LT3970 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3970 is a 40.00 V sync Buck Converter from with 0.35 A output current. The maximum 40.00 V input voltage can be regulated down into a 1.21 V to 25.00 V output voltage.

It requires are a typical inductor size of 22.00 µH, a typical external component count of 8 and achieves a peak efficiency of 85 %. Further LT3970 characteristics are a adjustable 2200 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3970 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. 4.20 V
V-IN max. 40.00 V
I-OUT? 0.35 A
V-OUT min. 1.21 V
V-OUT max. 25.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 2200 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 2250 kHz
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. 3.5 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 22.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 85 %
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

LT3970 Datasheet

Link to the most up-to-date LT3970 datasheet and the product page for EVM, tools and support information.

LT3970

LT3970 Sample stock and distributor price breaks

LT3970 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 8

Chip One Stop (19)

ProductStockPriceBuy
LT3970EDDB-3.3#TRMPBF476
15.10 USD
1003.76 USD
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LT3970EDDB-3.3#TRMPBF500
10003.76 USD
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LT3970EDDB-3.3#TRPBF2500
25003.76 USD
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LT3970EDDB-5#TRMPBF500
15.10 USD
1003.76 USD
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LT3970EDDB#TRMPBF642
15.10 USD
1003.76 USD
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LT3970EDDB#TRMPBF642
15.10 USD
1003.76 USD
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LT3970EDDB#TRPBF2500
25003.76 USD
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LT3970EMS-3.3#PBF1939
15.21 USD
1003.84 USD
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LT3970EMS-5#PBF381
5003.84 USD
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LT3970EMS-5#PBF381
5003.84 USD
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LT3970EMS-5#PBF381
5003.84 USD
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LT3970EMS#PBF26
15.45 USD
103.96 USD
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LT3970EMS#PBF175
15.21 USD
1003.84 USD
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LT3970IDDB-3.3#TRMPBF266
15.66 USD
1004.17 USD
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LT3970IDDB-5#TRMPBF67
15.66 USD
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LT3970IDDB#TRMPBF47
15.66 USD
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LT3970IMS-3.3#PBF143
15.80 USD
1004.27 USD
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LT3970IMS#PBF60
15.97 USD
105.68 USD
503.77 USD
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LT3970IMS#PBF738
15.80 USD
1004.27 USD
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Conrad COM (4)

ProductStockPriceBuy
LT3970EDDB-3.3#TRMPBF99999999Buy Now
LT3970EMS-3.3#PBF99999999Buy Now
LT3970EMS-5#PBF99999999Buy Now
LT3970EMS#PBF99999999Buy Now

Digi-Key (14)

ProductStockPriceBuy
LT3970EDDB-3.3#TRMPBF3000
5002.91 USD
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LT3970EDDB-3.3#TRMPBF3205
15.86 USD
255.23 USD
1003.49 USD
2503.20 USD
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LT3970EDDB-3.3#TRMPBF3205
15.86 USD
255.23 USD
1003.49 USD
2503.20 USD
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LT3970EDDB#TRMPBF1500
5002.91 USD
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LT3970EDDB#TRMPBF1861
15.86 USD
255.23 USD
1003.49 USD
2503.20 USD
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LT3970EDDB#TRMPBF1861
15.86 USD
255.23 USD
1003.49 USD
2503.20 USD
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LT3970EMS#PBF3080
15.23 USD
253.50 USD
1002.97 USD
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LT3970EMS-5#PBF2263
15.23 USD
253.50 USD
1002.97 USD
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LT3970EMS-3.3#PBF1847
15.23 USD
253.50 USD
1002.97 USD
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LT3970IMS#PBF546
15.82 USD
253.90 USD
1003.30 USD
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LT3970IMS-3.3#PBF517
15.82 USD
253.90 USD
1003.30 USD
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LT3970HMS#PBF382
16.36 USD
254.25 USD
1003.62 USD
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LT3970IDDB#TRMPBF0
5003.23 USD
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LT3970IDDB#TRMPBF47
16.49 USD
255.79 USD
1003.88 USD
2503.56 USD
Buy Now
LT3970IDDB#TRMPBF47
16.49 USD
255.79 USD
1003.88 USD
2503.56 USD
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LT3970IDDB-3.3#TRMPBF0
5003.23 USD
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LT3970IDDB-3.3#TRMPBF0
16.49 USD
255.79 USD
1003.88 USD
2503.56 USD
Buy Now
LT3970IDDB-3.3#TRMPBF0
16.49 USD
255.79 USD
1003.88 USD
2503.56 USD
Buy Now
LT3970EMS-3.3#TRPBF0
25003.07 USD
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LT3970EMS-3.3#TRPBF0
00.00 USD
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LT3970EMS-3.3#TRPBF0
00.00 USD
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LT3970EDDB#TRPBF0
25002.91 USD
Buy Now
LT3970EDDB-3.3#TRPBF0
25002.91 USD
Buy Now
LT3970EDDB-5#TRMPBF0
5002.91 USD
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LT3970EDDB-5#TRPBF0
25002.91 USD
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Distrelec (4)

