LT3591 LED Boost Driver overview

Description

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LT3591 is a 1 channel, 12.0 V, 0.02 A/string sync LED Boost Driver. It can drive a maximum of 10 LED (~3.5Vfwd) per string, features a fixed 1000 kHz frequency and is available in 1 package option(s): DFN-8 .

Further characteristics are a feedback voltage of 0.200 V, a typical inductor size of 22.0 uH and a peak efficiency of 78 %.

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 2.5 V
V-IN max. 12.0 V
V-OUT max. 42.0 V
Nr.of LED per string typ. 10
I-OUT/string? 0.02 A
current limit typ. 0.80 A
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency fixed
Frequency min.
Frequency max.
Softstart no
Softstart adjustable no
Down-Mode no
Quiescent current max. 5000 uA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ. 22.0 uH
feedback voltage 0.200 V
Automotive AEC-Q100 no
Topology Boost
Peak Efficiency 78 %
Component count min. 4
DC dimming yes
PWM dimming yes
PWM frequency min. 0.01 kHz
PWM frequency max. 10.0 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
QFN/DFN DFN-8
SO/SOIC
SOP
DIP

LT3591 Datasheet

Link to the most up-to-date LT3591 datasheet and the product page for EVM, tools and support information.

LT3591

LT3591 inventory, samples and price

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no online Distributor with LT3591 stock available

Available Distributors with stock: 0

no online Distributor with LT3591 stock available

List with equivalents & alternatives

The following DC/DC LED Boost driver are similar to LT3591. Optional, compare LT3591 side-by-side with other LED driver via the comparison function.

Variation Compare Product Manufacturer Package
25% LT3465 LT3465 product overviewLT3465 product overview Linear Technology TSOT23-6
25% LT3465A LT3465A product overviewLT3465A product overview Linear Technology TSOT23-6
50% LT3491 LT3491 product overviewLT3491 product overview Linear Technology DFN-6, SC70-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3591.

V-IN min. 2.5 V, V-OUT max. 42 V, current limit typ. 0.8 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744305033 0.3 28.0 26.0 0.16 13.5 x 13.3 x 5.2
744305040 0.4 28.0 20.0 0.16 13.5 x 13.3 x 5.2
744308033 0.3 27.0 30.0 0.37 10.1 x 7 x 7
744308040 0.4 25.0 26.0 0.37 10.1 x 7 x 7
7443081040 0.4 38.0 21.0 0.29 9.4 x 6.2 x 8.1
744310055 0.5 14.0 20.0 3.70 7 x 6.9 x 3.3
744311047 0.4 19.0 25.0 1.85 7 x 6.9 x 4
744314047 0.5 18.0 20.0 1.35 7 x 6.9 x 5
744316033 0.3 18.5 20.0 1.75 5.5 x 5.3 x 4.3
744316047 0.5 15.0 16.0 2.75 5.5 x 5.3 x 4.3
7443340047 0.5 19.0 32.0 2.65 8.4 x 7.9 x 7.5
744355256 0.6 20.0 30.0 1.61 10.5 x 10.2 x 4.2
744373770047 0.5 19.0 29.0 1.32 13.5 x 12.6 x 3.5
744373770056 0.6 18.5 28.0 1.40 13.5 x 12.6 x 3.5
74477009 0.5 23.5 26.4 2.90 12 x 12 x 8
7447798050 0.5 18.5 18.0 2.20 10.2 x 10.2 x 6.4
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