LT3971-5.0 Buck Converter overview

Description

Manufacturer
 
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
findchips.com

Available Distributors with stock: 10

Chip One Stop (2)

ProductStockPriceBuy
LT3971EMSE-5#PBF50
17.68 USD
104.51 USD
503.85 USD
Buy Now
LT3971EMSE#PBF155
16.27 USD
105.28 USD
503.57 USD
1003.47 USD
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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-5#PBF1183
16.00 USD
254.01 USD
1003.41 USD
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LT3971EDD-5#PBF730
16.00 USD
254.01 USD
1003.41 USD
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LT3971EMSE#PBF351
16.00 USD
254.01 USD
1003.41 USD
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LT3971EDD#PBF260
16.00 USD
254.01 USD
1003.41 USD
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LT3971EDD-3.3#PBF538
16.00 USD
254.01 USD
1003.41 USD
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LT3971IMSE#PBF575
16.66 USD
254.46 USD
1003.79 USD
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LT3971IDD-5#PBF540
16.66 USD
254.46 USD
1003.79 USD
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LT3971EMSE-5#TRPBF2500
25003.51 USD
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LT3971EMSE-5#TRPBF2500
16.86 USD
256.12 USD
1004.21 USD
2503.86 USD
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LT3971EMSE-5#TRPBF2500
16.86 USD
256.12 USD
1004.21 USD
2503.86 USD
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LT3971EMSE#TRPBF0
25003.51 USD
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LT3971EMSE#TRPBF2415
16.86 USD
256.12 USD
1004.21 USD
2503.86 USD
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LT3971EMSE#TRPBF2415
16.86 USD
256.12 USD
1004.21 USD
2503.86 USD
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LT3971EMSE-3.3#PBF0
16.00 USD
254.01 USD
1003.41 USD
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LT3971IMSE-3.3#PBF0
16.66 USD
254.46 USD
1003.79 USD
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LT3971AIMSE#PBF0
17.30 USD
254.89 USD
1004.15 USD
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LT3971IDD#PBF3
16.66 USD
254.46 USD
1003.79 USD
Buy Now
LT3971EDD#TRPBF0
25003.51 USD
Buy Now
LT3971EMSE-3.3#TRPBF0
25003.51 USD
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LT3971EDD-3.3#TRPBF0
25003.51 USD
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LT3971EDD-5#TRPBF0
25003.51 USD
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LT3971EMSE16#TRPBF0
25003.63 USD
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LT3971IMSE-5#PBF0
2003.79 USD
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LT3971IDD-3.3#PBF0
2423.79 USD
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LT3971IDD#TRPBF0
25003.90 USD
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Distrelec (3)

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LT3971EDD#PBF9Buy Now
LT3971EMSE#PBF77Buy Now
LT3971IMSE-5#PBF95Buy Now

Element14 (3)

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LT3971EDD#PBF392
19.15 USD
256.12 USD
1005.20 USD
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LT3971EMSE#PBF262
19.15 USD
256.12 USD
1005.20 USD
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LT3971IMSE#PBF159
110.16 USD
256.80 USD
1005.79 USD
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Farnell Element14 (5)

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LT3971AIMSE#PBF0Buy Now
LT3971EDD-3.30Buy Now
LT3971EDD-50Buy Now
LT3971EDD#PBF412Buy Now
LT3971EMSE16#PBF17Buy Now
LT3971EMSE#PBF349Buy Now
LT3971IMSE16#PBF8Buy Now
LT3971IMSE#PBF169Buy Now

Mouser Electronics (7)

