LT3597 Buck LED driver IC overview

Description

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LT3597 is a non-sync DC/DC Buck LED driver IC from . Maximum input voltage is 60.0 V and it drives an output current of up to 0.10 A. Assuming a typical 3.5V LED forward voltage LT3597 can drive up to 10 LED in series.

The LED Buck driver IC features adjustable 1000 kHz switching frequency, a feedback voltage of 1.22 V and requires a typical inductor size of 100.0 uH. This combination results in a peak efficiency of ~80 %. LT3597 comes in 1 package option(s) - QFN-52 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 3
V-IN min. 6.0 V
V-IN max. 60.0 V
Nr.of LEDs max. 10
I-OUT? 0.10 A
MOSFET intern
ext.clock sync. yes
sync/non-sync non-sync
Frequency typ. 1000 kHz
Frequency adjustable adjustable
Frequency min. 200 kHz
Frequency max. 1000 kHz
Softstart yes
Softstart adjustable no
Quiescent current max. 6000 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size 100.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 1.22 V
Automotive AEC-Q100 no
Topology Buck
Peak Efficiency 80 %
Component count min. 31
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 1
SC70
SOT
MSOP
QFN/DFN QFN-52
SO/SOIC
SOP
DIP
TO
Variation
LED temperature compensation yes

LT3597 Datasheet

Link to the most up-to-date LT3597 datasheet and the product page for EVM, tools and support information.

LT3597

LT3597 inventory, samples and price

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Available Distributors with stock: 1

DIGI-KEY (2)

ProductStockPriceBuy
LT3597EUHG#PBF170
18.44 USD
255.64 USD
1004.80 USD
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DC1497A3
1150.75 USD
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LT3597EUHG#TRPBF0
25004.90 USD
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LT3597IUHG#PBF0
1355.51 USD
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LT3597IUHG#TRPBF0
25005.61 USD
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Available Distributors with stock: 1

Conrad Electronic

ProductStockPriceBuy
LT3597EUHG#PBF 99999999
110.60 €
1010.07 €
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Equivalents and alternatives

The following DC/DC LED Buck driver are similar to LT3597. Optional, compare LT3597 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 LT3597.

V-IN min. 6 V, V-IN max. 60 V, I-OUT 0.1 A, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744031101 100.0 0.3 0.2 1,930.00 3.8 x 3.8 x 1.8
744032101 100.0 0.1 0.3 5,200.00 3.2 x 2.5 x 2.3
74404041101 100.0 0.4 0.4 1,697.00 4 x 4 x 1.2
744042101 100.0 0.4 0.3 1,170.00 4.8 x 4.8 x 2
744043101 100.0 0.5 0.3 550.00 4.8 x 4.8 x 3
744043151 150.0 0.4 0.2 770.00 4.8 x 4.8 x 3
744062151 150.0 0.4 0.4 605.00 6.8 x 6.8 x 2.5
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