LT3761 Buck (multi-topology) LED driver IC overview

Description

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LT3761 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 LT3761 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 %. LT3761 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

LT3761 Datasheet

Link to the most up-to-date LT3761 datasheet and the product page for EVM, tools and support information.

LT3761

LT3761 inventory, samples and price

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Available Distributors with stock: 0

no online Distributor with LT3761 stock available

Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to LT3761. Optional, compare LT3761 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
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
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 LT3761.

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
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 10
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 8.3
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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