ProductStockPriceBuy
LT3971IMSE#PBF200
16.85 USD
106.28 USD
254.58 USD
1003.89 USD
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LT3971EMSE#PBF86
16.16 USD
105.65 USD
254.11 USD
1003.50 USD
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LT3971EMSE-5#PBF46
16.16 USD
105.65 USD
254.11 USD
1003.50 USD
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LT3971EDD-3.3#PBF86
16.16 USD
105.65 USD
254.11 USD
1003.50 USD
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LT3971EDD#PBF71
16.16 USD
105.65 USD
254.11 USD
1003.50 USD
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LT3971EDD-5#PBF93
16.16 USD
105.65 USD
254.11 USD
1003.50 USD
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LT3971EMSE-3.3#PBF450 On Order
16.16 USD
105.65 USD
254.11 USD
1003.50 USD
Buy Now
LT3971EMSE-5#TRPBFNone
25003.60 USD
Buy Now
LT3971IDD#PBFNone
2423.89 USD
Buy Now
LT3971AIMSE#PBFNone
2004.25 USD
Buy Now
LT3971IDD#TRPBFNone
25004.00 USD
Buy Now
LT3971IDD-3.3#TRPBFNone
25004.00 USD
Buy Now
LT3971IMSE16#PBFNone
2223.99 USD
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LT3971EMSE-3.3#TRPBFNone
25003.60 USD
Buy Now
LT3971EDD#TRPBFNone
25003.60 USD
Buy Now
LT3971EMSE#TRPBFNone
25003.60 USD
Buy Now
LT3971IMSE#TRPBFNone
25004.00 USD
Buy Now
LT3971AIMSE#TRPBFNone
25004.36 USD
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LT3971IMSE-5#PBFNone
2003.89 USD
Buy Now
LT3971IMSE-3.3#PBFNone
2003.89 USD
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LT3971EMSE16#PBFNone
2223.61 USD
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LT3971AIMSE-5#PBFNone
2004.25 USD
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LT3971IDD-5#PBFNone
2423.89 USD
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LT3971IDD-3.3#PBFNone
2423.89 USD
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LT3971EDD-3.3#TRPBFNone
25003.60 USD
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LT3971EDD-5#TRPBFNone
25003.60 USD
Buy Now
LT3971EMSE16#TRPBFNone
25003.73 USD
Buy Now
LT3971IDD-5#TRPBFNone
25004.00 USD
Buy Now
LT3971IMSE-3.3#TRPBFNone
25004.00 USD
Buy Now
LT3971IMSE-5#TRPBFNone
25004.00 USD
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LT3971IMSE16#TRPBFNone
25004.09 USD
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LT3971AIMSE-5#TRPBFNone
25004.36 USD
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Newark Electronics (2)

ProductStockPriceBuy
LT3971EDD#PBF7
12.99 USD
252.99 USD
1002.99 USD
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LT3971EMSE-5#PBF69
11.30 USD
251.30 USD
1001.30 USD
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RS Components (3)

ProductStockPriceBuy
LT3971EMSE#PBF26Buy Now
LT3971EMSE#PBF51Buy Now
LT3971IDD#PBF164Buy Now

Available Distributors without stock: 1

Rutronik (0)

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nnBuy Now

Available Distributors with stock: 10

Arrow Electronics

ProductStockPriceBuy
LT3971EMSE#PBF 448
13.93 $
1003.34 $
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LT3971EMSE-5#PBF 381
13.93 $
1003.34 $
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LT3971IMSE-5#PBF 75
14.37 $
1003.72 $
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LT3971IMSE#PBF 25
14.37 $
1003.72 $
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LT3971AIMSE#PBF 4
14.79 $
1004.07 $
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LT3971IDD#PBF 2
14.37 $
1003.72 $
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LT3971AIMSE#PBF 0
14.79 $
1004.07 $
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LT3971EMSE-5#PBF 0
13.93 $
1003.34 $
Buy Now
LT3971EMSE-3.3#TRPBF 0
1003.44 $
Buy Now
LT3971IDD-5#PBF 0
14.37 $
1003.72 $
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LT3971IDD-3.3#TRPBF 0
1003.82 $
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LT3971IMSE-5#TRPBF 0
1003.82 $
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LT3971EMSE-5#TRPBF 0
1003.44 $
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LT3971EDD-3.3#TRPBF 0
1003.44 $
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LT3971EDD-5#PBF 0
13.93 $
1003.34 $
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show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3971EMSE-5#TRPBF 2500
25002.99 €
Buy Now
LT3971EMSE-5#TRPBF 2500
2503.29 €
1003.59 €
255.22 €
15.85 €
Buy Now
LT3971EMSE-5#TRPBF 2500
2503.29 €
1003.59 €
255.22 €
15.85 €
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LT3971EMSE#TRPBF 2415
2503.29 €
1003.59 €
255.22 €
15.85 €
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LT3971EMSE#TRPBF 2415
2503.29 €
1003.59 €
255.22 €
15.85 €
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LT3971EMSE-5#PBF 1183
1002.91 €
253.42 €
15.12 €
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LT3971EDD-5#PBF 730
1002.91 €
253.42 €
15.12 €
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LT3971IMSE#PBF 575
1003.24 €
253.80 €
15.68 €
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LT3971IDD-5#PBF 540
1003.24 €
253.80 €
15.68 €
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LT3971EDD-3.3#PBF 538
1002.91 €
253.42 €
15.12 €
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LT3971EMSE#PBF 351
1002.91 €
253.42 €
15.12 €
Buy Now
LT3971EDD#PBF 260
1002.91 €
253.42 €
15.12 €
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LT3971EMSE#TRPBF 0
25002.99 €
Buy Now
LT3971EMSE-3.3#PBF 0
1002.91 €
253.42 €
15.12 €
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LT3971IMSE-3.3#PBF 0
1003.24 €
253.80 €
15.68 €
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show stock=0hide stock=0

