LT3795 Buck (multi-topology) LED driver IC overview

Description

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LT3795 is a non-sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 80.0 V and it drives an output current of up to 2.50 A. Assuming a typical 3.5V LED forward voltage LT3795 can drive up to 20 LED in series.

The LED Buck (multi-topology) driver IC features adjustable 1000 kHz switching frequency, a feedback voltage of 0.12 V and requires a typical inductor size of 22.0 uH. This combination results in a peak efficiency of ~94 %. LT3795 comes in 1 package option(s) - TSSOP-28 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 4.5 V
V-IN max. 80.0 V
Nr.of LEDs max. 20
I-OUT? 2.50 A
MOSFET extern
ext.clock sync. no
sync/non-sync non-sync
Frequency typ. 1000 kHz
Frequency adjustable adjustable
Frequency min. 100 kHz
Frequency max. 1000 kHz
Softstart yes
Softstart adjustable yes
Quiescent current max. 3500 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ. 150.0 °C
Inductor size 22.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.12 V
Automotive AEC-Q100 no
Topology Buck (multi-topology)
Peak Efficiency 94 %
Component count min. 27
DC Dimming no
PWM Dimming yes
digital dimming no
Nr. of package options 1
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP TSSOP-28
DIP
TO
Variation
LED temperature compensation no

LT3795 Datasheet

Link to the most up-to-date LT3795 datasheet and the product page for EVM, tools and support information.

LT3795

LT3795 inventory, samples and price

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no online Distributor with LT3795 stock available

Available Distributors with stock: 0

no online Distributor with LT3795 stock available

Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to LT3795. Optional, compare LT3795 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
25% LT3796 LT3796 product overviewLT3796 product overview Linear Technology TSSOP-28
25% LT3796-1 LT3796-1 product overviewLT3796-1 product overview Linear Technology TSSOP-28
50% LT3755 LT3755 product overviewLT3755 product overview Linear Technology QFN-16
50% LT3755-1 LT3755-1 product overviewLT3755-1 product overview Linear Technology QFN-16
50% LT3755-2 LT3755-2 product overviewLT3755-2 product overview Linear Technology MSOP-16, QFN-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3795.

V-IN min. 4.5 V, V-IN max. 80 V, I-OUT 2.5 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404052033 3.3 2.6 3.0 42.20 5 x 5 x 2
74404054033 3.3 3.4 4.3 24.00 5 x 5 x 4
74404054047 4.7 3.0 3.8 30.00 5 x 5 x 4
74404063033 3.3 3.5 4.5 25.00 6 x 6 x 2.8
74404063047 4.7 3.1 3.3 30.00 6 x 6 x 2.8
74404064047 4.7 3.3 5.5 26.00 6 x 6 x 4.5
7440650033 3.3 5.3 4.7 15.00 10 x 10 x 3.1
7440650047 4.7 4.6 4.2 16.50 10 x 10 x 3.1
744066005 5.0 4.9 5.5 14.50 10 x 10 x 4.1
744071039 3.9 4.9 4.5 13.00 8 x 8 x 4.6
744071047 4.7 4.8 4.3 17.00 8 x 8 x 4.6
744071056 5.6 4.0 4.0 20.00 8 x 8 x 4.6
74408943033 3.3 2.6 3.6 31.00 4.8 x 4.8 x 4.1
744316330 3.3 5.8 5.8 18.50 5.5 x 5.3 x 4.3
744316470 4.7 4.6 4.7 24.50 5.5 x 5.3 x 4.3
744316560 5.6 4.5 4.6 28.50 5.5 x 5.3 x 4.3
74437324033 3.3 2.5 4.2 69.00 4.45 x 4.06 x 2
74437336056 5.6 3.0 6.0 55.00 5.7 x 5.2 x 3
74438356033 3.3 3.6 5.5 39.90 4.1 x 4.1 x 2.1
74438356047 4.7 2.9 4.7 63.00 4.1 x 4.1 x 2.1
74438356056 5.6 2.8 4.6 68.00 4.1 x 4.1 x 2.1
7447462033 3.3 4.7 4.0 16.00 5.5 x 5.5 x 8.5
7447462047 4.7 4.2 3.7 19.00 5.5 x 5.5 x 8.5
7447471047 4.7 6.9 6.0 10.50 10.5 x 10.5 x 11.5
7447713047 4.7 4.0 6.0 26.00 10 x 10 x 3
744772047 4.7 4.0 5.4 11.60 7.8 x 7.8 x 10
744777003 3.3 3.5 4.6 25.00 7.3 x 7.3 x 4.5
744777004 4.7 3.2 4.0 25.00 7.3 x 7.3 x 4.5
7447779003 3.3 3.3 4.5 26.00 7.3 x 7.3 x 4.5
7447779004 4.7 3.2 4.4 28.00 7.3 x 7.3 x 4.5
744778003 3.3 3.1 4.1 24.00 7.3 x 7.3 x 3.4
7447785003 3.3 2.8 3.0 43.00 5.9 x 6.2 x 3.3
7447789003 3.3 3.4 4.2 24.00 7.3 x 7.3 x 3.5
7447789004 4.7 2.9 3.9 33.00 7.3 x 7.3 x 3.5
744787039 3.9 3.8 4.0 16.70 7.8 x 7 x 5
744787047 4.7 3.3 3.6 24.30 7.8 x 7 x 5
784774047 4.7 3.0 5.5 56.00 5.2 x 5.8 x 4.85
784775033 3.3 4.9 4.9 12.00 7 x 7.8 x 5.5
784775047 4.7 4.5 4.5 16.00 7 x 7.8 x 5.5
784775056 5.6 4.0 4.0 18.00 7 x 7.8 x 5.5
784776047 4.7 5.0 6.0 12.00 9 x 10 x 5.9
784776056 5.6 4.8 5.5 15.00 9 x 10 x 5.9
784777033 3.3 2.5 4.7 58.00 7.3 x 7.3 x 4.3
784778033 3.3 2.7 3.7 54.00 7.3 x 7.3 x 3.5
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