LT3474-1 Buck LED driver IC overview

Description

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Category
Sub-Category

LT3474-1 is a non-sync DC/DC Buck LED driver IC from . Maximum input voltage is 26.0 V and it drives an output current of up to 1.00 A. Assuming a typical 3.5V LED forward voltage LT3474-1 can drive up to 4 LED in series.

The LED Buck driver IC features adjustable 500 kHz switching frequency, a feedback voltage of 1.25 V and requires a typical inductor size of 10.0 uH. This combination results in a peak efficiency of ~88 %. LT3474-1 comes in 1 package option(s) - TSSOP-16 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 4.0 V
V-IN max. 26.0 V
Nr.of LEDs max. 4
I-OUT? 1.00 A
MOSFET intern
ext.clock sync. no
sync/non-sync non-sync
Frequency typ. 500 kHz
Frequency adjustable adjustable
Frequency min. 200 kHz
Frequency max. 2000 kHz
Softstart no
Softstart adjustable no
Quiescent current max. 4000 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size 10.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 1.25 V
Automotive AEC-Q100 no
Topology Buck
Peak Efficiency 88 %
Component count min. 6
DC Dimming no
PWM Dimming yes
digital dimming no
Nr. of package options 1
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP TSSOP-16
DIP
TO
Variation
LED temperature compensation no

LT3474-1 Datasheet

Link to the most up-to-date LT3474-1 datasheet and the product page for EVM, tools and support information.

LT3474-1

LT3474-1 inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck driver are similar to LT3474-1. Optional, compare LT3474-1 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% GT5304 GT5304 product overviewGT5304 product overview Giantec SOP-8, HSOP-8
0% GT5304H GT5304H product overviewGT5304H product overview Giantec SOP-8, HSOP-8
0% LT3474 LT3474 product overviewLT3474 product overview Linear Technology TSSOP-16
0% LT3517 LT3517 product overviewLT3517 product overview Linear Technology QFN-16, TSSOP-16
0% MP24183 MP24183 product overviewMP24183 product overview MPS QFN-10, SOIC-14
0% MP2487 MP2487 product overviewMP2487 product overview MPS SOIC-8
0% MP2488 MP2488 product overviewMP2488 product overview MPS QFN-10, SOIC-8
0% MP24830 MP24830 product overviewMP24830 product overview MPS QFN-14, SOIC-14
0% LM3404 LM3404 product overviewLM3404 product overview Texas Instruments SO-8, PSOP-8
0% LM3404HV LM3404HV product overviewLM3404HV product overview Texas Instruments SO-8, PSOP-8
0% LM3406 LM3406 product overviewLM3406 product overview Texas Instruments TSSOP-14
0% LM3406HV LM3406HV product overviewLM3406HV product overview Texas Instruments TSSOP-14
0% LM3406HV-Q1 LM3406HV-Q1 product overviewLM3406HV-Q1 product overview Texas Instruments TSSOP-14
0% LM3414 LM3414 product overviewLM3414 product overview Texas Instruments WSON-8, SOIC-8
0% LM3414HV LM3414HV product overviewLM3414HV product overview Texas Instruments WSON-8, SOIC-8
0% TPS92510 TPS92510 product overviewTPS92510 product overview Texas Instruments MSOP-10
0% TS19376CY5 TS19376CY5 product overviewTS19376CY5 product overview Taiwan Semi SOT89-5
0% TPS92513 TPS92513 product overviewTPS92513 product overview Texas Instruments MSOP-10
0% TPS92513HV TPS92513HV product overviewTPS92513HV product overview Texas Instruments MSOP-10
0% LC5710S LC5710S product overviewLC5710S product overview Sanken-Semi SOP-8
0% MBI6662 MBI6662 product overviewMBI6662 product overview Macroblock DFN-10, SOP-10
0% A6213-1 A6213-1 product overviewA6213-1 product overview Allegro SOIC-8
0% A6214 A6214 product overviewA6214 product overview Allegro SOIC-10
0% A6216 A6216 product overviewA6216 product overview Allegro TSSOP-16
25% PAM2842 PAM2842 product overviewPAM2842 product overview Diodes QFN-40, TSSOP-20
25% NCP3065 NCP3065 product overviewNCP3065 product overview ON Semiconductor DFN-8, SOIC-8
25% NCP3066 NCP3066 product overviewNCP3066 product overview ON Semiconductor DFN-8, SOIC-8
50% LT3592 LT3592 product overviewLT3592 product overview Linear Technology MSOP-10, QFN-10
50% LM3402 LM3402 product overviewLM3402 product overview Texas Instruments MSOP-8, PSOP-8
50% LM3402HV LM3402HV product overviewLM3402HV product overview Texas Instruments MSOP-8, PSOP-8
50% TPS92511 TPS92511 product overviewTPS92511 product overview Texas Instruments HSOP-8
50% ZLED7000 ZLED7000 product overviewZLED7000 product overview ZMDI SOT89-5

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3474-1.