ProductStockPriceBuy
LT3970EDDB-3.3#PBF47Buy Now
LT3970EMS#PBF35Buy Now
LT3970IDDB-5#PBF63Buy Now
LT3970IMS-5#PBF542Buy Now

Element14 (4)

ProductStockPriceBuy
LT3970EDDB-3.3#PBF368
18.27 USD
255.76 USD
1004.96 USD
Buy Now
LT3970EMS-3.3#PBF454
18.22 USD
255.50 USD
1004.67 USD
Buy Now
LT3970EMS-5#PBF928
18.22 USD
255.50 USD
1004.67 USD
Buy Now
LT3970HMS#PBF142
19.99 USD
256.69 USD
1005.69 USD
Buy Now

Farnell Element14 (4)

ProductStockPriceBuy
LT3970EDDB-3.3#PBF392Buy Now
LT3970EMS-3.3#PBF515Buy Now
LT3970EMS-5#PBF1112Buy Now
LT3970HMS#PBF152Buy Now

RS Components (7)

ProductStockPriceBuy
LT3970EDDB-3.3#TRMPBF256Buy Now
LT3970EMS-3.3#PBF16Buy Now
LT3970EMS-5#PBF26Buy Now
LT3970EMS-5#PBF86Buy Now
LT3970EMS#PBF16Buy Now
LT3970EMS#PBF105Buy Now
LT3970IMS#PBF12Buy Now

Transfer Multisort Elektronik (1)

ProductStockPriceBuy
LT3970EMS#PBF50Buy Now

Available Distributors without stock: 1

Newark Electronics (0)

ProductStockPriceBuy
LT3970EDDB-3.3#PBF0
15.13 USD
253.42 USD
502.85 USD
Buy Now
LT3970EDDB-3.3#TRMPBF0
13.99 USD
5002.85 USD
Buy Now
LT3970EDDB-3.42#PBF0
15.97 USD
1004.88 USD
2504.48 USD
5004.16 USD
10003.91 USD
Buy Now
LT3970EDDB-5#PBF0
15.13 USD
253.42 USD
1002.85 USD
Buy Now
LT3970EDDB-5#TRMPBF0
13.99 USD
5002.85 USD
Buy Now
LT3970EDDB#PBF0
15.13 USD
253.42 USD
1002.85 USD
Buy Now
LT3970EDDB#TRMPBF0
13.99 USD
5002.85 USD
Buy Now
LT3970EDDB#TRPBF0
14.22 USD
25003.03 USD
Buy Now
LT3970EMS-3.3#PBF0
15.13 USD
253.44 USD
1002.91 USD
Buy Now
LT3970EMS-3.3#TRPBF0
14.98 USD
25003.57 USD
Buy Now
LT3970EMS-5#PBF0
15.13 USD
253.44 USD
1002.91 USD
Buy Now
LT3970EMS-5#TRPBF0
14.98 USD
25003.57 USD
Buy Now
LT3970EMS#PBF0
15.13 USD
253.44 USD
1002.91 USD
Buy Now
LT3970EMS#TRPBF0
14.44 USD
25003.18 USD
Buy Now
LT3970HMS#PBF0
16.25 USD
254.19 USD
1003.55 USD
Buy Now
LT3970IDDB-3.3#PBF0
15.71 USD
253.81 USD
503.17 USD
Buy Now
LT3970IDDB-5#PBF0
15.71 USD
253.81 USD
503.17 USD
Buy Now
LT3970IDDB-5#TRMPBF0
14.44 USD
5003.17 USD
Buy Now
LT3970IDDB#PBF0
15.65 USD
253.78 USD
1003.17 USD
Buy Now
LT3970IDDB#TRMPBF0
14.44 USD
5003.17 USD
Buy Now
LT3970IMS-3.3#TRPBF0
15.54 USD
25003.98 USD
Buy Now
LT3970IMS-5#TRPBF0
15.54 USD
25003.98 USD
Buy Now
LT3970IMS#PBF0
15.71 USD
253.83 USD
1003.24 USD
Buy Now
LT3970IMS#TRPBF0
14.93 USD
25003.53 USD
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Available Distributors with stock: 10

