RT8470 Buck LED driver IC overview

Description

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RT8470 is a non-sync DC/DC Buck LED driver IC from . Maximum input voltage is 30.0 V and it drives an output current of up to 1.20 A. Assuming a typical 3.5V LED forward voltage RT8470 can drive up to 7 LED in series.

The LED Buck driver IC features fixed 500 kHz switching frequency, a feedback voltage of 0.10 V and requires a typical inductor size of 33.0 uH. This combination results in a peak efficiency of ~97 %. RT8470 comes in 2 package option(s) - SOT23-5 SOP-8 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 7.0 V
V-IN max. 30.0 V
Nr.of LEDs max. 7
I-OUT? 1.20 A
MOSFET intern
ext.clock sync. no
sync/non-sync non-sync
Frequency typ. 500 kHz
Frequency adjustable fixed
Frequency min.
Frequency max.
Softstart yes
Softstart adjustable yes
Quiescent current max. -1000 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 150.0 °C
Inductor size 33.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.10 V
Automotive AEC-Q100 no
Topology Buck
Peak Efficiency 97 %
Component count min. 4
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 2
SC70
SOT SOT23-5
MSOP
QFN/DFN
SO/SOIC
SOP SOP-8
DIP
TO
Variation
LED temperature compensation no

RT8470 Datasheet

Link to the most up-to-date RT8470 datasheet and the product page for EVM, tools and support information.

RT8470

RT8470 inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck driver are similar to RT8470. Optional, compare RT8470 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% PAM2863 PAM2863 product overviewPAM2863 product overview Diodes PSOP-8
0% GT5315 GT5315 product overviewGT5315 product overview Giantec SOT89-5, SOP-8
0% RT8450 RT8450 product overviewRT8450 product overview Richtek WDFN-12, TSSOP-16
0% RT8450B RT8450B product overviewRT8450B product overview Richtek WDFN-12, TSSOP-16
0% RT8463 RT8463 product overviewRT8463 product overview Richtek WDFN-12, TSSOP-14
0% RT8453B RT8453B product overviewRT8453B product overview Richtek SOP-8
10% PAM2861 PAM2861 product overviewPAM2861 product overview Diodes SOT23-5, SOT89-5
10% ZXLD1360 ZXLD1360 product overviewZXLD1360 product overview Diodes TSOT25-5
10% ZXLD1362 ZXLD1362 product overviewZXLD1362 product overview Diodes TSOT25-5
10% ZXLD1366 ZXLD1366 product overviewZXLD1366 product overview Diodes TSOT25-5, DFN-6, SO-8
10% MP2489 MP2489 product overviewMP2489 product overview MPS TSOT23-5, QFN-6
10% SD42525 SD42525 product overviewSD42525 product overview Silan Micro SOT23-6, SOP-8, SOT89-5
10% MP24895 MP24895 product overviewMP24895 product overview MPS TSOT23-5, QFN-6
10% MPQ2489 MPQ2489 product overviewMPQ2489 product overview MPS TSOT23-5, QFN-6
10% MPQ2489-AEC1 MPQ2489-AEC1 product overviewMPQ2489-AEC1 product overview MPS TSOT23-5, QFN-6
10% RT8472 RT8472 product overviewRT8472 product overview Richtek SOT23-5
10% RT8473 RT8473 product overviewRT8473 product overview Richtek SOT23-5
10% ZXLD1360Q ZXLD1360Q product overviewZXLD1360Q product overview Diodes TSOT25-5
10% ZXLD1362Q ZXLD1362Q product overviewZXLD1362Q product overview Diodes TSOT25-5
10% ZXLD1366Q ZXLD1366Q product overviewZXLD1366Q product overview Diodes TSOT25-5, DFN-6
50% ZXLD1322 ZXLD1322 product overviewZXLD1322 product overview Diodes DFN-14

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8470.

V-IN min. 7 V, V-IN max. 30 V, I-OUT 1.2 A, Frequency typ. 500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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