LT3971-5.0 Buck Converter overview

Description

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Category
Sub-Category

LT3971-5.0 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 5.00 V to 5.00 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 6 and achieves a peak efficiency of 89 %. Further LT3971-5.0 characteristics are a adjustable 2000 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3971-5.0 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. 5.00 V
V-OUT max. 5.00 V
V-OUT 5.000 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. 6
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-10
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3971-5.0 Datasheet

Link to the most up-to-date LT3971-5.0 datasheet and the product page for EVM, tools and support information.

LT3971-5.0

LT3971-5.0 Sample stock and distributor price breaks

LT3971-5.0 prices and online available distributors.

OEMSecrets.com
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Available Distributors with stock: 0

no online Distributor with LT3971 stock available

Available Distributors with stock: 10

Arrow Electronics

ProductStockPriceBuy
LT3971EDD#TRPBF 2250
25003.44 $
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LT3971EDD#PBF 250
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
16.32 $
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LT3971EMSE-5#PBF 194
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
16.32 $
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LT3971IMSE-3.3#PBF 147
5003.59 $
2503.68 $
1003.72 $
254.68 $
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LT3971EDD-3.3#PBF 110
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
16.32 $
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LT3971EMSE-5#PBF 39
2503.39 $
1003.46 $
254.19 $
16.32 $
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LT3971EMSE#PBF 7
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
16.32 $
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LT3971EMSE-3.3#PBF 4
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
16.32 $
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LT3971IDD#PBF 2
10003.45 $
5003.58 $
2503.67 $
1003.72 $
254.67 $
17.04 $
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LT3971EMSE-3.3#PBF 0
2503.39 $
2003.46 $
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LT3971EMSE-3.3#PBF 0
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
16.32 $
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LT3971EDD#TRPBF 0
25003.44 $
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LT3971IMSE16#PBF 0
5003.68 $
2503.77 $
1853.81 $
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LT3971IDD#TRPBF 0
25003.82 $
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LT3971IMSE-3.3#TRPBF 0
25003.82 $
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show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3971EMSE-3.3#PBF 2364
1003.28 €
253.97 €
15.98 €
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LT3971EMSE#TRPBF 2173
1003.48 €
254.21 €
16.34 €
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LT3971EMSE#TRPBF 2173
1003.48 €
254.21 €
16.34 €
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LT3971IMSE#PBF 1818
1003.65 €
254.41 €
16.65 €
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LT3971EMSE-5#PBF 1504
1003.28 €
253.97 €
15.98 €
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LT3971EMSE-5#TRPBF 1396
1003.48 €
254.21 €
16.34 €
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LT3971EMSE#PBF 563
1003.28 €
253.97 €
15.98 €
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LT3971AIMSE#PBF 462
1004.00 €
254.84 €
17.29 €
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LT3971EDD-3.3#PBF 351
1003.28 €
253.97 €
15.98 €
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LT3971IMSE-3.3#PBF 307
1003.65 €
254.41 €
16.65 €
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LT3971IMSE16#PBF 285
1003.74 €
254.52 €
16.81 €
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LT3971IDD-5#PBF 141
1003.65 €
254.41 €
16.65 €
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LT3971EDD#PBF 115
1003.28 €
253.97 €
15.98 €
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LT3971EMSE#TRPBF 0
25003.12 €
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LT3971EMSE-5#TRPBF 0
25003.12 €
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show stock=0hide stock=0

Verical

ProductStockPriceBuy
LT3971EDD#PBF 250
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
26.32 $
Buy Now
LT3971EMSE-5#PBF 194
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
26.32 $
Buy Now
LT3971IMSE-3.3#PBF 147
5003.59 $
2503.68 $
1003.72 $
254.68 $
27.05 $
Buy Now
LT3971EDD-3.3#PBF 110
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
26.32 $
Buy Now
LT3971EMSE-5#PBF 39
2503.39 $
1003.46 $
254.19 $
26.32 $
Buy Now
LT3971IMSE16#PBF 9
2504.11 $
1004.22 $
504.34 $
254.47 $
34.61 $
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LT3971EMSE#PBF 7
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
26.32 $
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LT3971EMSE-3.3#PBF 4
10003.09 $
5003.21 $
2503.29 $
1003.34 $
254.19 $
26.32 $
Buy Now
LT3971IDD#PBF 2
10003.45 $
5003.58 $
2503.67 $
1003.72 $
254.67 $
27.04 $
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Mouser Electronics

