LTC3453 Buck-Boost LED driver IC overview

Description

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LTC3453 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 0.50 A. Assuming a typical 3.5V LED forward voltage LTC3453 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 4.7 uH. This combination results in a peak efficiency of ~90 %. LTC3453 comes in 1 package option(s) - QFN-16 .

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? 0.50 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. 1000 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size 4.7 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-16
SO/SOIC
SOP
DIP
TO
Variation
LED temperature compensation no

LTC3453 Datasheet

Link to the most up-to-date LTC3453 datasheet and the product page for EVM, tools and support information.

LTC3453

LTC3453 inventory, samples and price

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Available Distributors with stock: 0

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Available Distributors with stock: 3

Digi-Key

ProductStockPriceBuy
LTC3453EUF#PBF 546
1002.05 €
252.62 €
13.94 €
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DC810A 1
2589.67 €
1119.07 €
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LTC3453EUF#TRPBF 0
25002.09 €
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Mouser Electronics

ProductStockPriceBuy
LTC3453EUF#PBF 263
13.80 $
103.48 $
502.69 $
2502.28 $
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LTC3453EUF#TRPBF 0
25002.79 $
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LTC3453EUF 0 Buy Now
LTC3453EUF#TR 0 Buy Now
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RS Components

ProductStockPriceBuy
LTC3453EUF#PBF 70
502.29 GBP
302.49 GBP
202.70 GBP
102.83 GBP
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Available Distributors without stock: 1

Richardson RFPD

ProductStockPriceBuy
LTC3453EUF#TRPBF 0
25002.43 $
50002.34 $
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LTC3453EUF#PBF 0
2732.49 $
5002.43 $
10002.37 $
50002.27 $
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Equivalents and alternatives

The following DC/DC LED Buck-Boost driver are similar to LTC3453. Optional, compare LTC3453 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3454 LTC3454 product overviewLTC3454 product overview Linear Technology QFN-10

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3453.

V-IN min. 2.7 V, V-IN max. 5.5 V, I-OUT 0.5 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025006 6.8 1.1 1.3 142.00 2.8 x 2.8 x 3
744029006 6.8 0.8 0.7 250.00 2.8 x 2.8 x 1.5
744031006 6.8 0.9 0.8 135.00 3.8 x 3.8 x 1.8
74404024068 6.8 0.9 1.0 300.00 2.5 x 2 x 1.2
74404032068 6.8 1.2 0.9 120.00 3 x 3 x 1.5
744042006 6.8 1.5 1.3 80.00 4.8 x 4.8 x 2
744042008 8.2 1.4 1.1 100.00 4.8 x 4.8 x 2
744043005 5.6 1.4 1.3 70.00 4.8 x 4.8 x 3
744043006 6.8 1.3 1.3 80.00 4.8 x 4.8 x 3
744043008 8.2 1.3 1.1 90.00 4.8 x 4.8 x 3
7440680068 6.8 1.4 1.2 127.00 8 x 8 x 1.2
7440680082 8.2 1.4 1.1 142.00 8 x 8 x 1.2
74479889268 6.8 0.8 0.7 500.00 2.5 x 2 x 1.2
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