LT3756-2 Buck (multi-topology) LED driver IC overview

Description

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LT3756-2 is a non-sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 100.0 V and it drives an output current of up to 1.00 A. Assuming a typical 3.5V LED forward voltage LT3756-2 can drive up to 25 LED in series.

The LED Buck (multi-topology) driver IC features adjustable 1000 kHz switching frequency, a feedback voltage of 0.10 V and requires a typical inductor size of 33.0 uH. This combination results in a peak efficiency of ~95 %. LT3756-2 comes in 2 package option(s) - MSOP-16 QFN-16 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 6.0 V
V-IN max. 100.0 V
Nr.of LEDs max. 25
I-OUT? 1.00 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. 1700 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ. 165.0 °C
Inductor size 33.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.10 V
Automotive AEC-Q100 no
Topology Buck (multi-topology)
Peak Efficiency 95 %
Component count min. 23
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 2
SC70
SOT
MSOP MSOP-16
QFN/DFN QFN-16
SO/SOIC
SOP
DIP
TO
Variation
LED temperature compensation no

LT3756-2 Datasheet

Link to the most up-to-date LT3756-2 datasheet and the product page for EVM, tools and support information.

LT3756-2

LT3756-2 inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to LT3756-2. Optional, compare LT3756-2 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3756 LT3756 product overviewLT3756 product overview Linear Technology MSOP-16, QFN-16
0% LT3756-1 LT3756-1 product overviewLT3756-1 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 LT3756-2.

V-IN min. 6 V, V-IN max. 100 V, I-OUT 1 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404054150 15.0 2.0 2.2 86.00 5 x 5 x 4
74404063150 15.0 1.5 1.9 125.00 6 x 6 x 2.8
74404064180 18.0 1.9 2.4 81.00 6 x 6 x 4.5
744053120 12.0 1.5 1.3 70.00 5.8 x 5.8 x 3
744062120 12.0 1.4 1.3 70.00 6.8 x 6.8 x 2.5
744065150 15.0 2.2 2.3 69.00 10 x 10 x 3.1
7440690120 12.0 1.4 1.2 148.00 8 x 8 x 1.5
7440700150 15.0 1.7 1.3 117.00 8 x 8 x 2
744071150 15.0 2.8 2.3 46.00 8 x 8 x 4.6
74408942150 15.0 1.1 1.6 207.00 4.8 x 4.8 x 3.1
74408943150 15.0 1.4 1.7 118.00 4.8 x 4.8 x 4.1
74437324150 15.0 1.2 2.1 325.00 4.45 x 4.06 x 2
744773112 12.0 1.3 1.6 156.00 4 x 4.5 x 3.5
744773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
744773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
744775112 12.0 2.2 2.2 41.70 7 x 7.8 x 5.5
744775115 15.0 1.9 2.2 43.90 7 x 7.8 x 5.5
744775118 18.0 1.9 2.1 52.60 7 x 7.8 x 5.5
744777112 12.0 1.8 2.4 54.00 7.3 x 7.3 x 4.5
744777115 15.0 1.6 2.2 70.00 7.3 x 7.3 x 4.5
744777118 18.0 1.5 2.1 80.00 7.3 x 7.3 x 4.5
7447779112 12.0 1.8 2.4 50.00 7.3 x 7.3 x 4.5
7447779115 15.0 1.6 2.2 70.00 7.3 x 7.3 x 4.5
7447779118 18.0 1.5 2.1 80.00 7.3 x 7.3 x 4.5
744778112 12.0 1.7 2.2 76.00 7.3 x 7.3 x 3.4
744778115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.4
744778118 18.0 1.4 1.7 114.00 7.3 x 7.3 x 3.4
7447785115 15.0 1.6 1.4 165.00 5.9 x 6.2 x 3.3
7447789112 12.0 1.7 1.9 76.00 7.3 x 7.3 x 3.5
7447789115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.5
7447789118 18.0 1.4 1.7 114.00 7.3 x 7.3 x 3.5
744787120 12.0 2.5 2.4 45.00 7.8 x 7 x 5
744787150 15.0 2.3 2.1 52.00 7.8 x 7 x 5
744787180 18.0 2.2 1.9 67.00 7.8 x 7 x 5
784773112 12.0 1.3 1.6 156.00 4 x 4.5 x 3.5
784773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
784773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
784774112 12.0 2.0 1.9 82.00 5.2 x 5.8 x 4.85
784774115 15.0 1.5 1.9 89.00 5.2 x 5.8 x 4.85
784774118 18.0 1.5 1.7 104.00 5.2 x 5.8 x 4.85
784775112 12.0 2.2 2.2 42.00 7 x 7.8 x 5.5
784775115 15.0 1.9 2.2 44.00 7 x 7.8 x 5.5
784775118 18.0 1.9 2.1 53.00 7 x 7.8 x 5.5
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