LTC3642-3.3 Buck Converter overview



LTC3642-3.3 is a 45.00 V sync Buck Converter from with 0.05 A output current. The maximum 45.00 V input voltage can be regulated down into a 3.30 V to 3.30 V output voltage.

It requires are a typical inductor size of 150.00 µH, a typical external component count of 3 and achieves a peak efficiency of 92 %. Further LTC3642-3.3 characteristics are a fixed 100 kHz switching frequency and 2 available package option(s): MSOP-8 DFN-8 .

For the LTC3642-3.3 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.

Search Filter
V-IN min. 4.50 V
V-IN max. 45.00 V
I-OUT? 0.05 A
V-OUT min. 3.30 V
V-OUT max. 3.30 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 100 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.
Inductor size typ. 150.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 92 %
Component count min. 3
current limit adjustable yes
Nr.of packages 2

LTC3642-3.3 Datasheet

Link to the most up-to-date LTC3642-3.3 datasheet and the product page for EVM, tools and support information.


LTC3642-3.3 Sample stock and distributor price breaks

LTC3642-3.3 prices and online available distributors.

Available Distributors with stock: 0

no online Distributor with LTC3642 stock available

Available Distributors with stock: 0

no online Distributor with LTC3642 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3642-3.3. Optional, compare LTC3642-3.3 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3631 LTC3631 product overviewLTC3631 product overview Linear Technology DFN-8, MSOP-8
0% LTC3642 LTC3642 product overviewLTC3642 product overview Linear Technology DFN-8, MSOP-8
10% LTC3632 LTC3632 product overviewLTC3632 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 LTC3642-3.3.

V-IN max. 45 V, I-OUT 0.05 A, V-OUT min. 3.3 V, Frequency typ. 100 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744045152 1,500.0 0.1 0.1 30,800.00 4.5 x 3.2 x 2.9
744062152 1,500.0 0.1 0.1 8,000.00 6.8 x 6.8 x 2.5
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