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: 7

ARROW-NAC (2)

ProductStockPriceBuy
LT3971AIMSE#PBF4
14.79 USD
1004.07 USD
Buy Now
LT3971EDD-3.3#PBF5
13.93 USD
1003.34 USD
Buy Now

Chip-One-Stop (10)

ProductStockPriceBuy
LT3971AIMSE#PBF5
14.74 USD
Buy Now
LT3971EDD-5#PBF121
16.00 USD
105.05 USD
254.99 USD
504.76 USD
1004.65 USD
Buy Now
LT3971EDD#PBF182
16.00 USD
105.05 USD
254.99 USD
504.76 USD
1004.65 USD
Buy Now
LT3971EMSE-3.3#PBF50
15.02 USD
103.54 USD
503.41 USD
Buy Now
LT3971EMSE-3.3#PBF840
16.38 USD
105.37 USD
255.31 USD
505.06 USD
1004.94 USD
2004.71 USD
Buy Now
LT3971EMSE-5#PBF28
15.02 USD
103.54 USD
Buy Now
LT3971EMSE-5#PBF838
13.89 USD
103.23 USD
503.01 USD
1002.97 USD
Buy Now
LT3971EMSE#PBF113
15.27 USD
103.72 USD
503.59 USD
1003.52 USD
Buy Now
LT3971EMSE#PBF650
16.22 USD
105.23 USD
255.17 USD
504.93 USD
1004.81 USD
2004.59 USD
Buy Now
LT3971IDD#PBF86
16.67 USD
105.61 USD
255.55 USD
505.29 USD
Buy Now

DIGI-KEY (11)

ProductStockPriceBuy
LT3971EMSE-5#PBF3098
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EMSE#PBF1503
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EDD-3.3#PBF840
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EMSE-3.3#PBF418
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EDD-5#PBF489
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971AIMSE#PBF320
17.16 USD
254.79 USD
1004.07 USD
Buy Now
LT3971IDD-5#PBF570
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971IMSE-3.3#PBF469
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971IDD#PBF203
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971IMSE16#PBF247
16.68 USD
254.49 USD
1003.81 USD
Buy Now
LT3971EDD#PBF0
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971IMSE#PBF0
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971EMSE16#PBF15
16.08 USD
254.07 USD
1003.46 USD
Buy Now
LT3971EDD#TRPBF0
25003.44 USD
Buy Now
LT3971EMSE#TRPBF0
25003.44 USD
Buy Now
LT3971EMSE-3.3#TRPBF0
25003.44 USD
Buy Now
LT3971EMSE-5#TRPBF0
25003.44 USD
Buy Now
LT3971EDD-3.3#TRPBF0
25003.44 USD
Buy Now
LT3971EDD-5#TRPBF0
25003.44 USD
Buy Now
LT3971EMSE16#TRPBF0
25003.56 USD
Buy Now
LT3971IMSE-5#PBF0
2003.72 USD
Buy Now
LT3971IDD-3.3#PBF0
4843.72 USD
Buy Now
LT3971IDD#TRPBF0
25003.82 USD
Buy Now
LT3971IMSE#TRPBF0
25003.82 USD
Buy Now
LT3971IMSE-3.3#TRPBF0
25003.82 USD
Buy Now

Element14 (7)

ProductStockPriceBuy
LT3971AIMSE#PBF0
111.45 USD
257.66 USD
1006.51 USD
Buy Now
LT3971EDD-3.39
19.31 USD
256.48 USD
Buy Now
LT3971EDD-574
19.31 USD
256.48 USD
1006.30 USD
Buy Now
LT3971EDD#PBF255
19.40 USD
256.28 USD
1005.34 USD
Buy Now
LT3971EMSE16#PBF17
19.72 USD
256.51 USD
1005.53 USD
Buy Now
LT3971EMSE#PBF27
19.40 USD
256.28 USD
1005.34 USD
Buy Now
LT3971IMSE16#PBF7
110.68 USD
257.18 USD
1006.09 USD
Buy Now
LT3971IMSE#PBF35
110.44 USD
256.99 USD
1005.95 USD
Buy Now

FARNELL-ELEMENT14 (7)

ProductStockPriceBuy
LT3971EDD-3.39Buy Now
LT3971EDD-594Buy Now
LT3971EDD#PBF255Buy Now
LT3971EMSE16#PBF17Buy Now
LT3971EMSE#PBF27Buy Now
LT3971IMSE16#PBF7Buy Now
LT3971IMSE#PBF35Buy Now

NEWARK (3)

ProductStockPriceBuy
LT3971AIMSE#PBF0
14.24 USD
Buy Now
LT3971EDD-3.3#PBF0
15.88 USD
253.95 USD
1003.34 USD
Buy Now
LT3971EDD-3.3#TRPBF0
15.70 USD
25004.09 USD
Buy Now
LT3971EDD-5#PBF0
15.88 USD
253.95 USD
1003.34 USD
Buy Now
LT3971EDD#PBF13
13.34 USD
253.34 USD
1003.34 USD
Buy Now
LT3971EDD#TRPBF0
15.70 USD
25004.09 USD
Buy Now
LT3971EMSE-3.3#PBF0
15.88 USD
253.95 USD
1003.34 USD
Buy Now
LT3971EMSE-5#PBF69
13.34 USD
253.34 USD
1003.34 USD
Buy Now
LT3971EMSE#PBF0
15.88 USD
253.95 USD
1003.34 USD
Buy Now
LT3971EMSE#TRPBF0
15.70 USD
25004.09 USD
Buy Now
LT3971IMSE#PBF5
13.87 USD
Buy Now

RS-COMPONENTS (2)

ProductStockPriceBuy
LT3971EMSE#PBF73Buy Now
LT3971IDD#PBF115Buy Now

Available Distributors with stock: 0

no online Distributor with LT3971 stock available

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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