LTC3490 LED Boost Driver overview
Description
Manufacturer
Category
Sub-Category
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
Parameter | Value | Replacement 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 | ![]() |
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Softstart adjustable | ![]() |
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Down-Mode | ![]() |
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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 | ![]() |
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Topology | Boost | |
Peak Efficiency | 90 % | |
Component count min. | 3 | |
DC dimming | ![]() |
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PWM dimming | ![]() |
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PWM frequency min. | ||
PWM frequency max. | ||
digital dimming | ![]() |
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digital interface | ![]() |
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LED flash | ![]() |
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TxMask | ![]() |
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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 inventory, samples and price


Available Distributors with stock: 0
no online Distributor with LTC3490 stock available
Available Distributors with stock: 0
no online Distributor with LTC3490 stock available
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.
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 |