Arrow Electronics

ProductStockPriceBuy
LT3970IMS#PBF 738
13.82 $
1003.24 $
Buy Now
LT3970EDDB#TRMPBF 642
13.36 $
1002.85 $
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LT3970EDDB-3.3#TRMPBF 500
10002.85 $
Buy Now
LT3970EDDB-3.3#TRMPBF 476
13.36 $
1002.85 $
Buy Now
LT3970IDDB-3.3#TRMPBF 266
13.73 $
1003.17 $
Buy Now
LT3970IMS-3.3#PBF 138
13.82 $
1003.24 $
Buy Now
LT3970IDDB-5#TRMPBF 67
13.73 $
1003.17 $
Buy Now
LT3970IDDB#TRMPBF 47
13.73 $
1003.17 $
Buy Now
LT3970EDDB#TRMPBF 0
5002.85 $
Buy Now
LT3970IDDB-3.3#TRMPBF 0
5003.17 $
Buy Now
LT3970IDDB-5#TRMPBF 0
5003.17 $
Buy Now
LT3970IDDB-5#TRMPBF 0
5003.17 $
Buy Now
LT3970EDDB-3.3#TRMPBF 0
10002.85 $
Buy Now
LT3970IDDB#TRMPBF 0
5003.17 $
Buy Now
LT3970IDDB#TRMPBF 0
5003.17 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3970EDDB-3.3#TRMPBF 3205
2502.68 €
1002.92 €
254.38 €
14.90 €
Buy Now
LT3970EDDB-3.3#TRMPBF 3205
2502.68 €
1002.92 €
254.38 €
14.90 €
Buy Now
LT3970EMS#PBF 3080
1002.48 €
252.93 €
14.38 €
Buy Now
LT3970EDDB-3.3#TRMPBF 3000
5002.43 €
Buy Now
LT3970EMS-5#PBF 2263
1002.48 €
252.93 €
14.38 €
Buy Now
LT3970EDDB#TRMPBF 1861
2502.68 €
1002.92 €
254.38 €
14.90 €
Buy Now
LT3970EDDB#TRMPBF 1861
2502.68 €
1002.92 €
254.38 €
14.90 €
Buy Now
LT3970EMS-3.3#PBF 1847
1002.48 €
252.93 €
14.38 €
Buy Now
LT3970EDDB#TRMPBF 1500
5002.43 €
Buy Now
LT3970IMS#PBF 546
1002.77 €
253.26 €
14.87 €
Buy Now
LT3970IMS-3.3#PBF 517
1002.77 €
253.26 €
14.87 €
Buy Now
LT3970HMS#PBF 382
1003.03 €
253.56 €
15.32 €
Buy Now
LT3970IDDB#TRMPBF 47
2502.98 €
1003.25 €
254.85 €
15.43 €
Buy Now
LT3970IDDB#TRMPBF 47
2502.98 €
1003.25 €
254.85 €
15.43 €
Buy Now
LT3970IDDB#TRMPBF 0
5002.71 €
Buy Now
show stock=0hide stock=0

