LTC3490 LED Boost Driver overview

Description

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LTC3490 is a 1 channel, 3.2 V, 0.35 A/string sync LED Boost Driver. It can drive a maximum of 1 LED (~3.5Vfwd) per string, features a fixed 1300 kHz frequency and is available in 2 package option(s): DFN-8 S-8 .

Further characteristics are a feedback voltage of 0.000 V, a typical inductor size of 3.3 uH and a peak efficiency of 90 %.

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 1.0 V
V-IN max. 3.2 V
V-OUT max. 4.0 V
Nr.of LED per string typ. 1
I-OUT/string? 0.35 A
current limit typ. 2.00 A
sync/non-sync sync
Frequency typ. 1300 kHz
Frequency fixed
Frequency min.
Frequency max.
Softstart no
Softstart adjustable no
Down-Mode no
Quiescent current max. 1000 uA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ. 3.3 uH
feedback voltage
Automotive AEC-Q100 no
Topology Boost
Peak Efficiency 90 %
Component count min. 3
DC dimming no
PWM dimming no
PWM frequency min.
PWM frequency max.
digital dimming no
digital interface no
LED flash no
TxMask no
Nr.of current sources 1
Nr.of package options 2
CSP
SC70
SOT
MSOP
QFN/DFN DFN-8
SO/SOIC S-8
SOP
DIP

LTC3490 Datasheet

Link to the most up-to-date LTC3490 datasheet and the product page for EVM, tools and support information.

LTC3490

LTC3490 inventory, samples and price

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List with equivalents & alternatives

The following DC/DC LED Boost driver are similar to LTC3490. Optional, compare LTC3490 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 LTC3490.

V-IN min. 1 V, V-OUT max. 4 V, current limit typ. 2 A, Frequency typ. 1300 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74407000018 0.2 9.0 9.0 3.51 8 x 8 x 2
744373240022 0.2 9.5 17.0 6.60 4.45 x 4.06 x 2
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