LT3519-2 Buck (multi-topology) LED driver IC overview

Description

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LT3519-2 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 LT3519-2 can drive up to 7 LED in series.

The LED Buck (multi-topology) driver IC features fixed 2200 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 ~91 %. LT3519-2 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. 2200 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 33.0 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

LT3519-2 Datasheet

Link to the most up-to-date LT3519-2 datasheet and the product page for EVM, tools and support information.

LT3519-2

LT3519-2 inventory, samples and price

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Available Distributors with stock: 6

ARROW-NAC (3)

ProductStockPriceBuy
LT3519EMS#PBF982
13.57 USD
1003.04 USD
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LT3519EMS-2#PBF547
13.57 USD
1003.04 USD
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LT3519IMS#PBF177
14.20 USD
1003.57 USD
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Chip-One-Stop (3)

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LT3519EMS-2#PBF68
14.69 USD
104.51 USD
503.24 USD
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LT3519EMS#PBF692
15.45 USD
104.58 USD
254.53 USD
504.32 USD
1004.22 USD
2004.03 USD
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LT3519IMS#PBF187
16.41 USD
105.39 USD
255.33 USD
505.09 USD
1004.96 USD
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DIGI-KEY (4)

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LT3519EMS-2#PBF678
15.35 USD
253.57 USD
1003.04 USD
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LT3519EMS#PBF550
15.35 USD
253.57 USD
1003.04 USD
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LT3519IMS#PBF393
15.90 USD
254.20 USD
1003.57 USD
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LT3519IMS-1#PBF26
15.90 USD
254.20 USD
1003.57 USD
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LT3519EMS-1#PBF0
15.35 USD
253.57 USD
1003.04 USD
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LT3519EMS#TRPBF0
25003.14 USD
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LT3519EMS-1#TRPBF0
25003.14 USD
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LT3519EMS-2#TRPBF0
25003.14 USD
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LT3519IMS-2#PBF0
2223.57 USD
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LT3519IMS#TRPBF0
25003.67 USD
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LT3519IMS-1#TRPBF0
25003.67 USD
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LT3519IMS-2#TRPBF0
25003.67 USD
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Element14 (1)

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LT3519EMS#PBF77
18.55 USD
255.71 USD
1004.86 USD
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FARNELL-ELEMENT14 (1)

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LT3519EMS#PBF107Buy Now

NEWARK (1)

ProductStockPriceBuy
LT3519EMS-1#PBF0
15.35 USD
253.59 USD
1003.04 USD
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LT3519EMS#PBF46
13.04 USD
253.04 USD
1003.04 USD
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Available Distributors with stock: 6

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

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

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

ProductStockPriceBuy
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 LT3519-2. Optional, compare LT3519-2 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% LT3519-1 LT3519-1 product overviewLT3519-1 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 LT3519-2.

V-IN min. 3 V, V-IN max. 30 V, I-OUT 0.5 A, Frequency typ. 2200 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025006 6.8 1.1 1.3 142.00 2.8 x 2.8 x 3
744028004 4.7 0.9 0.7 265.00 2.8 x 2.8 x 1.2
744029004 4.7 1.0 0.8 170.00 2.8 x 2.8 x 1.5
744029006 6.8 0.8 0.7 250.00 2.8 x 2.8 x 1.5
744031004 4.7 1.2 0.9 90.00 3.8 x 3.8 x 1.8
744031006 6.8 0.9 0.8 135.00 3.8 x 3.8 x 1.8
74404024047 4.7 1.1 1.2 175.00 2.5 x 2 x 1.2
74404024068 6.8 0.9 1.0 300.00 2.5 x 2 x 1.2
74404032047 4.7 1.3 1.2 96.00 3 x 3 x 1.5
74404032068 6.8 1.2 0.9 120.00 3 x 3 x 1.5
744042006 6.8 1.5 1.3 80.00 4.8 x 4.8 x 2
744042008 8.2 1.4 1.1 100.00 4.8 x 4.8 x 2
744043005 5.6 1.4 1.3 70.00 4.8 x 4.8 x 3
744043006 6.8 1.3 1.3 80.00 4.8 x 4.8 x 3
744043008 8.2 1.3 1.1 90.00 4.8 x 4.8 x 3
7440680068 6.8 1.4 1.2 127.00 8 x 8 x 1.2
7440680082 8.2 1.4 1.1 142.00 8 x 8 x 1.2
74479888247 4.7 1.0 0.7 380.00 2.5 x 2 x 1
74479889247 4.7 0.9 0.9 400.00 2.5 x 2 x 1.2
74479889268 6.8 0.8 0.7 500.00 2.5 x 2 x 1.2
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