LM2673 Buck Converter overview

Description

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LM2673 is a 40.00 V non-sync Buck Converter from with 3.00 A output current. The maximum 40.00 V input voltage can be regulated down into a 1.21 V to 37.00 V output voltage.

It requires are a typical inductor size of 33.00 µH, a typical external component count of 11 and achieves a peak efficiency of 94 %. Further LM2673 characteristics are a fixed 260 kHz switching frequency and 3 available package option(s): VSON-14 TO-220-7 DDPAK-7 .

For the LM2673 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. 8.00 V
V-IN max. 40.00 V
I-OUT? 3.00 A
V-OUT min. 1.21 V
V-OUT max. 37.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 260 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK no
Quiescent current max. 6000 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 33.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 94 %
Component count min. 11
current limit adjustable yes
Nr.of packages 3
CSP
SC70
SOT
MSOP
QFN/DFN VSON-14
SO/SOIC
SOP
DIP
TO TO-220-7
DDPAK DDPAK-7

LM2673 Datasheet

Link to the most up-to-date LM2673 datasheet and the product page for EVM, tools and support information.

LM2673

LM2673 Sample stock and distributor price breaks

LM2673 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LM2673 stock available

Available Distributors with stock: 0

no online Distributor with LM2673 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LM2673. Optional, compare LM2673 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LM22673 LM22673 product overviewLM22673 product overview Texas Instruments TO263-7, SO-8
0% LM22679 LM22679 product overviewLM22679 product overview Texas Instruments TO263-7
0% LM2679 LM2679 product overviewLM2679 product overview Texas Instruments DDPAK-7, TO-220-7, VSON-14

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LM2673.

V-IN max. 40 V, I-OUT 3 A, V-OUT min. 1.21 V, Frequency typ. 260 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404054033 3.3 3.4 4.3 24.00 5 x 5 x 4
74404054047 4.7 3.0 3.8 30.00 5 x 5 x 4
74404063033 3.3 3.5 4.5 25.00 6 x 6 x 2.8
74404064033 3.3 3.7 6.5 21.00 6 x 6 x 4.5
74404064047 4.7 3.3 5.5 26.00 6 x 6 x 4.5
74404084033 3.3 4.4 7.1 17.00 8 x 8 x 4.2
74404084047 4.7 4.1 6.5 19.00 8 x 8 x 4.2
7440650033 3.3 5.3 4.7 15.00 10 x 10 x 3.1
7440650047 4.7 4.6 4.2 16.50 10 x 10 x 3.1
7440660035 3.5 5.8 6.4 11.50 10 x 10 x 4.1
744066005 5.0 4.9 5.5 14.50 10 x 10 x 4.1
744071039 3.9 4.9 4.5 13.00 8 x 8 x 4.6
744071047 4.7 4.8 4.3 17.00 8 x 8 x 4.6
744071056 5.6 4.0 4.0 20.00 8 x 8 x 4.6
744311470 4.7 6.0 7.0 19.50 7 x 6.9 x 4
744314490 4.9 6.5 6.5 14.50 7 x 6.9 x 5
744316330 3.3 5.8 5.8 18.50 5.5 x 5.3 x 4.3
744316470 4.7 4.6 4.7 24.50 5.5 x 5.3 x 4.3
744316560 5.6 4.5 4.6 28.50 5.5 x 5.3 x 4.3
74437336047 4.7 3.5 7.0 50.00 5.7 x 5.2 x 3
74437336056 5.6 3.0 6.0 55.00 5.7 x 5.2 x 3
74438356033 3.3 3.6 5.5 39.90 4.1 x 4.1 x 2.1
7447462033 3.3 4.7 4.0 16.00 5.5 x 5.5 x 8.5
7447462047 4.7 4.2 3.7 19.00 5.5 x 5.5 x 8.5
7447471047 4.7 6.9 6.0 10.50 10.5 x 10.5 x 11.5
7447713033 3.3 4.6 7.2 20.40 10 x 10 x 3
7447713047 4.7 4.0 6.0 26.00 10 x 10 x 3
7447714056 5.6 6.0 7.2 12.00 10 x 10 x 5
7447715003 3.3 5.9 7.1 11.50 12 x 12 x 4.5
7447715004 4.7 5.2 6.3 13.50 12 x 12 x 4.5
744772033 3.3 5.0 6.3 9.50 7.8 x 7.8 x 10
744772047 4.7 4.0 5.4 11.60 7.8 x 7.8 x 10
744777003 3.3 3.5 4.6 25.00 7.3 x 7.3 x 4.5
744777004 4.7 3.2 4.0 25.00 7.3 x 7.3 x 4.5
7447779003 3.3 3.3 4.5 26.00 7.3 x 7.3 x 4.5
7447779004 4.7 3.2 4.4 28.00 7.3 x 7.3 x 4.5
744778003 3.3 3.1 4.1 24.00 7.3 x 7.3 x 3.4
7447789003 3.3 3.4 4.2 24.00 7.3 x 7.3 x 3.5
744787039 3.9 3.8 4.0 16.70 7.8 x 7 x 5
744787047 4.7 3.3 3.6 24.30 7.8 x 7 x 5
784774047 4.7 3.0 5.5 56.00 5.2 x 5.8 x 4.85
784775033 3.3 4.9 4.9 12.00 7 x 7.8 x 5.5
784775047 4.7 4.5 4.5 16.00 7 x 7.8 x 5.5
784775056 5.6 4.0 4.0 18.00 7 x 7.8 x 5.5
784776033 3.3 6.0 7.0 9.00 9 x 10 x 5.9
784776047 4.7 5.0 6.0 12.00 9 x 10 x 5.9
784776056 5.6 4.8 5.5 15.00 9 x 10 x 5.9
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