LT3973-5.0 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3973-5.0 is a 42.00 V sync Buck Converter from with 0.75 A output current. The maximum 42.00 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 15.00 µH, a typical external component count of 6 and achieves a peak efficiency of 88 %. Further LT3973-5.0 characteristics are a adjustable 800 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3973-5.0 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. 4.20 V
V-IN max. 42.00 V
I-OUT? 0.75 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 sync
Frequency typ. 800 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min. 195 kHz
Frequency adj./ ext.clock max 2150 kHz
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. 6 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 15.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 88 %
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

LT3973-5.0 Datasheet

Link to the most up-to-date LT3973-5.0 datasheet and the product page for EVM, tools and support information.

LT3973-5.0

LT3973-5.0 Sample stock and distributor price breaks

LT3973-5.0 prices and online available distributors.

OEMSecrets.com
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Available Distributors with stock: 6

Chip One Stop (24)

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LT3973EDD-3.3#PBF612
14.05 USD
1003.34 USD
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14.03 USD
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25003.85 USD
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16.25 USD
105.53 USD
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14.03 USD
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LT3973EDD-5#PBF968
14.03 USD
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LT3973EDD-5#PBF80
16.25 USD
105.53 USD
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LT3973EDD-5#PBF968
14.03 USD
1003.34 USD
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LT3973EDD-5#PBF968
14.03 USD
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LT3973EDD#PBF1235
15.97 USD
1004.40 USD
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15.97 USD
1004.40 USD
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14.16 USD
1003.46 USD
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16.18 USD
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16.18 USD
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25003.98 USD
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LT3973IDD-3.3#PBF516
15.82 USD
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15.82 USD
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15.82 USD
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15.82 USD
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LT3973IMSE-3.3#PBF45
16.04 USD
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16.04 USD
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LT3973IMSE-5#PBF307
14.49 USD
1003.81 USD
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LT3973IMSE-5#PBF307
14.49 USD
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Digi-Key (20)

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LT3973EDD#PBF1376
16.00 USD
254.01 USD
1003.41 USD
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LT3973EDD-3.3#PBF1157
16.00 USD
254.01 USD
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16.20 USD
254.15 USD
1003.53 USD
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LT3973IMSE-5#PBF644
16.82 USD
254.58 USD
1003.89 USD
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16.00 USD
254.01 USD
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16.20 USD
254.15 USD
1003.53 USD
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LT3973EMSE-3.3#PBF427
16.20 USD
254.15 USD
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LT3973IDD#PBF541
16.59 USD
254.42 USD
1003.75 USD
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16.59 USD
254.42 USD
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16.82 USD
254.58 USD
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16.59 USD
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LT3973HDD-3.3#PBF360
17.36 USD
254.93 USD
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17.36 USD
254.93 USD
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17.59 USD
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176.50 USD
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1127.50 USD
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16.82 USD
254.58 USD
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1102.00 USD
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LT3973HMSE#PBF15
17.59 USD
255.09 USD
1004.32 USD
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LT3973EDD#TRPBF0
25003.51 USD
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LT3973EDD-5#TRPBF0
25003.51 USD
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LT3973EDD-3.3#TRPBF0
25003.51 USD
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25003.63 USD
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LT3973EMSE-3.3#TRPBF0
25003.63 USD
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Distrelec (1)

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LT3973IMSE-5#PBF109Buy Now

Element14 (4)

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LT3973EDD-3.3#PBF3
19.43 USD
256.30 USD
1005.36 USD
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LT3973EDD-5#PBF6
19.43 USD
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LT3973EMSE-3.3#PBF94
19.75 USD
256.53 USD
1005.55 USD
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LT3973EMSE#PBF0
19.75 USD
256.53 USD
1005.55 USD
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LT3973IDD-3.3#PBF11
110.36 USD
256.94 USD
1005.90 USD
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Farnell Element14 (6)

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RS Components (2)

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LT3973EMSE#PBF22Buy Now
LT3973EMSE#PBF34Buy Now

Available Distributors without stock: 1

Newark Electronics (0)

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LT3973EDD-3.3#PBF0
15.88 USD
253.95 USD
1003.34 USD
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LT3973EDD-5#PBF0
15.88 USD
253.95 USD
1003.34 USD
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LT3973EDD#PBF0
15.88 USD
253.95 USD
1003.34 USD
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LT3973EMSE#PBF0
16.09 USD
254.09 USD
1003.46 USD
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LT3973EMSE#TRPBF0
15.91 USD
25004.24 USD
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LT3973HDD-3.3#TRPBF0
17.01 USD
25005.03 USD
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17.01 USD
25005.03 USD
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LT3973IDD-3.3#PBF0
16.48 USD
254.35 USD
1003.68 USD
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LT3973IDD#PBF0
16.48 USD
254.35 USD
1003.68 USD
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LT3973IMSE-5#PBF0
16.71 USD
254.50 USD
1003.81 USD
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LT3973IMSE#TRPBF0
16.51 USD
25004.67 USD
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Available Distributors with stock: 7

