LT3971 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3971 is a 38.00 V non-sync Buck Converter from with 1.20 A output current. The maximum 38.00 V input voltage can be regulated down into a 1.19 V to 30.00 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 8 and achieves a peak efficiency of 89 %. Further LT3971 characteristics are a adjustable 2000 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3971 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. 4.30 V
V-IN max. 38.00 V
I-OUT? 1.20 A
V-OUT min. 1.19 V
V-OUT max. 30.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 2000 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 250 kHz
Frequency adj./ ext.clock max 2000 kHz
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 4.5 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 89 %
Component count min. 8
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-10
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3971 Datasheet

Link to the most up-to-date LT3971 datasheet and the product page for EVM, tools and support information.

LT3971

LT3971 Sample stock and distributor price breaks

LT3971 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 9

Chip One Stop (13)

ProductStockPriceBuy
LT3971AIMSE#PBF4
15.38 USD
Buy Now
LT3971EDD-3.3#PBF26
14.18 USD
Buy Now
LT3971EDD#PBF321
14.18 USD
1003.92 USD
Buy Now
LT3971EMSE-3.3#PBF68
16.31 USD
105.86 USD
503.88 USD
Buy Now
LT3971EMSE-3.3#PBF680
14.16 USD
1003.91 USD
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LT3971EMSE-5#PBF50
17.68 USD
104.51 USD
503.85 USD
Buy Now
LT3971EMSE-5#PBF1
14.49 USD
Buy Now
LT3971EMSE#PBF205
16.27 USD
105.86 USD
503.88 USD
1003.47 USD
2003.42 USD
Buy Now
LT3971EMSE#PBF697
14.16 USD
1003.91 USD
Buy Now
LT3971IDD#PBF27
14.57 USD
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LT3971IMSE-3.3#PBF699
14.57 USD
1004.35 USD
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LT3971IMSE-5#PBF92
14.63 USD
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LT3971IMSE#PBF525
14.57 USD
1004.35 USD
Buy Now

Conrad COM (2)

ProductStockPriceBuy
LT3971EMSE-3.3#PBF2Buy Now
LT3971IMSE#PBF4Buy Now

Conrad UK (2)

ProductStockPriceBuy
LT3971EMSE-3.3#PBF2Buy Now
LT3971IMSE#PBF4Buy Now

Digi-Key (13)

ProductStockPriceBuy
LT3971EMSE#PBF2090
16.00 USD
254.01 USD
1003.41 USD
Buy Now
LT3971EDD-5#PBF1039
16.00 USD
254.01 USD
1003.41 USD
Buy Now
LT3971EMSE-5#PBF838
16.00 USD
254.01 USD
1003.41 USD
Buy Now
LT3971EDD#PBF683
16.00 USD
254.01 USD
1003.41 USD
Buy Now
LT3971EMSE-3.3#PBF617
16.00 USD
254.01 USD
1003.41 USD
Buy Now
LT3971EDD-3.3#PBF404
16.00 USD
254.01 USD
1003.41 USD
Buy Now
LT3971IMSE#PBF575
16.66 USD
254.46 USD
1003.79 USD
Buy Now
LT3971IMSE-3.3#PBF386
16.66 USD
254.46 USD
1003.79 USD
Buy Now
LT3971IDD-5#PBF540
16.66 USD
254.46 USD
1003.79 USD
Buy Now
LT3971IMSE16#PBF62
16.82 USD
254.58 USD
1003.89 USD
Buy Now
LT3971AIMSE#PBF20
17.30 USD
254.89 USD
1004.15 USD
Buy Now
LT3971EMSE16#PBF15
16.20 USD
254.15 USD
1003.53 USD
Buy Now
LT3971IDD#PBF3
16.66 USD
254.46 USD
1003.79 USD
Buy Now
LT3971EDD#TRPBF0
25003.51 USD
Buy Now
LT3971EMSE#TRPBF0
25003.51 USD
Buy Now
LT3971EMSE-3.3#TRPBF0
25003.51 USD
Buy Now
LT3971EMSE-5#TRPBF0
25003.51 USD
Buy Now
LT3971EDD-3.3#TRPBF0
25003.51 USD
Buy Now
LT3971EDD-5#TRPBF0
25003.51 USD
Buy Now
LT3971EMSE16#TRPBF0
25003.63 USD
Buy Now
LT3971IMSE-5#PBF0
2003.79 USD
Buy Now
LT3971IDD-3.3#PBF0
2423.79 USD
Buy Now
LT3971IDD#TRPBF0
25003.90 USD
Buy Now
LT3971IMSE#TRPBF0
25003.90 USD
Buy Now
LT3971IMSE-3.3#TRPBF0
25003.90 USD
Buy Now