ProductStockPriceBuy
LT3971IDD#PBF 1074
17.41 $
254.92 $
1004.06 $
2503.86 $
5003.77 $
10003.63 $
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LT3971EMSE#PBF 1732
16.65 $
254.41 $
1003.64 $
2503.46 $
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LT3971EMSE-3.3#PBF 1604
16.65 $
254.41 $
1003.64 $
2503.46 $
5003.38 $
10003.25 $
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LT3971IMSE#PBF 538
17.41 $
254.92 $
1004.06 $
2503.86 $
5003.77 $
10003.63 $
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LT3971EDD-3.3#PBF 777
16.65 $
254.41 $
1003.64 $
2503.46 $
5003.38 $
10003.25 $
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LT3971EMSE-5#PBF 396
16.65 $
254.41 $
1003.64 $
2503.46 $
5003.38 $
10003.25 $
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LT3971EDD#PBF 318
16.65 $
254.41 $
1003.64 $
2503.46 $
5003.38 $
10003.25 $
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LT3971AIMSE#PBF 140
18.10 $
255.38 $
1004.44 $
2504.22 $
5004.13 $
10003.97 $
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Rochester Electronics

ProductStockPriceBuy
LT3971IMSE16#PBF 2368
10003.92 $
5004.13 $
1004.29 $
254.48 $
14.82 $
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Quest Components

ProductStockPriceBuy
LT3971EMSE#PBF 8
82.63 $
33.50 $
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LT3971IMSE#3GKPBF 710
5863.14 $
1363.42 $
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LT3971IMSE#3GKPBF 710
5863.14 $
1363.42 $
18.55 $
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RS Components

ProductStockPriceBuy
LT3971IDD#PBF 0
13.61 GBP
3633.52 GBP
Buy Now
LT3971IDD#PBF 438
15.97 GBP
105.67 GBP
253.97 GBP
503.77 GBP
1212.94 GBP
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LT3971IDD#PBF 438
105.67 GBP
253.97 GBP
503.77 GBP
1212.94 GBP
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LT3971EMSE#PBF 0
13.55 GBP
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LT3971EMSE#PBF 121
104.71 GBP
254.11 GBP
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LT3971EMSE#PBF 121
15.31 GBP
104.71 GBP
254.11 GBP
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show stock=0hide stock=0

ComS.I.T.

ProductStockPriceBuy
LT3971EDD33PBF 2

Chip1Stop

ProductStockPriceBuy
LT3971EMSE#PBF 30
12.60 $
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LT3971EMSE-5#PBF 6
13.41 $
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LT3971EMSE-3.3#PBF 40
104.97 $
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IChunt

ProductStockPriceBuy
LT3971EMSE-5#TRPBF 1396
155.69 CNY
2536.99 CNY
10030.58 CNY
Buy Now
LT3971EDD#PBF 115
152.91 CNY
2535.11 CNY
10029.03 CNY
Buy Now
LT3971AIMSE#PBF 462
164.43 CNY
2542.77 CNY
10035.37 CNY
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Available Distributors without stock: 2

element14 Asia-Pacific

ProductStockPriceBuy
LT3971EDD#PBF 0
5005.18 SGD
2505.30 SGD
1005.58 SGD
256.75 SGD
110.16 SGD
Buy Now
LT3971EMSE#PBF 0
5005.18 SGD
2505.30 SGD
1005.58 SGD
256.75 SGD
110.16 SGD
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Farnell element14

