTC3643 is a bidirectional synchronous step-up charger and step-down converter which efficiently charges a capacitor array up to 40V from an input supply between 3V to 17V. When the input supply falls below the programmable power-fail threshold, the step-up charger operates in reverse as a synchronous step-down regulator to power the system rail from the backup capacitor during this power interuption/failure condition.When charging the backup capacitor, an external low-value sense resistor may be used to maintain an accurate current limit from the input supply or implement PowerPath™functionality.The step-down converter operates at a 1MHz switching frequency, allowing small external components to be used. Low quiescent current during regulation maximizes the energy usage from the backup capacitor.ApplicationsBackup Capacitor SystemsPower Failure Backup SystemsSolid-State Drives

Documents

Technical documentation and resources

R539 Reliability Data

Reliability Data

LTC3643EUDD#PBF | Datasheet

Datasheet