LT3990 Buck Converter overview

Description

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LT3990 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 1.21 V to 60.00 V output voltage.

It requires are a typical inductor size of 33.00 µH, a typical external component count of 7 and achieves a peak efficiency of 83 %. Further LT3990 characteristics are a adjustable 840 kHz switching frequency and 2 available package option(s): MSOP-16 DFN-10 .

For the LT3990 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. 1.21 V
V-OUT max. 60.00 V
V-OUT adjustable 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. 7
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3990 Datasheet

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

LT3990

LT3990 Sample stock and distributor price breaks

LT3990 prices and online available distributors.

OEMSecrets.com
findchips.com

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. Optional, compare LT3990 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LM46000 LM46000 product overviewLM46000 product overview Texas Instruments HTSSOP-16
0% LM46000-Q1 LM46000-Q1 product overviewLM46000-Q1 product overview Texas Instruments HTSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3990.

V-IN max. 62 V, I-OUT 0.35 A, V-OUT min. 1.21 V, Frequency typ. 840 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025150 15.0 0.7 0.9 356.00 2.8 x 2.8 x 3
744029100 10.0 0.7 0.5 390.00 2.8 x 2.8 x 1.5
744031100 10.0 0.7 0.6 185.00 3.8 x 3.8 x 1.8
744031150 15.0 0.6 0.5 255.00 3.8 x 3.8 x 1.8
74404024100 10.0 0.5 0.9 435.00 2.5 x 2 x 1.2
74404024150 15.0 0.5 0.8 830.00 2.5 x 2 x 1.2
74404032100 10.0 0.8 0.9 230.00 3 x 3 x 1.5
74404032150 15.0 0.7 0.8 300.00 3 x 3 x 1.5
744042150 15.0 1.0 0.8 190.00 4.8 x 4.8 x 2
744043150 15.0 1.0 0.8 120.00 4.8 x 4.8 x 3
7440680150 15.0 1.1 0.8 213.00 8 x 8 x 1.2
74479889310 10.0 0.8 0.5 500.00 2.5 x 2 x 1.2
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