ProductStockPriceBuy
LT3971AIMSE#PBF 0
5003.32 GBP
2503.33 GBP
1003.34 GBP
503.35 GBP
253.36 GBP
105.47 GBP
15.99 GBP
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LT3971EDD#PBF 0
5002.72 GBP
2502.79 GBP
1002.86 GBP
503.16 GBP
253.46 GBP
105.23 GBP
15.75 GBP
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LT3971EDD-3.3 0
1003.08 GBP
253.14 GBP
15.19 GBP
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LT3971EDD-5 0
1002.93 GBP
252.99 GBP
14.95 GBP
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LT3971EMSE#PBF 0
5002.56 GBP
2502.66 GBP
1002.76 GBP
502.86 GBP
252.96 GBP
104.07 GBP
14.91 GBP
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LT3971EMSE16#PBF 0
102.04 GBP
12.08 GBP
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LT3971IMSE#PBF 0
502.64 GBP
252.86 GBP
103.19 GBP
13.85 GBP
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LT3971IMSE16#PBF 0
12.33 GBP
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List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3971-5.0. Optional, compare LT3971-5.0 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3991-5.0 LT3991-5.0 product overviewLT3991-5.0 product overview Linear Technology DFN-10, MSOP-10

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3971-5.0.

V-IN max. 38 V, I-OUT 1.2 A, V-OUT min. 5 V, Frequency typ. 2000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025004 4.7 1.4 1.7 100.00 2.8 x 2.8 x 3
74404041047 4.7 1.6 1.9 91.00 4 x 4 x 1.2
74404042047 4.7 1.7 2.2 70.00 4 x 4 x 1.8
74404052039 3.9 2.4 2.8 50.50 5 x 5 x 2
74404052047 4.7 2.3 2.7 55.90 5 x 5 x 2
74404052056 5.6 2.1 2.6 67.50 5 x 5 x 2
7440420039 3.9 1.8 1.7 60.00 4.8 x 4.8 x 2
744042004 4.7 1.7 1.7 70.00 4.8 x 4.8 x 2
7440430039 3.9 1.7 1.7 50.00 4.8 x 4.8 x 3
744043004 4.7 1.6 1.7 50.00 4.8 x 4.8 x 3
7440450039 3.9 1.3 2.5 112.00 4.5 x 3.2 x 2.9
744045004 4.7 1.2 2.0 120.00 4.5 x 3.2 x 2.9
7440520039 3.9 2.0 2.1 50.00 5.8 x 5.8 x 2
744052005 5.0 1.7 1.8 50.00 5.8 x 5.8 x 2
744053004 4.2 2.5 2.2 30.00 5.8 x 5.8 x 3
7440530047 4.7 2.4 2.0 30.00 5.8 x 5.8 x 3
744053005 5.3 2.3 1.9 30.00 5.8 x 5.8 x 3
744062005 5.0 2.2 2.0 40.00 6.8 x 6.8 x 2.5
7440680047 4.7 1.9 1.6 72.00 8 x 8 x 1.2
7440690047 4.7 2.2 1.8 56.00 8 x 8 x 1.5
7440700047 4.7 3.0 2.2 37.00 8 x 8 x 2
7440700056 5.6 2.6 2.0 47.00 8 x 8 x 2
74408941035 3.5 1.5 2.8 113.00 4.8 x 4.8 x 2.1
74408941050 5.0 1.4 2.5 140.00 4.8 x 4.8 x 2.1
74408942047 4.7 1.6 2.9 86.80 4.8 x 4.8 x 3.1
74437321056 5.6 1.6 2.7 180.00 4.45 x 4.06 x 1.2
74438335047 4.7 1.5 2.8 141.00 3 x 3 x 1.5
744773039 3.9 1.9 2.6 54.00 4 x 4.5 x 3.5
744773047 4.7 1.8 2.5 59.00 4 x 4.5 x 3.5
744773056 5.6 1.6 2.4 69.00 4 x 4.5 x 3.5
7447785004 4.7 2.2 2.5 60.00 5.9 x 6.2 x 3.3
7447786004 4.7 2.8 2.8 57.00 5.9 x 6.2 x 5.1
78438335047 4.7 1.5 2.8 141.00 3 x 3 x 1.5
784773039 3.9 1.9 2.6 54.00 4 x 4.5 x 3.5
784773047 4.7 1.8 2.5 59.00 4 x 4.5 x 3.5
784773056 5.6 1.6 2.4 69.00 4 x 4.5 x 3.5
784778047 4.7 2.4 3.1 66.00 7.3 x 7.3 x 3.5
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