Voltage Regulators - Switching Regulators

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LT86x Synchronous Step-Down Silent Switchers

Analog Devices LT86xx Synchronous Step-Down Regulators feature Silent Switcher^® architecture designed to minimize EMI/EMC emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a 3mm × 4mm QFN package, the monolithic construction with integrated power switches and the inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultra-low 2.5µA quiescent current enables applications requiring the highest efficiency at very small load currents. The transient response remains excellent and output voltage ripple is below 10mVP-P at any load, from zero to full current.

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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: $14.20 7,013In Stock	Mfr. Part # LT8640JUDCF#PBF Mouser Part # 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	$14.20 $13.88 $13.59 $13.31 View $13.10 $12.91 $12.71 Quote	Min.: 1 Mult.: 1 Max.: 5,610	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: $12.53 5,695In Stock	Mfr. Part # LT8640IUDCF-1#TRPBF Mouser Part # 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 $12.53 $12.26 $12.00 $11.75 View Reel $11.06 $11.57 $11.40 $11.23 $11.06 MouseReel Available	Min.: 1 Mult.: 1 Max.: 4,556 : 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: $12.38 175In Stock	Mfr. Part # LT8640EUDCF#PBF Mouser Part # 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	$12.38 $12.10 $11.84 $11.61	Min.: 1 Mult.: 1 Max.: 140	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: $19.47 84In Stock 728On Order	Mfr. Part # LT8640EUDCF-1#PBF Mouser Part # 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	$19.47 $15.25 $14.20 $13.03 View $12.90 $12.14 $11.87 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: $22.72 91In Stock	Mfr. Part # LT8640JUDCF-1#PBF Mouser Part # 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	91In Stock	$22.72 $18.01 $16.84 $15.54 View $14.81 $14.55	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 65V, 3.5A Sync Buck Silent Switcher w/ 2 LT8641EUDC#TRPBF Analog Devices 1: $19.24 2,119In Stock	Mfr. Part # LT8641EUDC#TRPBF Mouser Part # 584-LT8641EUDC#TRPBF	Analog Devices	Switching Voltage Regulators 65V, 3.5A Sync Buck Silent Switcher w/ 2 Learn More about Analog Devices adi lt86 silent switchers	Datasheet	2,119In Stock	Cut Tape $19.24 $15.20 $14.18 $13.08 View $13.07 $12.65 $12.49 $12.49 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1,799	SMD/SMT	QFN-18	Buck	810 mV to 64 V	3.5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8641	Reel, Cut Tape, MouseReel
Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 LT8640IUDCF-1#PBF Analog Devices 1: $12.53 179In Stock	Mfr. Part # LT8640IUDCF-1#PBF Mouser Part # 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	$12.53 $12.26 $12.00 $11.75	Min.: 1 Mult.: 1 Max.: 143	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 LT8640EUDC#TRPBF Analog Devices 1: $18.56 2,003In Stock	Mfr. Part # LT8640EUDC#TRPBF Mouser Part # 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	2,003In Stock	Cut Tape $18.56 $14.63 $13.64 $12.56 View $12.52 $12.10 $11.75 $11.75 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1,602	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 LT8640IUDC#PBF Analog Devices 1: $20.25 1,926In Stock	Mfr. Part # LT8640IUDC#PBF Mouser Part # 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	Datasheet	1,926In Stock	$20.25 $16.00 $13.83 $13.38 View $13.14 $12.82 $12.58	Min.: 1 Mult.: 1 Max.: 1,572	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 LT8640EUDC-1#TRPBF Analog Devices 1: $19.72 807In Stock	Mfr. Part # LT8640EUDC-1#TRPBF Mouser Part # 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	807In Stock	Cut Tape $19.72 $15.44 $14.37 $13.20 View $13.08 $12.90 $12.90 MouseReel Available	Min.: 1 Mult.: 1 Max.: 645	