Distrelec (3)

ProductStockPriceBuy
LT3971EDD#PBF9Buy Now
LT3971EMSE#PBF80Buy Now
LT3971IMSE-5#PBF115Buy Now

Element14 (3)

ProductStockPriceBuy
LT3971EDD-3.30
19.46 USD
256.59 USD
Buy Now
LT3971EDD-50
19.46 USD
256.59 USD
1005.68 USD
Buy Now
LT3971EDD#PBF392
19.43 USD
256.30 USD
1005.36 USD
Buy Now
LT3971EMSE#PBF300
19.43 USD
256.30 USD
1005.36 USD
Buy Now
LT3971IMSE#PBF169
110.46 USD
257.01 USD
1005.97 USD
Buy Now

Farnell Element14 (6)

ProductStockPriceBuy
LT3971AIMSE#PBF66Buy Now
LT3971EDD-3.30Buy Now
LT3971EDD-50Buy Now
LT3971EDD#PBF450Buy Now
LT3971EMSE16#PBF17Buy Now
LT3971EMSE#PBF542Buy Now
LT3971IMSE16#PBF11Buy Now
LT3971IMSE#PBF169Buy Now

Newark Electronics (2)

ProductStockPriceBuy
LT3971EDD#PBF21
12.99 USD
252.99 USD
1002.99 USD
Buy Now
LT3971EMSE-5#PBF207
12.99 USD
252.99 USD
1002.99 USD
Buy Now

RS Components (3)

ProductStockPriceBuy
LT3971EMSE#PBF36Buy Now
LT3971EMSE#PBF75Buy Now
LT3971IDD#PBF50Buy Now

Available Distributors with stock: 10

Arrow Electronics

ProductStockPriceBuy
LT3971IMSE-3.3#PBF 699
14.37 $
1003.72 $
Buy Now
LT3971EMSE#PBF 697
13.93 $
1003.34 $
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LT3971EMSE-3.3#PBF 680
13.93 $
1003.34 $
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LT3971IMSE#PBF 525
14.37 $
1003.72 $
Buy Now
LT3971EDD#PBF 321
13.93 $
1003.34 $
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LT3971IMSE-5#PBF 92
14.37 $
1003.72 $
Buy Now
LT3971IDD#PBF 27
14.37 $
1003.72 $
Buy Now
LT3971EDD-3.3#PBF 26
13.93 $
1003.34 $
Buy Now
LT3971EMSE-5#PBF 1
13.93 $
1003.34 $
Buy Now
LT3971EMSE#PBF 0
13.93 $
1003.34 $
Buy Now
LT3971EMSE-5#PBF 0
13.93 $
1003.34 $
Buy Now
LT3971EMSE-5#PBF 0
13.93 $
1003.34 $
Buy Now
LT3971EMSE-3.3#PBF 0
13.93 $
1003.34 $
Buy Now
LT3971EMSE-3.3#PBF 0
13.93 $
1003.34 $
Buy Now
LT3971AIMSE#PBF 0
14.79 $
1004.07 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3971EMSE#PBF 2090
1002.74 €
253.22 €
14.83 €
Buy Now
LT3971EDD-5#PBF 1039
1002.74 €
253.22 €
14.83 €
Buy Now
LT3971EMSE-5#PBF 838
1002.74 €
253.22 €
14.83 €
Buy Now
LT3971EDD#PBF 683
1002.74 €
253.22 €
14.83 €
Buy Now
LT3971EMSE-3.3#PBF 617
1002.74 €
253.22 €
14.83 €
Buy Now
LT3971IMSE#PBF 575
1003.05 €
253.59 €
15.36 €
Buy Now
LT3971IDD-5#PBF 540
1003.05 €
253.59 €
15.36 €
Buy Now
LT3971EDD-3.3#PBF 404
1002.74 €
253.22 €
14.83 €
Buy Now
LT3971IMSE-3.3#PBF 386
1003.05 €
253.59 €
15.36 €
Buy Now
LT3971IMSE16#PBF 62
1003.13 €
253.68 €
15.49 €
Buy Now
LT3971AIMSE#PBF 20
1003.34 €
253.93 €
15.87 €
Buy Now
LT3971EMSE16#PBF 15
1002.84 €
253.34 €
14.99 €
Buy Now
LT3971IDD#PBF 3
1003.05 €
253.59 €
15.36 €
Buy Now
LT3971EDD#TRPBF 0
25002.82 €
Buy Now
LT3971EMSE#TRPBF 0
25002.82 €
Buy Now
show stock=0hide stock=0