Arrow Electronics

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LT3973IMSE-3.3#TRPBF 2500
1003.91 $
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LT3973EDD#PBF 1235
13.93 $
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14.07 $
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LT3973EMSE#PBF 300
14.07 $
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LT3973IDD-3.3#PBF 241
14.33 $
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14.49 $
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14.33 $
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LT3973HMSE-3.3#PBF 50
14.99 $
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LT3973EMSE#PBF 45
14.07 $
1003.46 $
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14.49 $
1003.81 $
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LT3973EDD-5#PBF 17
13.93 $
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LT3973HMSE-3.3#PBF 0
14.99 $
1004.24 $
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14.07 $
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LT3973EDD#PBF 0
13.93 $
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show stock=0hide stock=0

Digi-Key

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LT3973EDD#PBF 1376
1002.85 €
253.35 €
15.02 €
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LT3973EDD-3.3#PBF 1157
1002.85 €
253.35 €
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1002.95 €
253.47 €
15.19 €
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LT3973IMSE-5#PBF 644
1003.25 €
253.83 €
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1002.95 €
253.47 €
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LT3973IDD#PBF 541
1003.14 €
253.70 €
15.52 €
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LT3973IDD-3.3#PBF 527
1003.14 €
253.70 €
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LT3973EMSE-3.3#PBF 427
1002.95 €
253.47 €
15.19 €
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LT3973HDD-3.3#PBF 360
1003.50 €
254.12 €
16.16 €
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LT3973HMSE-5#PBF 283
1003.62 €
254.26 €
16.35 €
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LT3973EDD-5#PBF 269
1002.85 €
253.35 €
15.02 €
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LT3973HDD-5#PBF 197
1003.50 €
254.12 €
16.16 €
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LT3973IMSE#PBF 181
1003.25 €
253.83 €
15.71 €
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LT3973HMSE-3.3#PBF 165
1003.62 €
254.26 €
16.35 €
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LT3973IDD-5#PBF 159
1003.14 €
253.70 €
15.52 €
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Mouser Electronics

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LT3973EDD-5#PBF 217
16.01 $
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16.22 $
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LT3973EMSE-3.3#PBF 100
16.22 $
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LT3973EDD#PBF 0
16.01 $
105.51 $
254.01 $
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2003.89 $
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2423.41 $
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2424.19 $
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25004.29 $
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show stock=0hide stock=0

element14 Asia-Pacific

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LT3973EMSE#PBF 0
17.80 $
255.22 $
1004.44 $
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17.80 $
255.22 $
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18.29 $
255.55 $
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LT3973EMSE-3.3#PBF 94
17.80 $
255.22 $
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LT3973EDD-5#PBF 6
17.54 $
255.04 $
1004.28 $
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LT3973EDD-3.3#PBF 3
17.54 $
255.04 $
1004.28 $
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show stock=0hide stock=0

Farnell element14

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LT3973EMSE#PBF 73
15.17 GBP
253.14 GBP
1002.82 GBP
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LT3973EMSE-5#PBF 36
15.11 GBP
253.10 GBP
1002.82 GBP
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LT3973IDD-3.3#PBF 11
15.42 GBP
253.29 GBP
1003.00 GBP
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LT3973EMSE-3.3#PBF 94
15.11 GBP
253.10 GBP
1002.82 GBP
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LT3973EDD-5#PBF 6
14.94 GBP
252.99 GBP
1002.72 GBP
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LT3973IDD-5#PBF 0
15.42 GBP
253.29 GBP
1003.00 GBP
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LT3973EDD-3.3#PBF 3
14.69 GBP
252.84 GBP
1002.58 GBP
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Chip1Stop

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14.16 $
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14.03 $
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16.25 $
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16.04 $
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14.49 $
1003.81 $
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14.05 $
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RS Components

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LT3973EMSE#PBF 22
15.24 GBP
104.97 GBP
254.45 GBP
504.24 GBP
754.16 GBP
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LT3973EMSE#PBF 34
104.97 GBP
254.45 GBP
504.24 GBP
754.16 GBP
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Available Distributors without stock: 1