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: $20.25 512In Stock	Mfr. Part # LT8640IUDC-1#TRPBF Mouser Part # 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 $20.25 $16.00 $14.94 $13.77 $13.75 $13.75 MouseReel Available	Min.: 1 Mult.: 1 Max.: 409	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-1#PBF Analog Devices 1: $19.72 1,073In Stock	Mfr. Part # LT8640EUDC-1#PBF Mouser Part # 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	1,073In Stock	$19.72 $15.44 $14.38 $13.18 View $13.07 $12.30	Min.: 1 Mult.: 1 Max.: 858	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: $21.97 786In Stock 3,822On Order	Mfr. Part # LT8640HUDC#PBF Mouser Part # 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	786In Stock 3,822On Order	$21.97 $17.42 $16.28 $15.02 View $14.31 $14.07	Min.: 1 Mult.: 1 Max.: 628	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 LT8640HUDCF#PBF Analog Devices 1: $16.64 52In Stock	Mfr. Part # LT8640HUDCF#PBF Mouser Part # 584-LT8640HUDCF#PBF	Analog Devices	Switching Voltage Regulators 42V, 5A Sync Buck Silent Switcher w/ 2.5 Learn More about Analog Devices adi lt8640 regulators	Datasheet	52In Stock	$16.64 $16.28 $15.93 $15.60 View $15.37 $15.13 $14.91 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#WPBF Analog Devices 1: $23.74 113In Stock	Mfr. Part # LT8640JUDCF-1#WPBF Mouser Part # 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	113In Stock	$23.74 $18.81 $17.59	Min.: 1 Mult.: 1 Max.: 90	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, 5A Sync Buck Silent Switcher w/ 2.5 LT8640HUDC-1#PBF Analog Devices 1: $22.39 91In Stock 1,001On Order	Mfr. Part # LT8640HUDC-1#PBF Mouser Part # 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	$22.39 $17.63 $15.90 $14.94 View $14.74 $14.12 $13.94 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: $21.70 41In Stock	Mfr. Part # LT8640IUDC-1#PBF Mouser Part # 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	$21.70 $16.99 $15.81 $14.51 View $14.37 $13.52 $13.22 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: $21.81 25In Stock 1,820On Order	Mfr. Part # LT8640IUDCF#PBF Mouser Part # 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	$21.81 $17.28 $14.96 $14.47 View $14.24 $13.81 $13.51 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 65V 3.5A Silent Switcher LT8641ARUDCM#WPBF Analog Devices 1: $10.80 30In Stock	Mfr. Part # LT8641ARUDCM#WPBF Mouser Part # 584-LT8641ARUDCMWPBF	Analog Devices	Switching Voltage Regulators 65V 3.5A Silent Switcher Learn More about Analog Devices adi lt86 silent switchers	Datasheet	30In Stock	$10.80 $8.37 $7.14 $7.12 View $6.60 $6.55 $6.40 $6.08	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck		3.5 A	1 Output	1.7 uA	210 kHz to 1.95 MHz	- 40 C	+ 150 C	AEC-Q100	LT8641	Tube
Switching Voltage Regulators 65V, 3.5A Sync Buck Silent Switcher w/ 2 LT8641HUDC#PBF Analog Devices 1: $21.97 68In Stock	Mfr. Part # LT8641HUDC#PBF Mouser Part # 584-LT8641HUDC#PBF	Analog Devices	Switching Voltage Regulators 65V, 3.5A Sync Buck Silent Switcher w/ 2 Learn More about Analog Devices adi lt86 high voltage regulators	Datasheet	68In Stock	$21.97 $17.42 $16.28 $15.02 View $14.31 $14.07 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-18	Buck	810 mV to 64 V	3.5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 150 C		LT8641	Tube
Switching Voltage Regulators 65V, 3.5A Sync Buck Silent Switcher w/ 2 LT8641IUDC#PBF Analog Devices 1: $21.70 117In Stock	Mfr. Part # LT8641IUDC#PBF Mouser Part # 584-LT8641IUDC#PBF	Analog Devices	Switching Voltage Regulators 65V, 3.5A Sync Buck Silent Switcher w/ 2 Learn More about Analog Devices adi lt86 silent switchers	Datasheet	117In Stock	$21.70 $16.99 $15.81 $14.51	Min.: 1 Mult.: 1 Max.: 93	SMD/SMT	QFN-18	Buck	810 mV to 64 V	3.5 A	1 Output	2.5 uA	200 kHz to 3 MHz	- 40 C	+ 125 C		LT8641	Tube

LT86x Synchronous Step-Down Silent Switchers

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