LTC3119 Buck-Boost Converter Overview



LTC3119 is a 18.00 V, 5.00 A output current sync Buck-Boost Converter from . The 2.50 V to 18.00 V input range can be converted into a 0.80 V to 18.00 V output voltage.

The Buck-Boost Converter features adjustable 1000 kHz switching frequency, requires a typical inductor size of 3.3 µH and provides a peak efficiency of 96 %. LTC3119 circuitry consists typically of 12 external components and is available in 2 package option(s): QFN-28 TSSOP-28 .

For LTC3119 replacement search, 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.

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V-IN min. 2.50 V
V-IN max. 18.00 V
I-OUT? 5.00 A
V-OUT min. 0.80 V
V-OUT max. 18.00 V
V-OUT fixed adjustable
V-OUT programmable no
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency adjustable adjustable
Frequency adjustable min. 400 kHz
Frequency adjustable max. 2000 kHz
ext.clock sync yes
Frequency sync. min. 400 kHz
Frequency sync. max. 2000 kHz
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. -31 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ. 165 °C
Inductor size typ. 3.3 µH
Automotive AEC-Q100 no
Light-Load Mode yes
Topology Buck-Boost
Peak Efficiency 96 %
Component count min. 12
current limit adjustable no
Nr. of package options 2

Charts and pictures

LTC3119 Datasheet

Link to the most up-to-date LTC3119 datasheet and the product page for EVM, tools and support information.


LTC3119 Distributor price breaks and sample stock

LTC3119 prices and available buy online distributors. Optional, check regional sources for price and inventory: for Russia via efind, for South Korea via ICPart, for Japan via ICBAIBAI, for China via IC5858 or International via IC2IC.

Available Distributors with stock: 0

no online Distributor with LTC3119 stock available

Available Distributors with stock: 0

no online Distributor with LTC3119 stock available

Equivalents and alternatives

The following Buck-Boost DC/DC Converter are similar to LTC3119. Optional, compare LTC3119 side-by-side with other selected Buck-Boost 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 LTC3119.

V-IN max. 18 V, I-OUT 5 A, V-OUT min. 0.8 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74407000047 0.5 7.8 6.5 5.80 8 x 8 x 2
744373210047 0.5 5.4 9.0 18.00 4.45 x 4.06 x 1.2
744373240056 0.6 6.0 10.5 13.50 4.45 x 4.06 x 2
744383560056 0.6 8.5 10.8 7.00 4.1 x 4.1 x 2.1
744778005 0.5 5.6 9.0 7.20 7.3 x 7.3 x 3.4
784383560056 0.6 8.5 10.8 7.00 4.1 x 4.1 x 2.1
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