Mouser Electronics

ProductStockPriceBuy
LT3970EMS#PBF 500
15.24 $
104.80 $
253.50 $
1002.97 $
Buy Now
LT3970EDDB-3.3#TRMPBF 500
15.87 $
105.44 $
255.23 $
1003.49 $
2503.20 $
5002.91 $
Buy Now
LT3970EDDB#TRMPBF 500
15.87 $
105.44 $
255.23 $
1003.49 $
2503.20 $
5002.91 $
Buy Now
LT3970EMS-3.3#PBF 250
15.24 $
104.80 $
253.50 $
1002.97 $
Buy Now
LT3970IMS#PBF 250
15.83 $
105.35 $
253.90 $
1003.31 $
Buy Now
LT3970HMS#PBF 250
16.37 $
105.84 $
254.26 $
1003.63 $
Buy Now
LT3970IMS-3.3#PBF 100
15.83 $
105.35 $
253.90 $
1003.31 $
Buy Now
LT3970EMS-5#PBF 150
15.24 $
104.80 $
253.50 $
1002.97 $
Buy Now
LT3970EDDB-5#TRMPBF 0
5002.91 $
Buy Now
LT3970IDDB#TRMPBF 0
5003.24 $
Buy Now
LT3970IDDB#TRPBF 0
25003.24 $
Buy Now
LT3970EDDB#TRPBF 0
25002.91 $
Buy Now
LT3970IMS-5#TRPBF 0
25003.41 $
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LT3970IDDB-3.3#TRPBF 0
25003.24 $
Buy Now
LT3970IMS#TRPBF 0
25003.40 $
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show stock=0hide stock=0

Quest Components

ProductStockPriceBuy
LT3970EMS#PBF 2
34.40 $
16.60 $
Buy Now

element14 Asia-Pacific

ProductStockPriceBuy
LT3970EDDB-3.3#PBF 368
16.62 $
254.61 $
1003.96 $
Buy Now
LT3970EMS-3.3#PBF 454
16.58 $
254.40 $
1003.73 $
Buy Now
LT3970EMS-5#PBF 928
16.58 $
254.40 $
1003.73 $
Buy Now
LT3970HMS#PBF 142
17.99 $
255.35 $
1004.55 $
Buy Now

Farnell element14

ProductStockPriceBuy
LT3970EDDB-3.3#PBF 392
14.64 GBP
253.29 GBP
1002.32 GBP
Buy Now
LT3970EMS-3.3#PBF 515
14.40 GBP
252.65 GBP
1002.37 GBP
Buy Now
LT3970EMS-5#PBF 1112
14.40 GBP
252.65 GBP
1002.37 GBP
Buy Now
LT3970HMS#PBF 152
15.23 GBP
253.01 GBP
1002.75 GBP
Buy Now

TME Electronic Components

ProductStockPriceBuy
LT3970EMS#PBF 50
17.00 $
36.46 $
105.70 $
254.94 $
Buy Now
LT3970EMS#PBF 50
17.00 $
36.46 $
105.70 $
254.94 $
Buy Now

Chip1Stop

ProductStockPriceBuy
LT3970EMS-3.3#PBF 1346
15.21 $
1003.84 $
Buy Now
LT3970EDDB#TRMPBF 642
15.10 $
1003.76 $
Buy Now
LT3970IDDB-3.3#TRMPBF 266
15.66 $
1004.17 $
Buy Now
LT3970IDDB#TRMPBF 97
15.66 $
Buy Now
LT3970IMS#PBF 60
15.97 $
105.68 $
503.77 $
Buy Now
LT3970IMS#PBF 738
15.80 $
1004.27 $
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LT3970IMS-3.3#PBF 138
15.80 $
1004.27 $
Buy Now
LT3970EDDB-3.3#TRPBF 2500
25003.76 $
Buy Now
LT3970EDDB-5#TRMPBF 500
15.10 $
1003.76 $
Buy Now
LT3970EMS#PBF 26
15.45 $
103.96 $
Buy Now
LT3970IDDB-5#TRMPBF 72
15.66 $
Buy Now
LT3970EDDB-3.3#TRMPBF 476
15.10 $
1003.76 $
Buy Now

