Integrated Circuits (ICs)

LT8643SEV-2#TRPBF

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42V, 6A SYNCHRONOUS STEP-DOWN SILENT SWITCHER WITH 2.5ΜA QUIESCENT CURRENT WITH EXTERNAL COMPENSATION

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DocumentsLT8640S-2/LT8643S-2: 42V, 6A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current Data Sheet (Rev.D)

Integrated Circuits (ICs)

LT8643SEV-2#TRPBF

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Analog Devices Inc./Maxim Integrated

42V, 6A SYNCHRONOUS STEP-DOWN SILENT SWITCHER WITH 2.5ΜA QUIESCENT CURRENT WITH EXTERNAL COMPENSATION

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DocumentsLT8640S-2/LT8643S-2: 42V, 6A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current Data Sheet (Rev.D)

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT8643SEV-2#TRPBF

Current - Output	6 A
Frequency - Switching [Max]	3 MHz
Frequency - Switching [Min]	200 kHz
Function	Step-Down
Grade	Automotive
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-TFQFN Exposed Pad
Qualification	AEC-Q100
Supplier Device Package	24-LQFN
Supplier Device Package [x]	4
Supplier Device Package [y]	4
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	3 V
Voltage - Output (Max) [Max]	42 V
Voltage - Output (Min/Fixed) [Min]	0.97 V

LT8643S-2 Series

42V, 6A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current with External Compensation

Part	Voltage - Input (Min) [Min]	Function	Number of Outputs	Frequency - Switching [Max]	Frequency - Switching [Min]	Current - Output	Mounting Type	Package / Case	Topology	Voltage - Output (Min/Fixed) [Min]	Output Configuration	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package [x]	Supplier Device Package [y]	Supplier Device Package	Voltage - Input (Max) [Max]	Output Type	Voltage - Output (Max) [Max]	Qualification	Grade
Analog Devices Inc./Maxim Integrated LT8643SIV-2#PBF	3.4 V	Step-Down	1	2.1 MHz	180 kHz	6 A	Surface Mount	24-TFQFN Exposed Pad	Buck	0.97 V	Positive	125 °C	-40 C	4	4	24-LQFN	42 V	Adjustable	42 V
Analog Devices Inc./Maxim Integrated LT8643SEV-2#TRPBF	3 V	Step-Down	1	3 MHz	200 kHz	6 A	Surface Mount	24-TFQFN Exposed Pad	Buck	0.97 V	Positive	125 °C	-40 C	4	4	24-LQFN	42 V	Adjustable	42 V	AEC-Q100	Automotive
Analog Devices Inc./Maxim Integrated LT8643SIV-2#TRPBF	3 V	Step-Down	1	3 MHz	200 kHz	6 A	Surface Mount	24-TFQFN Exposed Pad	Buck	0.97 V	Positive	125 °C	-40 C	4	4	24-LQFN	42 V	Adjustable	42 V	AEC-Q100	Automotive
Analog Devices Inc./Maxim Integrated LT8643SHV-2#TRPBF	3 V	Step-Down	1	3 MHz	200 kHz	6 A	Surface Mount	24-TFQFN Exposed Pad	Buck	0.97 V	Positive	150 °C	-40 °C	4	4	24-LQFN	42 V	Adjustable	42 V	AEC-Q100	Automotive
Analog Devices Inc./Maxim Integrated LT8643SEV-2#PBF	3.4 V	Step-Down	1	2.1 MHz	180 kHz	6 A	Surface Mount	24-TFQFN Exposed Pad	Buck	0.97 V	Positive	125 °C	-40 C	4	4	24-LQFN	42 V	Adjustable	42 V
Analog Devices Inc./Maxim Integrated LT8643SHV-2#PBF	3.4 V	Step-Down	1	2.1 MHz	180 kHz	6 A	Surface Mount	24-TFQFN Exposed Pad	Buck	0.97 V	Positive	150 °C	-40 C	4	4	24-LQFN	42 V	Adjustable	42 V

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	$ 6.85	1m+
	Tape & Reel (TR)	2500	$ 6.85	1m+

Description

General part information

LT8643S-2 Series

The LT8640S-2/LT8643S-2 synchronous step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. Peak current mode control with a 30ns minimum on-time allows high step-down ratios even at high switching frequencies. The LT8643S-2 has external compensation to enable current sharing and fast transient response at high switching frequencies.Burst Mode operation enables ultralow standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emissions.APPLICATIONSAutomotive and Industrial SuppliesGeneral Purpose Step-Down

Documents

Technical documentation and resources

LT8640S-2/LT8643S-2: 42V, 6A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current Data Sheet (Rev.D)

Data Sheet