Newark element14

ProductStockPriceBuy
LT3971EDD#PBF 21
12.99 $
252.99 $
1002.99 $
Buy Now
LT3971EMSE-5#PBF 207
12.99 $
252.99 $
1002.99 $
Buy Now

Mouser Electronics

ProductStockPriceBuy
LT3971EMSE#PBF 493
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971IMSE#PBF 200
16.68 $
106.12 $
254.46 $
1003.80 $
Buy Now
LT3971EDD-3.3#PBF 121
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EMSE-3.3#PBF 200
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EDD#PBF 121
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EDD-5#PBF 121
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EMSE-5#PBF 35
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971IMSE16#PBF 0
16.83 $
106.26 $
254.58 $
1003.89 $
Buy Now
LT3971EDD#TRPBF 0
16.87 $
106.38 $
256.13 $
1004.22 $
2503.86 $
Buy Now
LT3971EMSE-5#TRPBF 0
16.87 $
106.38 $
256.13 $
1004.22 $
2503.86 $
Buy Now
LT3971AIMSE#PBF 0
17.32 $
106.71 $
254.89 $
1004.16 $
Buy Now
LT3971IDD#TRPBF 0
17.62 $
107.07 $
256.80 $
1004.68 $
2504.29 $
Buy Now
LT3971IDD#PBF 0
16.68 $
106.12 $
254.46 $
1003.80 $
Buy Now
LT3971IMSE16#TRPBF 0
17.79 $
107.23 $
256.95 $
1004.79 $
2504.39 $
Buy Now
LT3971EMSE#TRPBF 0
16.87 $
106.38 $
256.13 $
1004.22 $
2503.86 $
Buy Now
show stock=0hide stock=0

Quest Components

ProductStockPriceBuy
LT3971IDD#TRA1PBF 872
4354.45 $
2114.61 $
19.54 $
Buy Now

ComS.I.T.

ProductStockPriceBuy
LT3971EDD33PBF 2

element14 Asia-Pacific

ProductStockPriceBuy
LT3971EDD-5 0
17.57 $
255.27 $
1004.54 $
Buy Now
LT3971EDD#PBF 392
17.54 $
255.04 $
1004.28 $
Buy Now
LT3971EDD-3.3 0
17.57 $
255.27 $
Buy Now
LT3971IMSE#PBF 169
18.37 $
255.61 $
1004.77 $
Buy Now
LT3971EMSE#PBF 300
17.54 $
255.04 $
1004.28 $
Buy Now
show stock=0hide stock=0

Farnell element14

ProductStockPriceBuy
LT3971EMSE16#PBF 17
12.56 GBP
Buy Now
LT3971IMSE16#PBF 11
12.79 GBP
Buy Now
LT3971AIMSE#PBF 5
15.99 GBP
105.47 GBP
253.36 GBP
503.35 GBP
1003.34 GBP
Buy Now
LT3971EDD#PBF 420
14.97 GBP
104.50 GBP
254.14 GBP
503.79 GBP
1003.43 GBP
Buy Now
LT3971EMSE#PBF 452
14.97 GBP
104.50 GBP
254.14 GBP
503.79 GBP
1003.43 GBP
Buy Now
LT3971IMSE#PBF 169
15.49 GBP
104.99 GBP
254.60 GBP
504.21 GBP
1003.82 GBP
Buy Now

