RT8453B Buck LED driver IC overview



RT8453B is a non-sync DC/DC Buck LED driver IC from . Maximum input voltage is 40.0 V and it drives an output current of up to 1.50 A. Assuming a typical 3.5V LED forward voltage RT8453B can drive up to 7 LED in series.

The LED Buck driver IC features fixed 500 kHz switching frequency, a feedback voltage of 0.19 V and requires a typical inductor size of 22.0 uH. This combination results in a peak efficiency of ~94 %. RT8453B comes in 1 package option(s) - SOP-8 .

Parameter and feature overview

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Nr. of Channel 1
V-IN min. 4.5 V
V-IN max. 40.0 V
Nr.of LEDs max. 7
I-OUT? 1.50 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. 6000 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 150.0 °C
Inductor size 22.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.19 V
Automotive AEC-Q100 no
Topology Buck
Peak Efficiency 94 %
Component count min. 9
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 1
LED temperature compensation no

RT8453B Datasheet

Link to the most up-to-date RT8453B datasheet and the product page for EVM, tools and support information.


RT8453B inventory, samples and price


Available Distributors with stock: 0

no online Distributor with RT8453B stock available

Available Distributors with stock: 2


RT8453BGSP 3726
10001.11 €
5001.40 €
2501.44 €
1001.65 €
252.06 €
102.19 €
12.43 €
Buy Now
RT8453BGSP 3726
10001.11 €
5001.40 €
2501.44 €
1001.65 €
252.06 €
102.19 €
12.43 €
Buy Now
RT8453BGSP 0
50001.00 €
25001.04 €
Buy Now
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RT8453BGSP 3726
121.79 CNY
1019.57 CNY
2518.46 CNY
10014.77 CNY
25012.92 CNY
50012.55 CNY
10009.97 CNY
Buy Now

Available Distributors without stock: 1

element14 Asia-Pacific

RT8453BGSP 0
10002.07 SGD
5002.49 SGD
2502.86 SGD
1003.04 SGD
253.57 SGD
103.78 SGD
14.20 SGD
Buy Now

Equivalents and alternatives

The following DC/DC LED Buck driver are similar to RT8453B. Optional, compare RT8453B 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% 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
25% GT5315 GT5315 product overviewGT5315 product overview Giantec SOT89-5, SOP-8
25% RT8470 RT8470 product overviewRT8470 product overview Richtek SOT23-5, SOP-8
50% PAM2861 PAM2861 product overviewPAM2861 product overview Diodes SOT23-5, SOT89-5
50% ZXLD1360 ZXLD1360 product overviewZXLD1360 product overview Diodes TSOT25-5
50% ZXLD1362 ZXLD1362 product overviewZXLD1362 product overview Diodes TSOT25-5
50% ZXLD1366 ZXLD1366 product overviewZXLD1366 product overview Diodes TSOT25-5, DFN-6, SO-8
50% MP2489 MP2489 product overviewMP2489 product overview MPS TSOT23-5, QFN-6
50% SD42525 SD42525 product overviewSD42525 product overview Silan Micro SOT23-6, SOP-8, SOT89-5
50% MP24895 MP24895 product overviewMP24895 product overview MPS TSOT23-5, QFN-6
50% MPQ2489 MPQ2489 product overviewMPQ2489 product overview MPS TSOT23-5, QFN-6
50% MPQ2489-AEC1 MPQ2489-AEC1 product overviewMPQ2489-AEC1 product overview MPS TSOT23-5, QFN-6
50% RT8472 RT8472 product overviewRT8472 product overview Richtek SOT23-5
50% RT8473 RT8473 product overviewRT8473 product overview Richtek SOT23-5
50% ZXLD1360Q ZXLD1360Q product overviewZXLD1360Q product overview Diodes TSOT25-5
50% ZXLD1362Q ZXLD1362Q product overviewZXLD1362Q product overview Diodes TSOT25-5
50% ZXLD1366Q ZXLD1366Q product overviewZXLD1366Q product overview Diodes TSOT25-5, DFN-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8453B.

V-IN min. 4.5 V, V-IN max. 40 V, I-OUT 1.5 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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