LT8643SHV-2#PBF

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Analog Devices

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)Datasheet

LT8643SHV-2#PBF

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Analog Devices

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

Deep-Dive with AI

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

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT8643SHV-2#PBF

Current - Output	6 A
Frequency - Switching [Max]	2.1 MHz
Frequency - Switching [Min]	180 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Output Configuration	Positive
Output Type	Adjustable
Package / Case	24-TFQFN Exposed Pad
Supplier Device Package	24-LQFN (4x4)
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	3.4 V
Voltage - Output (Max) [Max]	42 V
Voltage - Output (Min/Fixed) [Min]	0.97 V

LT8643S/LT8643SA Series

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

Part	Supplier Device Package	Voltage - Input (Min) [Min]	Voltage - Output (Max) [Max]	Grade	Package / Case	Frequency - Switching [Min]	Frequency - Switching [Max]	Current - Output	Mounting Type	Voltage - Input (Max) [Max]	Output Configuration	Number of Outputs	Function	Output Type	Qualification	Topology	Voltage - Output (Min/Fixed) [Min]	Operating Temperature [Min]	Operating Temperature [Max]
Analog Devices LT8643SEV-2#TRPBF	24-LQFN (4x4)	3 V	42 V	Automotive	24-TFQFN Exposed Pad	200 kHz	3 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable	AEC-Q100	Buck	0.97 V	-40 °C	125 ¯C
Analog Devices LT8643SIV#PBF	24-LQFN (4x4)	3.4 V	42 V		24-TFQFN Exposed Pad	200 kHz	3 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable		Buck	0.97 V	-40 °C	125 ¯C
Analog Devices LT8643SIV#TRPBF	24-LQFN (4x4)	3 V	42 V	Automotive	24-TFQFN Exposed Pad	200 kHz	3 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable	AEC-Q100	Buck	0.97 V	-40 °C	125 ¯C
Analog Devices LT8643SIV-2#TRPBF	24-LQFN (4x4)	3 V	42 V	Automotive	24-TFQFN Exposed Pad	200 kHz	3 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable	AEC-Q100	Buck	0.97 V	-40 °C	125 ¯C
Analog Devices LT8643SEV#TRPBF	24-LQFN (4x4)	3 V	42 V	Automotive	24-TFQFN Exposed Pad	200 kHz	3 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable	AEC-Q100	Buck	0.97 V	-40 °C	125 ¯C
Analog Devices LT8643SIV#WPBF	24-LQFN (4x4)	3 V	42 V	Automotive	24-TFQFN Exposed Pad	200 kHz	3 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable	AEC-Q100	Buck	0.97 V	-40 °C	125 ¯C
Analog Devices LT8643SHV-2#TRPBF	24-LQFN (4x4)	3 V	42 V	Automotive	24-TFQFN Exposed Pad	200 kHz	3 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable	AEC-Q100	Buck	0.97 V	-40 °C	150 °C
Analog Devices LT8643SEV-2#PBF	24-LQFN (4x4)	3.4 V	42 V		24-TFQFN Exposed Pad	180 kHz	2.1 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable		Buck	0.97 V	-40 °C	125 °C
Analog Devices LT8643SHV-2#PBF	24-LQFN (4x4)	3.4 V	42 V		24-TFQFN Exposed Pad	180 kHz	2.1 MHz	6 A	Surface Mount	42 V	Positive	1	Step-Down	Adjustable		Buck	0.97 V

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tray	1	$ 16.03
		10	$ 11.48
		25	$ 10.31
		80	$ 9.19
		230	$ 8.43
		440	$ 8.06
		945	$ 7.90

Description

General part information

LT8643S/LT8643SA Series

TheLT®8640S/LT8643S/LT8640SA/LT8643SA synchronous step-down regulator features second generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes the integration of bypass capacitors to optimize all the fast current loops inside and make it easy to achieve advertised EMI performance by reducing layout sensitivity. This performance makes the LT8640S/LT8643S/LT8640SA/LT8643SA ideal for noise-sensitive applications and environments.Peak current mode control with a 30ns minimum on-time allows high step-down ratios even at high switching frequencies. The LT8643S/LT8643SA 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 spreadspectrum operation can further reduce EMI emissions.ApplicationsAutomotive and Industrial Supplies

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