Chip1Stop

ProductStockPriceBuy
LT3971EMSE-5#PBF 1
14.49 $
Buy Now
LT3971EMSE-5#PBF 50
503.85 $
104.51 $
17.68 $
Buy Now
LT3971EMSE-3.3#PBF 68
503.88 $
105.86 $
16.31 $
Buy Now
LT3971AIMSE#PBF 4
15.38 $
Buy Now
LT3971EDD#PBF 321
1003.92 $
14.18 $
Buy Now
LT3971EDD-3.3#PBF 26
14.18 $
Buy Now
LT3971EMSE#PBF 697
1003.91 $
14.16 $
Buy Now
LT3971EMSE#PBF 205
2003.42 $
503.88 $
16.27 $
Buy Now
LT3971EMSE-3.3#PBF 680
1003.91 $
14.16 $
Buy Now
LT3971IDD#PBF 27
14.57 $
Buy Now
LT3971IMSE#PBF 525
1004.35 $
14.57 $
Buy Now
LT3971IMSE-3.3#PBF 699
1004.35 $
14.57 $
Buy Now
LT3971IMSE-5#PBF 92
14.63 $
Buy Now

RS Components

ProductStockPriceBuy
LT3971IDD#PBF 50
105.86 GBP
255.77 GBP
505.71 GBP
755.62 GBP
Buy Now
LT3971EMSE#PBF 75
104.81 GBP
254.31 GBP
504.08 GBP
754.03 GBP
Buy Now
LT3971EMSE#PBF 36
15.06 GBP
104.81 GBP
254.31 GBP
504.08 GBP
754.03 GBP
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3971. Optional, compare LT3971 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% A8582 A8582 product overviewA8582 product overview Allegro TSSOP-16
0% LT3971A LT3971A product overviewLT3971A product overview Linear Technology MSOP-8
0% LT3980 LT3980 product overviewLT3980 product overview Linear Technology DFN-14, MSOP-16
0% LT3991 LT3991 product overviewLT3991 product overview Linear Technology DFN-10, MSOP-10
0% TPS54140A TPS54140A product overviewTPS54140A product overview Texas Instruments SON-10, MSOP-10
0% TPS54262-Q1 TPS54262-Q1 product overviewTPS54262-Q1 product overview Texas Instruments HTSSOP-20
10% LT3480 LT3480 product overviewLT3480 product overview Linear Technology DFN-10, MSOP-10
10% LT3481 LT3481 product overviewLT3481 product overview Linear Technology DFN-10, MSOP-10
10% LT3682 LT3682 product overviewLT3682 product overview Linear Technology DFN-12
10% LM26001 LM26001 product overviewLM26001 product overview Texas Instruments HTSSOP-16
10% LM26001-Q1 LM26001-Q1 product overviewLM26001-Q1 product overview Texas Instruments HTSSOP-16
10% TPS54162-Q1 TPS54162-Q1 product overviewTPS54162-Q1 product overview Texas Instruments HTSSOP-20
10% TPS57160-Q1 TPS57160-Q1 product overviewTPS57160-Q1 product overview Texas Instruments SON-10, MSOP-10
50% MP2454 MP2454 product overviewMP2454 product overview MPS QFN-10, MSOP-10
50% MPQ2454 MPQ2454 product overviewMPQ2454 product overview MPS QFN-10, MSOP-10
50% MPQ2454-AEC1 MPQ2454-AEC1 product overviewMPQ2454-AEC1 product overview MPS QFN-10, MSOP-10

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3971.

V-IN max. 38 V, I-OUT 1.2 A, V-OUT min. 1.19 V, Frequency typ. 2000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025001 1.2 2.6 3.0 36.00 2.8 x 2.8 x 3
744031001 1.5 1.8 1.6 40.00 3.8 x 3.8 x 1.8
74404024015 1.5 1.9 2.4 65.00 2.5 x 2 x 1.2
74404032015 1.5 2.0 2.3 40.00 3 x 3 x 1.5
7440420018 1.8 2.4 2.4 40.00 4.8 x 4.8 x 2
7440430012 1.2 3.1 2.8 15.00 4.8 x 4.8 x 3
7440430018 1.8 2.7 2.5 20.00 4.8 x 4.8 x 3
7440520018 1.8 2.6 3.0 30.00 5.8 x 5.8 x 2
7440680017 1.7 2.5 2.4 41.00 8 x 8 x 1.2
74438343015 1.5 1.3 3.0 150.00 2.5 x 1.6 x 0.6
74479976215 1.5 1.6 1.9 100.00 2 x 1.6 x 0.5
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