LT8611 Buck Converter overview

Description

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Category
Sub-Category

LT8611 is a 42.00 V sync Buck Converter from with 2.50 A output current. The maximum 42.00 V input voltage can be regulated down into a 0.97 V to 40.00 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 10 and achieves a peak efficiency of 96 %. Further LT8611 characteristics are a adjustable 700 kHz switching frequency and 1 available package option(s): QFN-24 .

For the LT8611 replacement search, please select a main parameter tolerance value and adjust the checkboxes for feature match. The product counter within the button shows the number of available equivalents and a click on the replacement button shows all possible replacements within a parametric overview.

ParameterValueReplacement
Search Filter
V-IN min. 3.40 V
V-IN max. 42.00 V
I-OUT? 2.50 A
V-OUT min. 0.97 V
V-OUT max. 40.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 700 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 2200 kHz
Softstart yes
Softstart adjustable yes
Tracking yes
PG/Power OK yes
Quiescent current max. 500 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 4.70 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 96 %
Component count min. 10
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN QFN-24
SO/SOIC
SOP
DIP
TO
DDPAK

LT8611 Datasheet

Link to the most up-to-date LT8611 datasheet and the product page for EVM, tools and support information.

LT8611

LT8611 Sample stock and distributor price breaks

LT8611 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 5

Chip One Stop (2)

ProductStockPriceBuy
LT8611EUDD#PBF392
18.37 USD
108.10 USD
505.36 USD
1464.63 USD
2924.57 USD
Buy Now
LT8611IUDD#PBF9
110.50 USD
Buy Now

Digi-Key (2)

ProductStockPriceBuy
LT8611EUDD#PBF2419
18.12 USD
255.43 USD
1004.61 USD
Buy Now
LT8611IUDD#PBF13
18.87 USD
255.94 USD
1005.05 USD
Buy Now
LT8611EUDD#TRPBF0
25004.71 USD
Buy Now
LT8611IUDD#TRPBF0
25005.15 USD
Buy Now

Element14 (1)

ProductStockPriceBuy
LT8611EUDD#PBF2929
112.52 USD
258.37 USD
1007.11 USD
Buy Now

Farnell Element14 (1)

ProductStockPriceBuy
LT8611EUDD#PBF3834Buy Now

RS Components (3)

ProductStockPriceBuy
LT8611EUDD#PBF26Buy Now
LT8611EUDD#PBF149Buy Now
LT8611IUDD#PBF76Buy Now

Available Distributors without stock: 1

Newark Electronics (0)

ProductStockPriceBuy
LT8611EUDD#PBF0
18.12 USD
255.44 USD
1004.61 USD
Buy Now
LT8611EUDD#TRPBF0
17.88 USD
25005.65 USD
Buy Now
LT8611IUDD#PBF0
18.89 USD
255.96 USD
1005.05 USD
Buy Now

Available Distributors with stock: 0

no online Distributor with LT8611 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT8611. Optional, compare LT8611 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT8610 LT8610 product overviewLT8610 product overview Linear Technology MSOP-16
10% LT3690 LT3690 product overviewLT3690 product overview Linear Technology QFN-26
10% LM43603 LM43603 product overviewLM43603 product overview Texas Instruments HTSSOP-16
10% LM43603-Q1 LM43603-Q1 product overviewLM43603-Q1 product overview Texas Instruments HTSSOP-16
25% LM43602 LM43602 product overviewLM43602 product overview Texas Instruments HTSSOP-16
25% LM43602-Q1 LM43602-Q1 product overviewLM43602-Q1 product overview Texas Instruments HTSSOP-16
25% LM46002 LM46002 product overviewLM46002 product overview Texas Instruments HTSSOP-16
25% LM46002-Q1 LM46002-Q1 product overviewLM46002-Q1 product overview Texas Instruments HTSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT8611.

V-IN max. 42 V, I-OUT 2.5 A, V-OUT min. 0.97 V, Frequency typ. 700 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404042015 1.5 3.0 4.3 31.00 4 x 4 x 1.8
74404052015 1.5 3.3 4.9 25.70 5 x 5 x 2
74404052022 2.2 3.0 3.6 31.60 5 x 5 x 2
74404054022 2.2 3.8 5.3 19.00 5 x 5 x 4
74404063022 2.2 3.8 5.6 20.00 6 x 6 x 2.8
7440520018 1.8 2.6 3.0 30.00 5.8 x 5.8 x 2
7440620015 1.5 4.3 4.0 10.00 6.8 x 6.8 x 2.5
7440650022 2.2 6.2 5.9 11.00 10 x 10 x 3.1
7440690016 1.6 3.1 3.3 29.00 8 x 8 x 1.5
7440700022 2.2 4.6 3.2 17.00 8 x 8 x 2
74408942022 2.2 2.5 4.0 38.00 4.8 x 4.8 x 3.1
74408943022 2.2 3.0 4.6 26.00 4.8 x 4.8 x 4.1
74437321015 1.5 3.0 4.0 55.00 4.45 x 4.06 x 1.2
74438336015 1.5 3.7 4.5 33.00 3 x 3 x 2
7447462022 2.2 6.3 4.3 10.00 5.5 x 5.5 x 8.5
744773014 1.4 3.4 5.0 22.00 4 x 4.5 x 3.5
744773018 1.8 2.7 3.6 28.00 4 x 4.5 x 3.5
744773022 2.2 2.5 3.4 34.00 4 x 4.5 x 3.5
7447779002 2.2 4.2 6.0 16.00 7.3 x 7.3 x 4.5
744778002 2.2 4.0 4.8 14.00 7.3 x 7.3 x 3.4
7447785002 2.2 2.9 3.3 43.00 5.9 x 6.2 x 3.3
7447786002 2.2 3.5 4.0 40.00 5.9 x 6.2 x 5.1
7447789002 2.2 4.0 4.8 19.00 7.3 x 7.3 x 3.5
784773018 1.8 2.7 3.6 28.00 4 x 4.5 x 3.5
784773022 2.2 2.5 3.4 34.00 4 x 4.5 x 3.5
784775022 2.2 6.0 6.0 8.00 7 x 7.8 x 5.5
784777022 2.2 2.7 5.3 51.00 7.3 x 7.3 x 4.3
784778022 2.2 3.1 5.0 42.00 7.3 x 7.3 x 3.5
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