LM43603-Q1 Buck Converter overview

Description

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LM43603-Q1 is a 36.00 V sync Buck Converter from with 3.00 A output current. The maximum 36.00 V input voltage can be regulated down into a 1.00 V to 28.00 V output voltage.

It requires are a typical inductor size of 6.80 µH, a typical external component count of 9 and achieves a peak efficiency of 95 %. Further LM43603-Q1 characteristics are a adjustable 500 kHz switching frequency and 1 available package option(s): HTSSOP-16 .

For the LM43603-Q1 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. 3.50 V
V-IN max. 36.00 V
I-OUT? 3.00 A
V-OUT min. 1.00 V
V-OUT max. 28.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 500 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 2200 kHz
Softstart yes
Softstart adjustable yes
Tracking yes
PG/Power OK yes
Quiescent current max. 11 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 160 °C
Inductor size typ. 6.80 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 yes
Light-Load-Mode yes
Topology Buck
Peak Efficiency 95 %
Component count min. 9
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP HTSSOP-16
DIP
TO
DDPAK

LM43603-Q1 Datasheet

Link to the most up-to-date LM43603-Q1 datasheet and the product page for EVM, tools and support information.

LM43603-Q1

LM43603-Q1 Sample stock and distributor price breaks

LM43603-Q1 prices and online available distributors.

OEMSecrets.com
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Available Distributors with stock: 0

no online Distributor with LM43603 stock available

Available Distributors with stock: 0

no online Distributor with LM43603 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LM43603-Q1. Optional, compare LM43603-Q1 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
50% LM43602-Q1 LM43602-Q1 product overviewLM43602-Q1 product overview Texas Instruments HTSSOP-16
50% LM46002-Q1 LM46002-Q1 product overviewLM46002-Q1 product overview Texas Instruments HTSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LM43603-Q1.

V-IN max. 36 V, I-OUT 3 A, V-OUT min. 1 V, Frequency typ. 500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404052015 1.5 3.3 4.9 25.70 5 x 5 x 2
74404052022 2.2 3.0 3.6 31.60 5 x 5 x 2
74404054015 1.5 4.3 6.9 15.00 5 x 5 x 4
74404054022 2.2 3.8 5.3 19.00 5 x 5 x 4
74404063015 1.5 4.6 6.6 13.00 6 x 6 x 2.8
74404063022 2.2 3.8 5.6 20.00 6 x 6 x 2.8
7440620015 1.5 4.3 4.0 10.00 6.8 x 6.8 x 2.5
7440650022 2.2 6.2 5.9 11.00 10 x 10 x 3.1
7440660022 2.2 6.7 6.8 7.70 10 x 10 x 4.1
744071022 2.2 5.4 6.3 10.00 8 x 8 x 4.6
74408943022 2.2 3.0 4.6 26.00 4.8 x 4.8 x 4.1
74437321015 1.5 3.0 4.0 55.00 4.45 x 4.06 x 1.2
74437324022 2.2 3.3 6.5 51.00 4.45 x 4.06 x 2
74438336015 1.5 3.7 4.5 33.00 3 x 3 x 2
74438356018 1.8 4.6 6.5 24.50 4.1 x 4.1 x 2.1
74438356022 2.2 4.7 6.2 29.00 4.1 x 4.1 x 2.1
7447462022 2.2 6.3 4.3 10.00 5.5 x 5.5 x 8.5
744777002 2.2 6.0 6.5 13.00 7.3 x 7.3 x 4.5
7447779002 2.2 4.2 6.0 16.00 7.3 x 7.3 x 4.5
744778002 2.2 4.0 4.8 14.00 7.3 x 7.3 x 3.4
7447786002 2.2 3.5 4.0 40.00 5.9 x 6.2 x 5.1
7447789002 2.2 4.0 4.8 19.00 7.3 x 7.3 x 3.5
744787027 2.7 4.4 4.5 13.50 7.8 x 7 x 5
784775022 2.2 6.0 6.0 8.00 7 x 7.8 x 5.5
784778022 2.2 3.1 5.0 42.00 7.3 x 7.3 x 3.5
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