LT3756 Buck (multi-topology) LED driver IC overview

Description

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Category
Sub-Category

LT3756 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 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 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

LT3756 Datasheet

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

LT3756

LT3756 inventory, samples and price

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Available Distributors with stock: 6

Chip One Stop (4)

ProductStockPriceBuy
LT3756EMSE-1#PBF105
16.18 USD
105.33 USD
504.31 USD
Buy Now
LT3756EMSE#PBF2
16.34 USD
Buy Now
LT3756EUD#PBF111
16.12 USD
105.28 USD
504.28 USD
Buy Now
LT3756IMSE-2#PBF11
17.02 USD
104.97 USD
Buy Now

Digi-Key (18)

ProductStockPriceBuy
LT3756EUD-2#PBF1556Buy Now
LT3756EUD#PBF1176Buy Now
LT3756EMSE#PBF3049Buy Now
LT3756EMSE-1#PBF2331Buy Now
LT3756IMSE#PBF1480Buy Now
LT3756IMSE-2#PBF295Buy Now
LT3756EUD-1#PBF324Buy Now
LT3756IUD#PBF333Buy Now
LT3756IMSE-1#PBF269Buy Now
LT3756EUD#TRPBF0Buy Now
LT3756EUD#TRPBF2188Buy Now
LT3756EUD#TRPBF2188Buy Now
LT3756EMSE#TRPBF0Buy Now
LT3756EMSE#TRPBF2497Buy Now
LT3756EMSE#TRPBF2497Buy Now
LT3756EMSE-2#TRPBF0Buy Now
LT3756EMSE-2#TRPBF517Buy Now
LT3756EMSE-2#TRPBF517Buy Now
DC1319B-A2Buy Now
DC1319B-B2Buy Now
LT3756IUD-1#PBF28Buy Now
LT3756EMSE-2#PBF0Buy Now
LT3756EUD-1#TRPBF0Buy Now
LT3756EUD-2#TRPBF0Buy Now
LT3756EMSE-1#TRPBF0Buy Now

Element14 (2)

ProductStockPriceBuy
LT3756EMSE-2#PBF0Buy Now
LT3756EMSE#PBF105Buy Now
LT3756IMSE-2#PBF4Buy Now

Farnell Element14 (2)

ProductStockPriceBuy
LT3756EMSE-2#PBF0Buy Now
LT3756EMSE#PBF247Buy Now
LT3756EUD#PBF0Buy Now
LT3756IMSE-2#PBF4Buy Now
LT3756IMSE#PBF0Buy Now

RS Components (4)

ProductStockPriceBuy
LT3756EMSE-2#PBF24Buy Now
LT3756EMSE-2#PBF35Buy Now
LT3756EMSE#PBF37Buy Now
LT3756EUD#PBF286Buy Now

Transfer Multisort Elektronik (1)

ProductStockPriceBuy
LT3756EMSE#PBF13Buy Now

Available Distributors without stock: 1

Rutronik (0)

ProductStockPriceBuy
nnBuy Now

Available Distributors with stock: 10

Arrow Electronics

ProductStockPriceBuy
LT3756EUD-1#PBF 241
1003.52 $
14.14 $
Buy Now
LT3756EUD#PBF 111
1003.52 $
14.14 $
Buy Now
LT3756EMSE-1#PBF 105
1003.64 $
14.29 $
Buy Now
LT3756IMSE-2#PBF 11
1004.13 $
14.86 $
Buy Now
LT3756IMSE#PBF 4
1004.13 $
14.86 $
Buy Now
LT3756EMSE#PBF 2
1003.64 $
14.29 $
Buy Now

Digi-Key

ProductStockPriceBuy
LT3756EMSE#PBF 3049
1003.17 €
253.73 €
15.58 €
Buy Now
LT3756EMSE#TRPBF 2497
2503.58 €
1003.91 €
255.69 €
16.37 €
Buy Now
LT3756EMSE#TRPBF 2497
2503.58 €
1003.91 €
255.69 €
16.37 €
Buy Now
LT3756EMSE-1#PBF 2331
1003.17 €
253.73 €
15.58 €
Buy Now
LT3756EUD#TRPBF 2188
2503.47 €
1003.78 €
255.51 €
16.17 €
Buy Now
LT3756EUD#TRPBF 2188
2503.47 €
1003.78 €
255.51 €
16.17 €
Buy Now
LT3756EUD-2#PBF 1556
1003.06 €
253.60 €
15.40 €
Buy Now
LT3756IMSE#PBF 1480
1003.60 €
254.23 €
16.32 €
Buy Now
LT3756EUD#PBF 1176
1003.06 €
253.60 €
15.40 €
Buy Now
LT3756IUD#PBF 333
1003.49 €
254.10 €
16.15 €
Buy Now
LT3756EUD-1#PBF 324
1003.06 €
253.60 €
15.40 €
Buy Now
LT3756IMSE-2#PBF 295
1003.60 €
254.23 €
16.32 €
Buy Now
LT3756IMSE-1#PBF 269
1003.60 €
254.23 €
16.32 €
Buy Now
LT3756EUD#TRPBF 0
25003.15 €
Buy Now
LT3756EMSE#TRPBF 0
25003.26 €
Buy Now
show stock=0hide stock=0

