LT3761A Buck (multi-topology) LED driver IC overview

Description

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LT3761A is a non-sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 60.0 V and it drives an output current of up to 5.00 A. Assuming a typical 3.5V LED forward voltage LT3761A can drive up to 15 LED in series.

The LED Buck (multi-topology) driver IC features adjustable 1000 kHz switching frequency, a feedback voltage of 0.11 V and requires a typical inductor size of 1.0 uH. This combination results in a peak efficiency of ~95 %. LT3761A comes in 1 package option(s) - MSOP-16 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 4.5 V
V-IN max. 60.0 V
Nr.of LEDs max. 15
I-OUT? 5.00 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. 2200 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ. 165.0 °C
Inductor size 1.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.11 V
Automotive AEC-Q100 no
Topology Buck (multi-topology)
Peak Efficiency 95 %
Component count min. 25
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 1
SC70
SOT
MSOP MSOP-16
QFN/DFN
SO/SOIC
SOP
DIP
TO
Variation
LED temperature compensation no

LT3761A Datasheet

Link to the most up-to-date LT3761A datasheet and the product page for EVM, tools and support information.

LT3761A

LT3761A inventory, samples and price

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Available Distributors with stock: 0

no online Distributor with LT3761A stock available

Available Distributors with stock: 5

Arrow Electronics

ProductStockPriceBuy
LT3761AEMSE#PBF 227
2504.01 $
1004.04 $
254.89 $
17.36 $
Buy Now
LT3761AIMSE#PBF 12
2504.37 $
1004.48 $
255.42 $
18.15 $
Buy Now
LT3761AEMSE#TRPBF 0
25003.95 $
Buy Now
LT3761AEMSE#PBF 0
5003.75 $
2503.84 $
1483.89 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3761AEMSE#PBF 251
5003.54 €
2503.63 €
1003.82 €
254.62 €
16.95 €
Buy Now
LT3761AIMSE#PBF 12
5003.93 €
2504.02 €
1004.23 €
255.12 €
17.70 €
Buy Now
LT3761AEMSE#TRPBF 0
25003.61 €
Buy Now
LT3761AIMSE#TRPBF 0
25004.00 €
Buy Now
show stock=0hide stock=0

Verical

ProductStockPriceBuy
LT3761AEMSE#PBF 227
2504.01 $
1004.04 $
254.89 $
27.36 $
Buy Now
LT3761AIMSE#PBF 37
282.28 $
Buy Now
LT3761AIMSE#PBF 12
2504.37 $
1004.48 $
255.42 $
28.15 $
Buy Now

Newark element14

ProductStockPriceBuy
LT3761AEMSE#PBF 6
5003.94 $
2504.03 $
1004.25 $
504.70 $
255.14 $
106.44 $
17.74 $
Buy Now
LT3761AIMSE#PBF 37
11.82 $
101.82 $
251.82 $
501.82 $
1001.82 $
2501.82 $
5001.82 $
Buy Now

Mouser Electronics

ProductStockPriceBuy
LT3761AIMSE#PBF 208
18.58 $
255.70 $
1004.71 $
2504.47 $
5004.37 $
10004.20 $
Buy Now

Available Distributors without stock: 2

element14 Asia-Pacific

ProductStockPriceBuy
LT3761AEMSE#PBF 0
5005.92 SGD
2506.05 SGD
1006.37 SGD
257.71 SGD
111.59 SGD
Buy Now
LT3761AIMSE#PBF 0
5006.56 SGD
2506.71 SGD
1007.06 SGD
258.54 SGD
112.85 SGD
Buy Now

Farnell element14

ProductStockPriceBuy
LT3761AEMSE#PBF 0
5003.03 GBP
2503.11 GBP
1003.19 GBP
503.26 GBP
253.34 GBP
105.02 GBP
15.52 GBP
Buy Now
LT3761AIMSE#PBF 0
12.90 GBP
Buy Now

Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to LT3761A. Optional, compare LT3761A side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3761 LT3761 product overviewLT3761 product overview Linear Technology MSOP-16
0% LM3424 LM3424 product overviewLM3424 product overview Texas Instruments HTSSOP-20
0% LM3424-Q1 LM3424-Q1 product overviewLM3424-Q1 product overview Texas Instruments HTSSOP-20
0% TPS92691 TPS92691 product overviewTPS92691 product overview Texas Instruments HTSSOP-16
0% TPS92691-Q1 TPS92691-Q1 product overviewTPS92691-Q1 product overview Texas Instruments HTSSOP-16
0% LT3761-1 LT3761-1 product overviewLT3761-1 product overview Linear Technology MSOP-16
50% LT3952 LT3952 product overviewLT3952 product overview Linear Technology TSSOP-28

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3761A.

V-IN min. 4.5 V, V-IN max. 60 V, I-OUT 5 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404084022 2.2 5.2 7.8 12.00 8 x 8 x 4.2
7440660022 2.2 6.7 6.8 7.70 10 x 10 x 4.1
744071022 2.2 5.4 6.3 10.00 8 x 8 x 4.6
744310200 2.0 6.5 9.0 14.20 7 x 6.9 x 3.3
744314200 2.0 11.5 9.0 5.85 7 x 6.9 x 5
744316220 2.2 7.5 7.5 11.30 5.5 x 5.3 x 4.3
7443552280 2.8 9.5 11.0 10.60 10.5 x 10.2 x 4.2
74438357018 1.8 5.8 8.0 18.00 4.1 x 4.1 x 3.1
74438357022 2.2 5.2 7.0 22.00 4.1 x 4.1 x 3.1
7447471022 2.2 8.2 10.0 7.50 10.5 x 10.5 x 11.5
744771002 2.2 10.0 11.0 5.00 12 x 12 x 6
7447713022 2.2 5.1 8.5 16.80 10 x 10 x 3
7447714022 2.2 8.6 9.5 6.80 10 x 10 x 5
7447715001 1.8 7.6 10.2 7.50 12 x 12 x 4.5
7447715002 2.5 6.8 8.5 8.50 12 x 12 x 4.5
744772022 2.2 6.0 8.0 7.25 7.8 x 7.8 x 9.5
744777002 2.2 6.0 6.5 13.00 7.3 x 7.3 x 4.5
7447797250 2.5 8.4 10.5 9.00 10.2 x 10.2 x 4.5
7447798250 2.5 13.7 10.1 4.40 10.2 x 10.2 x 6.4
784771022 2.2 7.2 10.5 10.50 12 x 12 x 6.3
784775022 2.2 6.0 6.0 8.00 7 x 7.8 x 5.5
784776022 2.2 7.0 8.0 7.00 9 x 10 x 5.9
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