Newark element14

ProductStockPriceBuy
LT3971EMSE-5#PBF 69
11.30 $
251.30 $
1001.30 $
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LT3971EDD#PBF 7
12.99 $
252.99 $
1002.99 $
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Mouser Electronics

ProductStockPriceBuy
LT3971IMSE#PBF 200
16.68 $
106.12 $
254.46 $
1003.79 $
Buy Now
LT3971EMSE#PBF 84
16.01 $
105.51 $
254.01 $
1003.41 $
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LT3971EMSE-5#PBF 46
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EDD-3.3#PBF 86
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EDD#PBF 71
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EDD-5#PBF 93
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EMSE-3.3#PBF 0
16.01 $
105.51 $
254.01 $
1003.41 $
Buy Now
LT3971EMSE-5#TRPBF 0
25003.51 $
Buy Now
LT3971IDD#PBF 0
2423.79 $
Buy Now
LT3971AIMSE#PBF 0
2004.15 $
Buy Now
LT3971IDD#TRPBF 0
25003.90 $
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LT3971IDD-3.3#TRPBF 0
25003.90 $
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LT3971IMSE16#PBF 0
2223.89 $
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LT3971EMSE-3.3#TRPBF 0
25003.51 $
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LT3971EDD#TRPBF 0
25003.51 $
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show stock=0hide stock=0

Quest Components

ProductStockPriceBuy
LT3971IDD#TRA1PBF 872
3824.77 $
1715.25 $
19.54 $
Buy Now

ComS.I.T.

ProductStockPriceBuy
LT3971EDD33PBF 2

element14 Asia-Pacific

ProductStockPriceBuy
LT3971EMSE#PBF 262
17.32 $
254.90 $
1004.16 $
Buy Now
LT3971EDD#PBF 392
17.32 $
254.90 $
1004.16 $
Buy Now
LT3971IMSE#PBF 159
18.13 $
255.44 $
1004.63 $
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Farnell element14

ProductStockPriceBuy
LT3971EMSE#PBF 349
14.82 GBP
104.35 GBP
252.91 GBP
502.85 GBP
1002.79 GBP
Buy Now
LT3971EMSE16#PBF 17
12.56 GBP
Buy Now
LT3971EDD#PBF 412
14.82 GBP
104.35 GBP
252.91 GBP
502.85 GBP
1002.79 GBP
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LT3971IMSE16#PBF 8
12.33 GBP
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LT3971IMSE#PBF 159
14.91 GBP
104.46 GBP
252.98 GBP
502.94 GBP
1002.90 GBP
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Chip1Stop

ProductStockPriceBuy
LT3971EMSE-5#PBF 50
503.85 $
104.51 $
17.68 $
Buy Now
LT3971EMSE#PBF 155
1003.47 $
503.57 $
16.27 $
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RS Components

ProductStockPriceBuy
LT3971EMSE#PBF 51
104.71 GBP
254.11 GBP
Buy Now
LT3971EMSE#PBF 26
15.31 GBP
104.71 GBP
254.11 GBP
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LT3971IDD#PBF 164
65.75 GBP
305.25 GBP
614.75 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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