Verical

ProductStockPriceBuy
LT3756EUD-1#PBF 241
1003.52 $
24.14 $
Buy Now
LT3756EUD#PBF 111
1003.52 $
24.14 $
Buy Now
LT3756EMSE-1#PBF 105
1003.64 $
24.29 $
Buy Now
LT3756IMSE-2#PBF 11
24.86 $
Buy Now
LT3756IMSE#PBF 4
14.86 $
Buy Now
LT3756EMSE#PBF 2
24.29 $
Buy Now

Mouser Electronics

ProductStockPriceBuy
LT3756EUD-2#PBF 641
16.34 $
105.81 $
254.22 $
1003.59 $
Buy Now
LT3756EUD#PBF 396
16.34 $
105.81 $
254.22 $
1003.59 $
Buy Now
LT3756EMSE#PBF 203
16.55 $
106.00 $
254.38 $
1003.71 $
Buy Now
LT3756EUD-1#PBF 242
16.34 $
105.81 $
254.22 $
1003.59 $
Buy Now
LT3756EMSE-1#PBF 222
16.55 $
106.00 $
254.38 $
1003.71 $
Buy Now
LT3756EMSE-2#PBF 72
16.55 $
106.00 $
254.38 $
1003.71 $
Buy Now
LT3756IMSE#PBF 0
17.42 $
106.80 $
254.96 $
1004.21 $
Buy Now
LT3756EUD#TRPBF 0
25003.69 $
Buy Now
LT3756EMSE#TRPBF 0
25003.81 $
Buy Now
LT3756EMSE-2#TRPBF 0
25003.81 $
Buy Now
LT3756IMSE-2#PBF 0
1854.21 $
Buy Now
LT3756IUD#TRPBF 0
25004.19 $
Buy Now
LT3756IMSE-1#PBF 0
1854.21 $
Buy Now
LT3756HMSE-2#PBF 0
1854.52 $
Buy Now
LT3756IUD#PBF 0
2424.09 $
Buy Now
show stock=0hide stock=0

Quest Components

ProductStockPriceBuy
LT3756EMSE-1#PBF 8
55.93 $
26.73 $
18.08 $
Buy Now

TME Electronic Components

ProductStockPriceBuy
LT3756EMSE#PBF 13
16.26 $
35.44 $
105.06 $
254.58 $
Buy Now

element14 Asia-Pacific

ProductStockPriceBuy
LT3756IMSE-2#PBF 4
19.32 $
256.23 $
1005.29 $
Buy Now
LT3756EMSE#PBF 105
18.22 $
255.50 $
1004.67 $
Buy Now

Farnell element14

ProductStockPriceBuy
LT3756IMSE-2#PBF 4
16.13 GBP
105.59 GBP
253.74 GBP
503.64 GBP
1003.56 GBP
Buy Now
LT3756EMSE#PBF 247
15.32 GBP
104.43 GBP
253.23 GBP
503.13 GBP
1003.02 GBP
Buy Now

Chip1Stop

ProductStockPriceBuy
LT3756IMSE-2#PBF 11
104.97 $
17.02 $
Buy Now
LT3756EMSE-1#PBF 105
504.31 $
105.33 $
16.18 $
Buy Now
LT3756EMSE#PBF 2
16.34 $
Buy Now
LT3756EUD#PBF 111
504.28 $
105.28 $
16.12 $
Buy Now

RS Components

ProductStockPriceBuy
LT3756EMSE-2#PBF 24
15.71 GBP
75.08 GBP
194.45 GBP
Buy Now
LT3756EMSE-2#PBF 35
75.08 GBP
194.45 GBP
Buy Now
LT3756EMSE#PBF 37
105.40 GBP
254.63 GBP
504.26 GBP
753.92 GBP
Buy Now
LT3756EUD#PBF 286
64.98 GBP
304.49 GBP
614.00 GBP
Buy Now

Equivalents and alternatives

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

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

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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