Voltage Regulators - Switching Regulators

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LT8640/LT8640-1 Step-Down Regulators

Analog Devices Inc. LT8640/LT8640-1 Step-Down Regulators feature Silent Switcher architecture designed to minimize EMI/EMC emissions while delivering high efficiency at frequencies up to 3MHz. An ultralow 2.5µA quiescent current—with the output in full regulation—enables applications requiring the highest efficiency at very small load currents. The LT8640/LT8640-1 allows high V_IN to low V_OUT conversion at high frequency with a fast minimum top switch on-time of 30ns. The SYNC/MODE pin selects between Burst Mode operation, spread spectrum mode, synchronization to an external clock, and either pulse-skipping (LT8640) or forced continuous mode (LT8640-1).

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Topology	Output Voltage	Output Current	Number of Outputs	Quiescent Current	Switching Frequency	Minimum Operating Temperature	Maximum Operating Temperature	Qualification	Series	Packaging
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640JUDCF#PBF Analog Devices 1: $10.92 7,013In Stock	Mfr. Part No. LT8640JUDCF#PBF Mouser Part No 584-LT8640JUDCF#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	7,013In Stock	$10.92 $10.68 $10.45 $10.24 View $10.08 $9.93 $9.78 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640IUDCF-1#TRPBF Analog Devices 1: $9.64 5,695In Stock	Mfr. Part No. LT8640IUDCF-1#TRPBF Mouser Part No 584-8640IUDCF-1TRPBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	5,695In Stock	Cut Tape $9.64 $9.43 $9.23 $9.04 View Reel $8.51 $8.90 $8.77 $8.64 $8.51 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-18	Buck	970 mV to 41.58 V	5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640EUDCF#PBF Analog Devices 1: $9.52 175In Stock	Mfr. Part No. LT8640EUDCF#PBF Mouser Part No 584-LT8640EUDCF#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	175In Stock	$9.52 $9.31 $9.11 $8.93 View $8.79 $8.66 $8.53 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	1.7 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640EUDCF-1#PBF Analog Devices 1: $14.98 84In Stock 728On Order	Mfr. Part No. LT8640EUDCF-1#PBF Mouser Part No 584-LT8640EUDCF1PB	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	84In Stock 728On Order	$14.98 $11.73 $10.92 $10.02 View $9.92 $9.34 $9.13 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	1.7 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640JUDCF-1#PBF Analog Devices 1: $17.48 66In Stock	Mfr. Part No. LT8640JUDCF-1#PBF Mouser Part No 584-LT8640JUDCF-1PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	66In Stock	$17.48 $13.85 $12.95 $11.95 View $11.39 $11.19	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640IUDCF-1#PBF Analog Devices 1: $9.64 179In Stock	Mfr. Part No. LT8640IUDCF-1#PBF Mouser Part No 584-8640IUDCF-1#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	179In Stock	$9.64 $9.43 $9.23 $9.04 View $8.90 $8.77 $8.64 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.58 V	5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640IUDC#PBF Analog Devices Restricted Availability	Mfr. Part No. LT8640IUDC#PBF Mouser Part No 584-LT8640IUDC#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt86 silent switchers Mouser does not presently sell this product in your region.	Datasheet			Restricted Availability	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	1.7 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 6A Sync Buck Silent Switcher 2 w/ 2 LT8640SEV-2#PBF Analog Devices 1: $16.69 3,050In Stock	Mfr. Part No. LT8640SEV-2#PBF Mouser Part No 584-LT8640SEV-2#PBF	Analog Devices	Switching Voltage Regulators 42V, 6A Sync Buck Silent Switcher 2 w/ 2 Learn More about Analog Devices adi lt8640 regulators	Datasheet	3,050In Stock	$16.69 $13.20 $12.33 $11.37 View $10.91 $10.62	Min.: 1 Mult.: 1	SMD/SMT	LQFN-24	Buck	970 mV to 41.58 V	6 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640S	Tray
