LT3990-3.3 Buck Converter overview

Description

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Category
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LT3990-3.3 is a 62.00 V sync Buck Converter from with 0.35 A output current. The maximum 62.00 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 33.00 µH, a typical external component count of 5 and achieves a peak efficiency of 83 %. Further LT3990-3.3 characteristics are a adjustable 840 kHz switching frequency and 1 available package option(s): MSOP-16 .

For the LT3990-3.3 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.

ParameterValueReplacement
Search Filter
V-IN min. 4.00 V
V-IN max. 62.00 V
I-OUT? 0.35 A
V-OUT min. 3.30 V
V-OUT max. 3.30 V
V-OUT 3.300 V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 840 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 2200 kHz
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. 4 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 yes
Topology Buck
Peak Efficiency 83 %
Component count min. 5
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN
SO/SOIC
SOP
DIP
TO
DDPAK

LT3990-3.3 Datasheet

Link to the most up-to-date LT3990-3.3 datasheet and the product page for EVM, tools and support information.

LT3990-3.3

LT3990-3.3 Sample stock and distributor price breaks

LT3990-3.3 prices and online available distributors.

OEMSecrets.com
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Available Distributors with stock: 0

no online Distributor with LT3990 stock available

Available Distributors with stock: 0

no online Distributor with LT3990 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3990-3.3. Optional, compare LT3990-3.3 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 LT3990-3.3.

V-IN max. 62 V, I-OUT 0.35 A, V-OUT min. 3.3 V, Frequency typ. 840 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025220 22.0 0.5 0.8 525.00 2.8 x 2.8 x 3
744025270 27.0 0.5 0.7 745.00 2.8 x 2.8 x 3
744025330 33.0 0.4 0.6 840.00 2.8 x 2.8 x 3
74404024220 22.0 0.5 0.6 910.00 2.5 x 2 x 1.2
74404032220 22.0 0.6 0.6 450.00 3 x 3 x 1.5
74404032330 33.0 0.5 0.5 911.00 3 x 3 x 1.5
74404041330 33.0 0.7 0.6 628.00 4 x 4 x 1.2
74404042330 33.0 0.7 0.9 460.00 4 x 4 x 1.8
744042220 22.0 0.9 0.6 280.00 4.8 x 4.8 x 2
744042330 33.0 0.7 0.5 382.00 4.8 x 4.8 x 2
744043220 22.0 0.9 0.7 160.00 4.8 x 4.8 x 3
744043270 27.0 0.9 0.6 170.00 4.8 x 4.8 x 3
744043330 33.0 0.8 0.6 195.00 4.8 x 4.8 x 3
744045220 22.0 0.6 1.0 560.00 4.5 x 3.2 x 2.9
744045330 33.0 0.4 0.9 880.00 4.5 x 3.2 x 2.9
744052220 22.0 0.8 0.9 240.00 5.8 x 5.8 x 2
744052270 27.0 0.8 0.8 250.00 5.8 x 5.8 x 2
744053220 22.0 1.2 0.9 100.00 5.8 x 5.8 x 3
744053270 27.0 1.1 0.8 135.00 5.8 x 5.8 x 3
744053330 33.0 0.9 0.8 180.00 5.8 x 5.8 x 3
744062220 22.0 1.2 1.0 100.00 6.8 x 6.8 x 2.5
744062330 33.0 0.9 0.8 150.00 6.8 x 6.8 x 2.5
7440680220 22.0 0.9 0.7 350.00 8 x 8 x 1.2
7440690220 22.0 1.0 0.9 272.00 8 x 8 x 1.5
7440700220 22.0 1.3 1.0 166.00 8 x 8 x 2
74408941330 33.0 0.5 0.9 1,015.00 4.8 x 4.8 x 2.1
744773127 27.0 0.9 1.0 328.00 4 x 4.5 x 3.5
744773133 33.0 0.9 0.9 370.00 4 x 4.5 x 3.5
784773127 27.0 0.9 1.0 328.00 4 x 4.5 x 3.5
784773133 33.0 0.9 0.9 370.00 4 x 4.5 x 3.5
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