LTC3454 Buck-Boost LED driver IC overview

Description

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LTC3454 is a sync DC/DC Buck-Boost LED driver IC from . Maximum input voltage is 5.5 V and it drives an output current of up to 1.00 A. Assuming a typical 3.5V LED forward voltage LTC3454 can drive up to 1 LED in series.

The LED Buck-Boost driver IC features fixed 1000 kHz switching frequency, a feedback voltage of 0.80 V and requires a typical inductor size of 5.0 uH. This combination results in a peak efficiency of ~90 %. LTC3454 comes in 1 package option(s) - QFN-10 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 2.7 V
V-IN max. 5.5 V
Nr.of LEDs max. 1
I-OUT? 1.00 A
MOSFET intern
ext.clock sync. no
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency adjustable fixed
Frequency min.
Frequency max.
Softstart yes
Softstart adjustable no
Quiescent current max. 1200 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size 5.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.80 V
Automotive AEC-Q100 no
Topology Buck-Boost
Peak Efficiency 90 %
Component count min. 6
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 1
SC70
SOT
MSOP
QFN/DFN QFN-10
SO/SOIC
SOP
DIP
TO
Variation
LED temperature compensation no

LTC3454 Datasheet

Link to the most up-to-date LTC3454 datasheet and the product page for EVM, tools and support information.

LTC3454

LTC3454 inventory, samples and price

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Available Distributors with stock: 0

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Equivalents and alternatives

The following DC/DC LED Buck-Boost driver are similar to LTC3454. Optional, compare LTC3454 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 LTC3454.

V-IN min. 2.7 V, V-IN max. 5.5 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)
744025003 3.3 1.5 1.8 85.00 2.8 x 2.8 x 3
744025004 4.7 1.4 1.7 100.00 2.8 x 2.8 x 3
74404024033 3.3 1.4 1.3 120.00 2.5 x 2 x 1.2
74404024047 4.7 1.1 1.2 175.00 2.5 x 2 x 1.2
74404032033 3.3 1.5 1.5 70.00 3 x 3 x 1.5
74404032047 4.7 1.3 1.2 96.00 3 x 3 x 1.5
74404041033 3.3 1.8 2.1 69.00 4 x 4 x 1.2
74404041047 4.7 1.6 1.9 91.00 4 x 4 x 1.2
74404042047 4.7 1.7 2.2 70.00 4 x 4 x 1.8
7440420027 2.7 2.0 2.2 47.00 4.8 x 4.8 x 2
744042003 3.3 2.0 1.8 50.00 4.8 x 4.8 x 2
7440420039 3.9 1.8 1.7 60.00 4.8 x 4.8 x 2
744042004 4.7 1.7 1.7 70.00 4.8 x 4.8 x 2
7440430027 2.7 2.4 2.0 25.00 4.8 x 4.8 x 3
744043003 3.3 2.2 1.8 30.00 4.8 x 4.8 x 3
7440430039 3.9 1.7 1.7 50.00 4.8 x 4.8 x 3
744043004 4.7 1.6 1.7 50.00 4.8 x 4.8 x 3
744045004 4.7 1.2 2.0 120.00 4.5 x 3.2 x 2.9
744052003 3.0 2.2 2.4 40.00 5.8 x 5.8 x 2
7440520039 3.9 2.0 2.1 50.00 5.8 x 5.8 x 2
744053004 4.2 2.5 2.2 30.00 5.8 x 5.8 x 3
7440530047 4.7 2.4 2.0 30.00 5.8 x 5.8 x 3
7440680027 2.7 2.2 1.9 52.00 8 x 8 x 1.2
7440680033 3.3 2.0 1.8 61.00 8 x 8 x 1.2
7440680047 4.7 1.9 1.6 72.00 8 x 8 x 1.2
7440690033 3.3 2.6 2.3 42.00 8 x 8 x 1.5
7440690047 4.7 2.2 1.8 56.00 8 x 8 x 1.5
7440700047 4.7 3.0 2.2 37.00 8 x 8 x 2
74438323033 3.3 1.3 2.1 220.00 2.5 x 2 x 1
74438324047 4.7 1.0 2.1 300.00 2.5 x 2 x 1.2
74479889233 3.3 1.3 1.3 250.00 2.5 x 2 x 1.2
78438323033 3.3 1.3 2.1 220.00 2.5 x 2 x 1
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