LT3519 LED Buck-Boost Driver overview

Description

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LT3519 is a 1 channel, 30.0 V, 0.10 A/string sync LED Buck-Boost Driver. It can drive a maximum of 8 LED (~3.5Vfwd) per string, features a fixed 400 kHz frequency and is available in 1 package option(s): MSOP-16 .

Further characteristics are a feedback voltage of 0.250 V, a typical inductor size of 68.0 uH and a peak efficiency of 88 %.

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 3.0 V
V-IN max. 30.0 V
V-OUT max. 30.0 V
Nr.of LED per string typ. 8
I-OUT/string? 0.10 A
current limit typ. 0.98 A
sync/non-sync sync
Frequency typ. 400 kHz
Frequency fixed
Frequency min.
Frequency max.
Softstart no
Softstart adjustable no
Down-Mode no
Quiescent current max. 3500 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 68.0 uH
feedback voltage 0.250 V
Automotive AEC-Q100 no
Topology Buck-Boost
Peak Efficiency 88 %
Component count min. 12
DC dimming yes
PWM dimming yes
PWM frequency min. 0.10 kHz
PWM frequency max. 1.0 kHz
digital dimming no
digital interface no
LED flash no
TxMask no
Nr.of current sources 1
Nr.of package options 1
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN
SO/SOIC
SOP
DIP

LT3519 Datasheet

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

LT3519

LT3519 inventory, samples and price

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Available Distributors with stock: 0

no online Distributor with LT3519 stock available

List with equivalents & alternatives

The following DC/DC LED Buck-Boost driver are similar to LT3519. Optional, compare LT3519 side-by-side with other LED driver via the comparison function.

Variation Compare Product Manufacturer Package
0% LT3519-1 LT3519-1 product overviewLT3519-1 product overview Linear Technology MSOP-16
0% LT3519-2 LT3519-2 product overviewLT3519-2 product overview Linear Technology MSOP-16

Inductor suggestions

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

V-IN min. 3 V, V-OUT max. 30 V, current limit typ. 0.98 A, Frequency typ. 400 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744311150 1.5 11.0 14.0 6.60 7 x 6.9 x 4
744313180 1.8 14.0 22.0 5.60 12.9 x 12.8 x 3.5
744313220 2.2 14.0 18.0 5.70 12.9 x 12.8 x 3.5
744314150 1.5 13.0 11.0 4.30 7 x 6.9 x 5
744323120 1.2 12.0 15.0 6.60 10.6 x 10.6 x 3.1
744323150 1.5 12.0 18.0 6.60 10.6 x 10.6 x 3.1
744325180 1.8 16.0 18.0 3.50 10.5 x 10.2 x 5
7443330220 2.2 16.5 22.0 4.60 10.9 x 10 x 9.7
7443340150 1.5 16.5 18.5 5.30 8.4 x 7.9 x 7.5
7443340220 2.2 16.5 12.5 5.30 8.4 x 7.9 x 7.5
7443551200 2.0 23.0 22.0 2.50 13.2 x 12.8 x 6.5
7443552150 1.5 14.0 17.0 5.30 10.5 x 10.2 x 4.2
7443552200 2.0 11.0 13.0 7.30 10.5 x 10.2 x 4.2
74437356015 1.5 10.6 21.0 8.30 8.64 x 8.5 x 3
74437358022 2.2 10.0 22.0 8.70 8.64 x 8.5 x 4
74477001 1.2 12.0 16.6 5.00 12 x 12 x 8
7447709002 2.2 11.5 20.0 4.90 12 x 12 x 10
744771001 1.5 10.5 12.5 4.00 12 x 12 x 6
744771002 2.2 10.0 11.0 5.00 12 x 12 x 6
7447714015 1.5 10.0 12.5 5.55 10 x 10 x 5
7447798180 1.8 14.5 12.8 3.80 10.2 x 10.2 x 6.4
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