V-IN min. 4 V, V-IN max. 26 V, I-OUT 1 A, Frequency typ. 500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404052220 22.0 1.2 1.4 225.00 5 x 5 x 2
74404054150 15.0 2.0 2.2 86.00 5 x 5 x 4
74404054220 22.0 1.5 1.7 129.00 5 x 5 x 4
74404063150 15.0 1.5 1.9 125.00 6 x 6 x 2.8
74404063220 22.0 1.4 1.6 140.00 6 x 6 x 2.8
74404064180 18.0 1.9 2.4 81.00 6 x 6 x 4.5
74404064220 22.0 1.8 2.2 89.00 6 x 6 x 4.5
744065150 15.0 2.2 2.3 69.00 10 x 10 x 3.1
744065220 22.0 1.8 1.9 104.00 10 x 10 x 3.1
744066220 22.0 2.5 2.3 55.80 10 x 10 x 4.1
7440700150 15.0 1.7 1.3 117.00 8 x 8 x 2
744071150 15.0 2.8 2.3 46.00 8 x 8 x 4.6
744071220 22.0 2.3 1.9 65.00 8 x 8 x 4.6
74408942150 15.0 1.1 1.6 207.00 4.8 x 4.8 x 3.1
74408943150 15.0 1.4 1.7 118.00 4.8 x 4.8 x 4.1
74408943220 22.0 1.1 1.4 185.00 4.8 x 4.8 x 4.1
74437324150 15.0 1.2 2.1 325.00 4.45 x 4.06 x 2
74437324220 22.0 1.0 2.0 470.00 4.45 x 4.06 x 2
7447462220 22.0 1.8 1.7 102.00 5.5 x 5.5 x 8.5
744773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
744773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
744773122 22.0 1.0 1.2 261.00 4 x 4.5 x 3.5
744775115 15.0 1.9 2.2 43.90 7 x 7.8 x 5.5
744775118 18.0 1.9 2.1 52.60 7 x 7.8 x 5.5
744775122 22.0 1.8 1.8 65.40 7 x 7.8 x 5.5
744776118 18.0 2.4 2.4 42.80 9 x 10 x 5.9
744776122 22.0 2.0 2.1 51.10 9 x 10 x 5.9
744777115 15.0 1.6 2.2 70.00 7.3 x 7.3 x 4.5
744777118 18.0 1.5 2.1 80.00 7.3 x 7.3 x 4.5
744777122 22.0 1.4 1.7 90.00 7.3 x 7.3 x 4.5
7447779115 15.0 1.6 2.2 70.00 7.3 x 7.3 x 4.5
7447779118 18.0 1.5 2.1 80.00 7.3 x 7.3 x 4.5
7447779122 22.0 1.4 1.7 90.00 7.3 x 7.3 x 4.5
744778115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.4
744778118 18.0 1.4 1.7 114.00 7.3 x 7.3 x 3.4
744778122 22.0 1.4 1.4 119.00 7.3 x 7.3 x 3.4
7447785115 15.0 1.6 1.4 165.00 5.9 x 6.2 x 3.3
7447786122 22.0 2.0 1.3 98.00 5.9 x 6.2 x 5.1
7447789115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.5
7447789118 18.0 1.4 1.7 114.00 7.3 x 7.3 x 3.5
7447789122 22.0 1.4 1.4 119.00 7.3 x 7.3 x 3.5
744787150 15.0 2.3 2.1 52.00 7.8 x 7 x 5
744787180 18.0 2.2 1.9 67.00 7.8 x 7 x 5
744787220 22.0 1.8 1.7 88.00 7.8 x 7 x 5
784773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
784773118 18.0 1.1 1.3 225.00 4 x 4.5 x 3.5
784773122 22.0 1.0 1.2 261.00 4 x 4.5 x 3.5
784774115 15.0 1.5 1.9 89.00 5.2 x 5.8 x 4.85
784774118 18.0 1.5 1.7 104.00 5.2 x 5.8 x 4.85
784774122 22.0 1.3 1.5 109.00 5.2 x 5.8 x 4.85
784775115 15.0 1.9 2.2 44.00 7 x 7.8 x 5.5
784775118 18.0 1.9 2.1 53.00 7 x 7.8 x 5.5
784775122 22.0 1.8 1.8 65.00 7 x 7.8 x 5.5
784776118 18.0 2.4 2.4 43.00 9 x 10 x 5.9
784776122 22.0 2.0 2.1 51.00 9 x 10 x 5.9
784777220 22.0 1.4 1.8 180.00 7.3 x 7.3 x 4.3
784778220 22.0 1.6 1.6 156.00 7.3 x 7.3 x 3.5
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