New Advantage Corporation

ProductStockPriceBuy
LT3970EMS#PBF 500
503.65 $
Buy Now

RS Components

ProductStockPriceBuy
LT3970EMS-3.3#PBF 16
103.69 GBP
203.64 GBP
303.59 GBP
503.55 GBP
Buy Now
LT3970IMS#PBF 12
104.67 GBP
254.18 GBP
503.94 GBP
753.88 GBP
Buy Now
LT3970EMS#PBF 105
104.58 GBP
254.09 GBP
Buy Now
LT3970EMS#PBF 16
15.09 GBP
104.58 GBP
254.09 GBP
Buy Now
LT3970EMS-5#PBF 86
103.71 GBP
203.66 GBP
303.62 GBP
503.57 GBP
Buy Now
LT3970EMS-5#PBF 26
23.78 GBP
103.71 GBP
203.66 GBP
303.62 GBP
503.57 GBP
Buy Now
LT3970EDDB-3.3#TRMPBF 256
103.69 GBP
203.64 GBP
303.59 GBP
503.55 GBP
Buy Now

Available Distributors without stock: 1

Newark element14

ProductStockPriceBuy
LT3970EDDB-3.3#PBF 0
15.13 $
253.42 $
502.85 $
Buy Now
LT3970EMS-3.3#PBF 0
15.13 $
253.44 $
1002.91 $
Buy Now
LT3970EDDB#PBF 0
15.13 $
253.42 $
1002.85 $
Buy Now
LT3970EDDB-3.42#PBF 0
15.97 $
1004.88 $
2504.48 $
5004.16 $
10003.91 $
Buy Now
LT3970IDDB-3.3#PBF 0
15.71 $
253.81 $
503.17 $
Buy Now
LT3970IMS-3.3#TRPBF 0
15.54 $
25003.98 $
Buy Now
LT3970EDDB#TRMPBF 0
13.99 $
5002.85 $
Buy Now
LT3970EDDB-5#PBF 0
15.13 $
253.42 $
1002.85 $
Buy Now
LT3970EMS#TRPBF 0
14.44 $
25003.18 $
Buy Now
LT3970IMS-5#TRPBF 0
15.54 $
25003.98 $
Buy Now
LT3970EDDB#TRPBF 0
14.22 $
25003.03 $
Buy Now
LT3970IDDB#TRMPBF 0
14.44 $
5003.17 $
Buy Now
LT3970IDDB#PBF 0
15.65 $
253.78 $
1003.17 $
Buy Now
LT3970IDDB-5#PBF 0
15.71 $
253.81 $
503.17 $
Buy Now
LT3970IMS#PBF 0
15.71 $
253.83 $
1003.24 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3970. Optional, compare LT3970 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3990 LT3990 product overviewLT3990 product overview Linear Technology DFN-10, MSOP-16
0% LM46000 LM46000 product overviewLM46000 product overview Texas Instruments HTSSOP-16
0% LM46000-Q1 LM46000-Q1 product overviewLM46000-Q1 product overview Texas Instruments HTSSOP-16
10% LM43600 LM43600 product overviewLM43600 product overview Texas Instruments HTSSOP-16
10% LM43600-Q1 LM43600-Q1 product overviewLM43600-Q1 product overview Texas Instruments HTSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3970.

V-IN max. 40 V, I-OUT 0.35 A, V-OUT min. 1.21 V, Frequency typ. 2200 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744028004 4.7 0.9 0.7 265.00 2.8 x 2.8 x 1.2
744029004 4.7 1.0 0.8 170.00 2.8 x 2.8 x 1.5
744030004 4.7 0.5 0.5 252.00 3.3 x 3.5 x 1.05
744031004 4.7 1.2 0.9 90.00 3.8 x 3.8 x 1.8
74479888247 4.7 1.0 0.7 380.00 2.5 x 2 x 1
74479889247 4.7 0.9 0.9 400.00 2.5 x 2 x 1.2
0Results
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10% tolerance (0)
25% tolerance (0)
50% tolerance (0)
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Last Tweets
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