LTC3631 Buck Converter overview

Description

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LTC3631 is a 45.00 V sync Buck Converter from with 0.10 A output current. The maximum 45.00 V input voltage can be regulated down into a 0.80 V to 45.00 V output voltage.

It requires are a typical inductor size of 100.00 µH, a typical external component count of 6 and achieves a peak efficiency of 89 %. Further LTC3631 characteristics are a fixed 40 kHz switching frequency and 2 available package option(s): MSOP-8 DFN-8 .

For the LTC3631 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. 4.50 V
V-IN max. 45.00 V
I-OUT? 0.10 A
V-OUT min. 0.80 V
V-OUT max. 45.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 40 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. 220 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 180 °C
Inductor size typ. 100.00 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 yes
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-8
QFN/DFN DFN-8
SO/SOIC
SOP
DIP
TO
DDPAK

LTC3631 Datasheet

Link to the most up-to-date LTC3631 datasheet and the product page for EVM, tools and support information.

LTC3631

LTC3631 Sample stock and distributor price breaks

LTC3631 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LTC3631 stock available

Available Distributors with stock: 0

no online Distributor with LTC3631 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3631. Optional, compare LTC3631 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
50% LTC3642 LTC3642 product overviewLTC3642 product overview Linear Technology DFN-8, MSOP-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3631.

V-IN max. 45 V, I-OUT 0.1 A, V-OUT min. 0.8 V, Frequency typ. 40 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744043471 470.0 0.2 0.1 2,128.00 4.8 x 4.8 x 3
744045471 470.0 0.1 0.2 11,360.00 4.5 x 3.2 x 2.9
744052471 470.0 0.1 0.2 4,175.00 5.8 x 5.8 x 2
744731681 680.0 0.5 0.2 1,300.00 7.8 x 7.8 x 7.5
74477826 680.0 0.2 0.2 4,500.00 7.3 x 7.3 x 3.4
74477828 820.0 0.2 0.2 5,070.00 7.3 x 7.3 x 3.4
744778926 680.0 0.2 0.2 4,500.00 7.3 x 7.3 x 3.5
744778928 820.0 0.2 0.2 4,990.00 7.3 x 7.3 x 3.5
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