LT3971-3.3 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3971-3.3 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 3.30 V to 3.30 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 LT3971-3.3 characteristics are a adjustable 2000 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3971-3.3 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. 3.30 V
V-OUT max. 3.30 V
V-OUT 3.300 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

LT3971-3.3 Datasheet

Link to the most up-to-date LT3971-3.3 datasheet and the product page for EVM, tools and support information.

LT3971-3.3

LT3971-3.3 Sample stock and distributor price breaks

LT3971-3.3 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 8

Chip One Stop (5)

ProductStockPriceBuy
LT3971AIMSE#PBF4
15.38 USD
Buy Now
LT3971EMSE-3.3#PBF35
15.88 USD
105.86 USD
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LT3971EMSE-5#PBF17
16.36 USD
105.62 USD
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LT3971EMSE-5#PBF181
14.41 USD
104.24 USD
503.93 USD
1003.52 USD
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LT3971EMSE#PBF123
16.31 USD
105.86 USD
503.88 USD
1003.50 USD
Buy Now

Conrad (2)

ProductStockPriceBuy
LT3971EMSE-3.3#PBF2Buy Now
LT3971IMSE#PBF4Buy Now

Digi-Key (13)

ProductStockPriceBuy
LT3971EDD-5#PBF1849
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EMSE-5#PBF1728
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EMSE#PBF1493
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EDD-3.3#PBF705
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EMSE-3.3#PBF620
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971EDD#PBF445
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3971IMSE#PBF701
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971AIMSE#PBF196
17.16 USD
254.79 USD
1004.07 USD
Buy Now
LT3971IDD-5#PBF540
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971IMSE-3.3#PBF376
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971IDD#PBF80
16.53 USD
254.37 USD
1003.72 USD
Buy Now
LT3971IMSE16#PBF62
16.68 USD
254.49 USD
1003.81 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
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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

Distrelec (5)

ProductStockPriceBuy
LT3971EDD#PBF9Buy Now
LT3971EMSE-3.3#PBF55Buy Now
LT3971EMSE-5#PBF4Buy Now
LT3971EMSE#PBF80Buy Now
LT3971IMSE-5#PBF150Buy Now

Element14 (6)

ProductStockPriceBuy
LT3971AIMSE#PBF55
111.20 USD
257.49 USD
1006.37 USD
Buy Now
LT3971EDD-3.3109
19.11 USD
257.90 USD
Buy Now
LT3971EDD-536
19.11 USD
257.90 USD
1007.56 USD
Buy Now
LT3971EDD#PBF9
19.20 USD
256.15 USD
1005.23 USD
Buy Now
LT3971EMSE#PBF343
19.20 USD
256.15 USD
1005.23 USD
Buy Now
LT3971IMSE#PBF169
110.21 USD
256.84 USD
1005.82 USD
Buy Now

Farnell Element14 (8)

ProductStockPriceBuy
LT3971AIMSE#PBF104Buy Now
LT3971EDD-3.3110Buy Now
LT3971EDD-545Buy Now
LT3971EDD#PBF9Buy Now
LT3971EMSE16#PBF17Buy Now
LT3971EMSE#PBF428Buy Now
LT3971IMSE16#PBF11Buy Now
LT3971IMSE#PBF169Buy Now

NEWARK (3)

ProductStockPriceBuy
LT3971AIMSE#PBF0
17.17 USD
254.81 USD
1004.07 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
16.55 USD
254.39 USD
1003.72 USD
Buy Now

RS Components (3)

ProductStockPriceBuy
LT3971EMSE#PBF40Buy Now
LT3971EMSE#PBF174Buy Now
LT3971IDD#PBF110Buy 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 LT3971-3.3. Optional, compare LT3971-3.3 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3991-3.3 LT3991-3.3 product overviewLT3991-3.3 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 LT3971-3.3.

V-IN max. 38 V, I-OUT 1.2 A, V-OUT min. 3.3 V, Frequency typ. 2000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025003 3.3 1.5 1.8 85.00 2.8 x 2.8 x 3
74404032033 3.3 1.5 1.5 70.00 3 x 3 x 1.5
74404041033 3.3 1.8 2.1 69.00 4 x 4 x 1.2
74404042033 3.3 2.0 2.9 55.00 4 x 4 x 1.8
74404052033 3.3 2.6 3.0 42.20 5 x 5 x 2
74404052039 3.9 2.4 2.8 50.50 5 x 5 x 2
7440420027 2.7 2.0 2.2 47.00 4.8 x 4.8 x 2
744042003 3.3 2.0 1.8 50.00 4.8 x 4.8 x 2
7440420039 3.9 1.8 1.7 60.00 4.8 x 4.8 x 2
7440430027 2.7 2.4 2.0 25.00 4.8 x 4.8 x 3
744043003 3.3 2.2 1.8 30.00 4.8 x 4.8 x 3
7440430039 3.9 1.7 1.7 50.00 4.8 x 4.8 x 3
7440450027 2.7 1.5 2.7 96.00 4.5 x 3.2 x 2.9
744045003 3.3 1.4 2.7 104.00 4.5 x 3.2 x 2.9
7440450039 3.9 1.3 2.5 112.00 4.5 x 3.2 x 2.9
744052002 2.5 2.4 2.7 20.00 5.8 x 5.8 x 2
744052003 3.0 2.2 2.4 40.00 5.8 x 5.8 x 2
7440520039 3.9 2.0 2.1 50.00 5.8 x 5.8 x 2
744053002 2.6 3.0 2.7 20.00 5.8 x 5.8 x 3
744053003 3.0 2.8 2.5 20.00 5.8 x 5.8 x 3
744053004 4.2 2.5 2.2 30.00 5.8 x 5.8 x 3
744062003 3.3 2.8 2.5 20.00 6.8 x 6.8 x 2.5
7440680027 2.7 2.2 1.9 52.00 8 x 8 x 1.2
7440680033 3.3 2.0 1.8 61.00 8 x 8 x 1.2
7440690033 3.3 2.6 2.3 42.00 8 x 8 x 1.5
7440700033 3.3 3.2 2.6 30.00 8 x 8 x 2
74408941029 2.9 1.6 3.0 101.00 4.8 x 4.8 x 2.1
74408941035 3.5 1.5 2.8 113.00 4.8 x 4.8 x 2.1
74438323033 3.3 1.3 2.1 220.00 2.5 x 2 x 1
74438324033 3.3 1.3 2.6 226.00 2.5 x 2 x 1.2
744773027 2.7 2.3 3.0 39.00 4 x 4.5 x 3.5
744773033 3.3 2.0 2.9 41.00 4 x 4.5 x 3.5
744773039 3.9 1.9 2.6 54.00 4 x 4.5 x 3.5
7447785003 3.3 2.8 3.0 43.00 5.9 x 6.2 x 3.3
78438323033 3.3 1.3 2.1 220.00 2.5 x 2 x 1
784773033 3.3 2.0 2.9 41.00 4 x 4.5 x 3.5
784773039 3.9 1.9 2.6 54.00 4 x 4.5 x 3.5
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