LT3598 LED Boost Driver overview



LT3598 is a 6 channel, 30.0 V, 0.03 A/string non-sync LED Boost Driver. It can drive a maximum of 10 LED (~3.5Vfwd) per string, features a adjustable 2500 kHz frequency and is available in 2 package option(s): QFN-24 TSSOP-24 .

Further characteristics are a feedback voltage of 0.120 V, a typical inductor size of 10.0 uH and a peak efficiency of 90 %.

Parameter and features overview

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Nr. of Channel 6
V-IN min. 3.2 V
V-IN max. 30.0 V
V-OUT max. 44.0 V
Nr.of LED per string typ. 10
I-OUT/string? 0.03 A
current limit typ. 2.00 A
sync/non-sync non-sync
Frequency typ. 2500 kHz
Frequency adjustable
Frequency min. 190 kHz
Frequency max. 2500 kHz
Softstart yes
Softstart adjustable yes
Down-Mode yes
Quiescent current max. 5000 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 10.0 uH
feedback voltage 0.120 V
Automotive AEC-Q100 no
Topology Boost
Peak Efficiency 90 %
Component count min. 17
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 6
Nr.of package options 2

LT3598 Datasheet

Link to the most up-to-date LT3598 datasheet and the product page for EVM, tools and support information.


LT3598 inventory, samples and price

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List with equivalents & alternatives

The following DC/DC LED Boost driver are similar to LT3598. Optional, compare LT3598 side-by-side with other LED driver via the comparison function.

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Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3598.

V-IN min. 3.2 V, V-OUT max. 44 V, current limit typ. 2 A, Frequency typ. 2500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744302010 0.1 30.0 45.0 0.24 6.95 x 6.8 x 4.7
744303012 0.1 31.0 55.0 0.33 10 x 6.8 x 5
744307012 0.1 29.0 48.0 0.33 7.4 x 7.2 x 7.2
7443081012 0.1 38.0 85.0 0.29 9.4 x 6.2 x 8.1
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