LT3519-1 Buck (multi-topology) LED driver IC overview

Description

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LT3519-1 is a sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 30.0 V and it drives an output current of up to 0.50 A. Assuming a typical 3.5V LED forward voltage LT3519-1 can drive up to 7 LED in series.

The LED Buck (multi-topology) driver IC features fixed 1000 kHz switching frequency, a feedback voltage of 0.10 V and requires a typical inductor size of 47.0 uH. This combination results in a peak efficiency of ~91 %. LT3519-1 comes in 1 package option(s) - MSOP-16 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 3.0 V
V-IN max. 30.0 V
Nr.of LEDs max. 7
I-OUT? 0.50 A
MOSFET intern
ext.clock sync. no
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency adjustable fixed
Frequency min.
Frequency max.
Softstart no
Softstart adjustable no
Quiescent current max. 3500 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size 47.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.10 V
Automotive AEC-Q100 no
Topology Buck (multi-topology)
Peak Efficiency 91 %
Component count min. 12
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

LT3519-1 Datasheet

Link to the most up-to-date LT3519-1 datasheet and the product page for EVM, tools and support information.

LT3519-1

LT3519-1 inventory, samples and price

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Farnell element14

ProductStockPriceBuy
LT3519EMS#PBF 127
15.72 €
1002.87 €
15.72 €
253.43 €
1002.87 €
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Bristol Electronics

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LT3519EMS#PBF 158 Buy Now

Conrad Electronic

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LT3519EMS-2#PBF 99999999
16.71 €
106.38 €
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element14 Asia-Pacific

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LT3519EMS#PBF 103
16.84 $
254.57 $
1003.88 $
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Newark element14

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LT3519EMS#PBF 46
13.04 $
253.04 $
1003.04 $
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LT3519EMS-1#PBF 0
15.35 $
253.59 $
1003.04 $
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Chip1Stop

ProductStockPriceBuy
LT3519EMS-2#PBF 547
13.57 $
1003.04 $
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Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to LT3519-1. Optional, compare LT3519-1 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3519 LT3519 product overviewLT3519 product overview Linear Technology MSOP-16
0% LT3519-2 LT3519-2 product overviewLT3519-2 product overview Linear Technology MSOP-16
10% TPS92550 TPS92550 product overviewTPS92550 product overview Texas Instruments TO263-7
10% TPS92551 TPS92551 product overviewTPS92551 product overview Texas Instruments TO263-7

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3519-1.

V-IN min. 3 V, V-IN max. 30 V, I-OUT 0.5 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025150 15.0 0.7 0.9 356.00 2.8 x 2.8 x 3
74404032150 15.0 0.7 0.8 300.00 3 x 3 x 1.5
74404042150 15.0 0.9 1.2 210.00 4 x 4 x 1.8
744042120 12.0 1.2 1.0 150.00 4.8 x 4.8 x 2
744042150 15.0 1.0 0.8 190.00 4.8 x 4.8 x 2
744042180 18.0 0.9 0.7 270.00 4.8 x 4.8 x 2
744043120 12.0 1.1 1.0 100.00 4.8 x 4.8 x 3
744043150 15.0 1.0 0.8 120.00 4.8 x 4.8 x 3
744043180 18.0 1.0 0.7 150.00 4.8 x 4.8 x 3
744045120 12.0 0.8 1.4 336.00 4.5 x 3.2 x 2.9
744045150 15.0 0.7 1.2 400.00 4.5 x 3.2 x 2.9
744045180 18.0 0.7 1.1 480.00 4.5 x 3.2 x 2.9
744052120 12.0 1.0 1.2 130.00 5.8 x 5.8 x 2
744052150 15.0 1.0 1.1 175.00 5.8 x 5.8 x 2
744052180 18.0 0.9 1.0 185.00 5.8 x 5.8 x 2
744053120 12.0 1.5 1.3 70.00 5.8 x 5.8 x 3
744053150 15.0 1.4 1.2 80.00 5.8 x 5.8 x 3
744053180 18.0 1.3 1.1 90.00 5.8 x 5.8 x 3
744062120 12.0 1.4 1.3 70.00 6.8 x 6.8 x 2.5
744062150 15.0 1.3 1.1 80.00 6.8 x 6.8 x 2.5
744062180 18.0 1.3 1.0 90.00 6.8 x 6.8 x 2.5
7440680120 12.0 1.2 1.0 195.00 8 x 8 x 1.2
7440680150 15.0 1.1 0.8 213.00 8 x 8 x 1.2
7440680180 18.0 0.9 0.8 302.00 8 x 8 x 1.2
7440690120 12.0 1.4 1.2 148.00 8 x 8 x 1.5
7440690150 15.0 1.3 1.1 179.00 8 x 8 x 1.5
7440690180 18.0 1.1 1.1 225.00 8 x 8 x 1.5
7440700150 15.0 1.7 1.3 117.00 8 x 8 x 2
7440700180 18.0 1.5 1.1 135.00 8 x 8 x 2
74408941150 15.0 0.8 1.4 430.00 4.8 x 4.8 x 2.1
744773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
7447785115 15.0 1.6 1.4 165.00 5.9 x 6.2 x 3.3
784773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
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