LTM8042 Buck (multi-topology) LED driver IC overview



LTM8042 is a sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 30.0 V and it drives an output current of up to 1.00 A. Assuming a typical 3.5V LED forward voltage LTM8042 can drive up to 7 LED in series.

The LED Buck (multi-topology) driver IC features adjustable 1000 kHz switching frequency, a feedback voltage of 0.00 V and requires a typical inductor size of 0.0 uH. This combination results in a peak efficiency of ~95 %. LTM8042 comes in 1 package option(s) - LGA-10 .

Parameter and feature overview

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Nr. of Channel 1
V-IN min. 3.0 V
V-IN max. 30.0 V
Nr.of LEDs max. 7
I-OUT? 1.00 A
MOSFET intern
ext.clock sync. yes
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency adjustable adjustable
Frequency min. 250 kHz
Frequency max. 2000 kHz
Softstart yes
Softstart adjustable yes
Quiescent current max. -4200 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size 0.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.00 V
Automotive AEC-Q100 no
Topology Buck (multi-topology)
Peak Efficiency 95 %
Component count min. 4
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 1
Variation LGA-10
LED temperature compensation no

LTM8042 Datasheet

Link to the most up-to-date LTM8042 datasheet and the product page for EVM, tools and support information.


LTM8042 inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to LTM8042. Optional, compare LTM8042 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 LTM8042.

V-IN min. 3 V, V-IN max. 30 V, I-OUT 1 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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