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640EUDC-1#TRPBF Analog Devices 1: $15.17 632In Stock	Mfr. Part No. LT8640EUDC-1#TRPBF Mouser Part No 584-8640EUDC-1TRPBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	632In Stock	Cut Tape $15.17 $11.88 $11.05 $10.15 View $10.06 $9.92 $8.53 MouseReel Available	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.58 V	5 A	1 Output	1.7 uA, 2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640IUDC-1#TRPBF Analog Devices 1: $15.58 512In Stock	Mfr. Part No. LT8640IUDC-1#TRPBF Mouser Part No 584-8640IUDC-1TRPBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	512In Stock	Cut Tape $15.58 $12.31 $11.49 $10.59 View $10.58 $10.25 $10.12 $9.35 MouseReel Available	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.58 V	5 A	1 Output	1.7 uA, 2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640EUDC#TRPBF Analog Devices 1: $14.28 868In Stock	Mfr. Part No. LT8640EUDC#TRPBF Mouser Part No 584-LT8640EUDC#TRPBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	868In Stock	Cut Tape $14.28 $11.25 $10.49 $9.66 View $9.63 $9.31 $9.04 $8.78 Quote MouseReel Available	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.58 V	5 A	1 Output	2.5 uA, 300 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640EUDC-1#PBF Analog Devices 1: $15.17 367In Stock	Mfr. Part No. LT8640EUDC-1#PBF Mouser Part No 584-LT8640EUDC-1#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt86 silent switchers	Datasheet	367In Stock	$15.17 $11.88 $11.06 $10.14 View $10.05 $9.46 $9.24 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	1.7 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640HUDC#PBF Analog Devices 1: $16.90 286In Stock 3,822On Order	Mfr. Part No. LT8640HUDC#PBF Mouser Part No 584-LT8640HUDC#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt86 silent switchers	Datasheet	286In Stock 3,822On Order	$16.90 $13.40 $12.52 $11.55 View $11.01 $10.82 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	1.7 uA	200 kHz to 3 MHz	- 40 C	+ 150 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640JUDCF-1#WPBF Analog Devices 1: $18.26 69In Stock	Mfr. Part No. LT8640JUDCF-1#WPBF Mouser Part No 584-LT8640JUDCF1WPBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	69In Stock	$18.26 $14.47 $13.53 $12.48 View $11.90 $11.69 $11.68	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C	AEC-Q100	LT8640	Tube
Switching Voltage Regulators 42V, 6A Sync Buck Silent Switcher 2 w/ 2 LT8640SIV-2#PBF Analog Devices 1: $16.96 1,083In Stock	Mfr. Part No. LT8640SIV-2#PBF Mouser Part No 584-LT8640SIV-2#PBF	Analog Devices	Switching Voltage Regulators 42V, 6A Sync Buck Silent Switcher 2 w/ 2 Learn More about Analog Devices adi lt8640 regulators	Datasheet	1,083In Stock	$16.96 $13.44 $12.56 $11.59 View $11.06 $10.86	Min.: 1 Mult.: 1	SMD/SMT	LQFN-24	Buck	970 mV to 41.58 V	6 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640S	Tray
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640HUDC-1#PBF Analog Devices 1: $17.22 91In Stock 1,001On Order	Mfr. Part No. LT8640HUDC-1#PBF Mouser Part No 584-LT8640HUDC-1#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	91In Stock 1,001On Order	$17.22 $13.56 $12.23 $11.49 View $11.34 $10.86 $10.72 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.58 V	5 A	1 Output	300 uA	200 kHz to 3 MHz	- 40 C	+ 150 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640IUDC-1#PBF Analog Devices 1: $16.69 41In Stock	Mfr. Part No. LT8640IUDC-1#PBF Mouser Part No 584-LT8640IUDC-1#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt86 silent switchers	Datasheet	41In Stock	$16.69 $13.07 $12.16 $11.16 View $11.05 $10.40 $10.17 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	1.7 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640IUDCF#PBF Analog Devices 1: $16.78 25In Stock 1,820On Order	Mfr. Part No. LT8640IUDCF#PBF Mouser Part No 584-LT8640IUDCF#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	25In Stock 1,820On Order	$16.78 $13.29 $11.51 $11.13 View $10.95 $10.62 $10.39 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	970 mV to 41.9 V	5 A	1 Output	1.7 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8640	Tube

LT8640/LT8640-1 Step-Down Regulators

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LT8640/LT8640-1 Step-Down Regulators

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