Newark element14

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LT3973HDD#TRPBF 0
17.01 $
25005.03 $
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LT3973EDD#PBF 0
15.88 $
253.95 $
1003.34 $
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16.09 $
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16.51 $
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15.91 $
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LT3973IDD-3.3#PBF 0
16.48 $
254.35 $
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15.88 $
253.95 $
1003.34 $
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LT3973IMSE-5#PBF 0
16.71 $
254.50 $
1003.81 $
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LT3973HDD-3.3#TRPBF 0
17.01 $
25005.03 $
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LT3973EDD-3.3#PBF 0
15.88 $
253.95 $
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LT3973IDD#PBF 0
16.48 $
254.35 $
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List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3973-5.0. Optional, compare LT3973-5.0 side-by-side with other Buck Converter via the Comparison function.

no alternatives found

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3973-5.0.

V-IN max. 42 V, I-OUT 0.75 A, V-OUT min. 5 V, Frequency typ. 800 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404042150 15.0 0.9 1.2 210.00 4 x 4 x 1.8
74404052220 22.0 1.2 1.4 225.00 5 x 5 x 2
74404054220 22.0 1.5 1.7 129.00 5 x 5 x 4
74404063220 22.0 1.4 1.6 140.00 6 x 6 x 2.8
744052150 15.0 1.0 1.1 175.00 5.8 x 5.8 x 2
744052180 18.0 0.9 1.0 185.00 5.8 x 5.8 x 2
744052220 22.0 0.8 0.9 240.00 5.8 x 5.8 x 2
744053150 15.0 1.4 1.2 80.00 5.8 x 5.8 x 3
744053180 18.0 1.3 1.1 90.00 5.8 x 5.8 x 3
744053220 22.0 1.2 0.9 100.00 5.8 x 5.8 x 3
744062150 15.0 1.3 1.1 80.00 6.8 x 6.8 x 2.5
744062180 18.0 1.3 1.0 90.00 6.8 x 6.8 x 2.5
744062220 22.0 1.2 1.0 100.00 6.8 x 6.8 x 2.5
7440690150 15.0 1.3 1.1 179.00 8 x 8 x 1.5
7440690180 18.0 1.1 1.1 225.00 8 x 8 x 1.5
7440690220 22.0 1.0 0.9 272.00 8 x 8 x 1.5
7440700150 15.0 1.7 1.3 117.00 8 x 8 x 2
7440700180 18.0 1.5 1.1 135.00 8 x 8 x 2
7440700220 22.0 1.3 1.0 166.00 8 x 8 x 2
74408941150 15.0 0.8 1.4 430.00 4.8 x 4.8 x 2.1
74408942150 15.0 1.1 1.6 207.00 4.8 x 4.8 x 3.1
74408942220 22.0 0.9 1.3 300.00 4.8 x 4.8 x 3.1
74408943150 15.0 1.4 1.7 118.00 4.8 x 4.8 x 4.1
74408943220 22.0 1.1 1.4 185.00 4.8 x 4.8 x 4.1
7447462220 22.0 1.8 1.7 102.00 5.5 x 5.5 x 8.5
744773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
744773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
744773122 22.0 1.0 1.2 261.00 4 x 4.5 x 3.5
744777122 22.0 1.4 1.7 90.00 7.3 x 7.3 x 4.5
7447779122 22.0 1.4 1.7 90.00 7.3 x 7.3 x 4.5
744778115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.4
744778118 18.0 1.4 1.7 114.00 7.3 x 7.3 x 3.4
744778122 22.0 1.4 1.4 119.00 7.3 x 7.3 x 3.4
7447785115 15.0 1.6 1.4 165.00 5.9 x 6.2 x 3.3
7447785122 22.0 1.4 1.1 210.00 5.9 x 6.2 x 3.3
7447786122 22.0 2.0 1.3 98.00 5.9 x 6.2 x 5.1
7447789115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.5
7447789118 18.0 1.4 1.7 114.00 7.3 x 7.3 x 3.5
7447789122 22.0 1.4 1.4 119.00 7.3 x 7.3 x 3.5
744787220 22.0 1.8 1.7 88.00 7.8 x 7 x 5
784773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
784773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
784773122 22.0 1.0 1.2 261.00 4 x 4.5 x 3.5
784774118 18.0 1.5 1.7 104.00 5.2 x 5.8 x 4.85
784774122 22.0 1.3 1.5 109.00 5.2 x 5.8 x 4.85
784777220 22.0 1.4 1.8 180.00 7.3 x 7.3 x 4.3
784778220 22.0 1.6 1.6 156.00 7.3 x 7.3 x 3.5
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