LT8611 Buck Converter overview

Description

Manufacturer
 
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: 4

Chip One Stop (1)

ProductStockPriceBuy
LT8611EUDD#PBF435
18.47 USD
108.10 USD
505.36 USD
1464.69 USD
2924.62 USD
Buy Now

Digi-Key (5)

ProductStockPriceBuy
LT8611EUDD#PBF1623
18.28 USD
255.54 USD
1004.70 USD
Buy Now
LT8611IUDD#PBF1822
19.05 USD
256.06 USD
1005.15 USD
Buy Now
LT8611EUDD#TRPBF0
25004.80 USD
Buy Now
LT8611EUDD#TRPBF1932
19.41 USD
258.41 USD
1005.77 USD
2505.28 USD
Buy Now
LT8611EUDD#TRPBF1932
19.41 USD
258.41 USD
1005.77 USD
2505.28 USD
Buy Now
DC1750A2
1170.17 USD
25128.14 USD
Buy Now
LT8611IUDD#TRPBF0
25005.25 USD
Buy Now
LT8611IUDD#TRPBF0
110.28 USD
259.17 USD
1006.30 USD
2505.78 USD
Buy Now
LT8611IUDD#TRPBF0
110.28 USD
259.17 USD
1006.30 USD
2505.78 USD
Buy Now
LT8611EUDD0
00.00 USD
Buy Now
LT8611IUDD0
00.00 USD
Buy Now

Mouser Electronics (2)

ProductStockPriceBuy
LT8611IUDD#PBF148
19.09 USD
108.33 USD
256.08 USD
1005.17 USD
Buy Now
LT8611EUDD#PBF847 On Order
18.32 USD
107.62 USD
255.56 USD
1004.72 USD
Buy Now
LT8611IUDD#TRPBFNone
25005.26 USD
Buy Now
LT8611EUDD#TRPBFNone
25004.81 USD
Buy Now

RS Components (3)

ProductStockPriceBuy
LT8611EUDD#PBF64Buy Now
LT8611EUDD#PBF65Buy Now
LT8611IUDD#PBF209Buy Now

Available Distributors without stock: 3

Distrelec (0)

ProductStockPriceBuy
LT8611IUDD#PBF0Buy Now

Farnell Element14 (0)

ProductStockPriceBuy
LT8611EUDD#PBF0Buy Now

Rutronik (0)

ProductStockPriceBuy
nnBuy Now

Available Distributors with stock: 6

Arrow Electronics

ProductStockPriceBuy
LT8611IUDD#PBF 177
15.94 $
1005.05 $
Buy Now
LT8611EUDD#TRPBF 0
1004.71 $
Buy Now
LT8611EUDD#TRPBF 0
1004.71 $
Buy Now
LT8611EUDD#PBF 0
15.43 $
1004.61 $
Buy Now
LT8611IUDD#TRPBF 0
1005.15 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT8611EUDD#TRPBF 1932
2504.51 €
1004.92 €
257.18 €
18.03 €
Buy Now
LT8611EUDD#TRPBF 1932
2504.51 €
1004.92 €
257.18 €
18.03 €
Buy Now
LT8611IUDD#PBF 1822
1004.40 €
255.17 €
17.73 €
Buy Now
LT8611EUDD#PBF 1623
1004.01 €
254.73 €
17.07 €
Buy Now
DC1750A 2
25109.40 €
1145.29 €
Buy Now
LT8611EUDD#TRPBF 0
25004.10 €
Buy Now
LT8611IUDD#TRPBF 0
25004.49 €
Buy Now
LT8611IUDD#TRPBF 0
2504.93 €
1005.38 €
257.83 €
18.78 €
Buy Now
LT8611IUDD#TRPBF 0
2504.93 €
1005.38 €
257.83 €
18.78 €
Buy Now
show stock=0hide stock=0

Mouser Electronics

ProductStockPriceBuy
LT8611IUDD#PBF 148
19.06 $
108.31 $
256.06 $
1005.15 $
Buy Now
LT8611EUDD#PBF 0
18.29 $
107.60 $
255.54 $
1004.70 $
Buy Now
LT8611IUDD#TRPBF 0
25005.25 $
Buy Now
LT8611EUDD#TRPBF 0
25004.80 $
Buy Now
show stock=0hide stock=0

ComS.I.T.

ProductStockPriceBuy
LT8611EUDDPBF 25
LT8611IUDDTRPBF 267

Chip1Stop

ProductStockPriceBuy
LT8611EUDD#PBF 33
108.10 $
18.47 $
Buy Now

RS Components

ProductStockPriceBuy
LT8611EUDD#PBF 44
16.45 GBP
155.88 GBP
375.32 GBP
Buy Now
LT8611EUDD#PBF 45
155.88 GBP
375.32 GBP
Buy Now
LT8611IUDD#PBF 179
156.75 GBP
376.41 GBP
Buy Now

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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