RT8462 Buck (multi-topology) LED driver IC overview
Description
RT8462 is a non-sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 36.0 V and it drives an output current of up to 0.42 A. Assuming a typical 3.5V LED forward voltage RT8462 can drive up to 8 LED in series.
The LED Buck (multi-topology) driver IC features adjustable 800 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 ~95 %. RT8462 comes in 2 package option(s) - WQFN-16 SOP-14 .
Parameter and feature overview
Parameter | Value | Replacement Search Filter |
Nr. of Channel | 1 | |
V-IN min. | 4.5 V | |
V-IN max. | 36.0 V | |
Nr.of LEDs max. | 8 | |
I-OUT? | 0.42 A | |
MOSFET | extern | |
ext.clock sync. | ![]() |
|
sync/non-sync | non-sync | |
Frequency typ. | 800 kHz | |
Frequency adjustable | adjustable | |
Frequency min. | 250 kHz | |
Frequency max. | 800 kHz | |
Softstart | ![]() |
|
Softstart adjustable | ![]() |
|
Quiescent current max. | 7200 uA | |
Operating min. | ||
Operating max. | ||
Junction min. | -40 °C | |
Junction max. | 125 °C | |
thermal shutdown typ. | 145.0 °C | |
Inductor size | 22.0 uH | |
Inductor suggested by Würth Elektronik | ||
Feedback Voltage | 0.19 V | |
Automotive AEC-Q100 | ![]() |
|
Topology | Buck (multi-topology) | |
Peak Efficiency | 95 % | |
Component count min. | 13 | |
DC Dimming | ![]() |
|
PWM Dimming | ![]() |
|
digital dimming | ![]() |
|
Nr. of package options | 2 | |
SC70 | ||
SOT | ||
MSOP | ||
QFN/DFN | WQFN-16 | |
SO/SOIC | ||
SOP | SOP-14 | |
DIP | ||
TO | ||
Variation | ||
LED temperature compensation | ![]() |
RT8462 Datasheet
Link to the most up-to-date RT8462 datasheet and the product page for EVM, tools and support information.
RT8462 inventory, samples and price


Available Distributors with stock: 0
Available Distributors with stock: 0
Equivalents and alternatives
The following DC/DC LED Buck (multi-topology) driver are similar to RT8462. Optional, compare RT8462 side-by-side with other LED driver via the Comparison function.
Variation | Compare | Product | Manufacturer | Package | |
0% | MP4600 | ![]() |
MPS | QFN-10 | |
0% | RT8475 | ![]() |
Richtek | WQFN-16, SOP-14 | |
50% | MP4601 | ![]() |
MPS | SOIC-16, TSSOP-16 | |
50% | MP4603 | ![]() |
MPS | SOIC-16, TSSOP-16 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8462.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
744025220 | 22.0 | 0.5 | 0.8 | 525.00 | 2.8 x 2.8 x 3 | |
744025270 | 27.0 | 0.5 | 0.7 | 745.00 | 2.8 x 2.8 x 3 | |
74404024220 | 22.0 | 0.5 | 0.6 | 910.00 | 2.5 x 2 x 1.2 | |
74404032220 | 22.0 | 0.6 | 0.6 | 450.00 | 3 x 3 x 1.5 | |
74404032330 | 33.0 | 0.5 | 0.5 | 911.00 | 3 x 3 x 1.5 | |
74404041330 | 33.0 | 0.7 | 0.6 | 628.00 | 4 x 4 x 1.2 | |
74404042330 | 33.0 | 0.7 | 0.9 | 460.00 | 4 x 4 x 1.8 | |
744042220 | 22.0 | 0.9 | 0.6 | 280.00 | 4.8 x 4.8 x 2 | |
744043220 | 22.0 | 0.9 | 0.7 | 160.00 | 4.8 x 4.8 x 3 | |
744043270 | 27.0 | 0.9 | 0.6 | 170.00 | 4.8 x 4.8 x 3 | |
744043330 | 33.0 | 0.8 | 0.6 | 195.00 | 4.8 x 4.8 x 3 | |
744045220 | 22.0 | 0.6 | 1.0 | 560.00 | 4.5 x 3.2 x 2.9 | |
744045330 | 33.0 | 0.4 | 0.9 | 880.00 | 4.5 x 3.2 x 2.9 | |
744052220 | 22.0 | 0.8 | 0.9 | 240.00 | 5.8 x 5.8 x 2 | |
744052270 | 27.0 | 0.8 | 0.8 | 250.00 | 5.8 x 5.8 x 2 | |
744053220 | 22.0 | 1.2 | 0.9 | 100.00 | 5.8 x 5.8 x 3 | |
744053270 | 27.0 | 1.1 | 0.8 | 135.00 | 5.8 x 5.8 x 3 | |
744053330 | 33.0 | 0.9 | 0.8 | 180.00 | 5.8 x 5.8 x 3 | |
744062220 | 22.0 | 1.2 | 1.0 | 100.00 | 6.8 x 6.8 x 2.5 | |
744062330 | 33.0 | 0.9 | 0.8 | 150.00 | 6.8 x 6.8 x 2.5 | |
7440680220 | 22.0 | 0.9 | 0.7 | 350.00 | 8 x 8 x 1.2 | |
7440690220 | 22.0 | 1.0 | 0.9 | 272.00 | 8 x 8 x 1.5 | |
7440700220 | 22.0 | 1.3 | 1.0 | 166.00 | 8 x 8 x 2 | |
74408941330 | 33.0 | 0.5 | 0.9 | 1,015.00 | 4.8 x 4.8 x 2.1 | |
744773127 | 27.0 | 0.9 | 1.0 | 328.00 | 4 x 4.5 x 3.5 | |
744773133 | 33.0 | 0.9 | 0.9 | 370.00 | 4 x 4.5 x 3.5 | |
744773139 | 39.0 | 0.8 | 0.9 | 418.00 | 4 x 4.5 x 3.5 | |
784773127 | 27.0 | 0.9 | 1.0 | 328.00 | 4 x 4.5 x 3.5 | |
784773133 | 33.0 | 0.9 | 0.9 | 370.00 | 4 x 4.5 x 3.5 | |
784773139 | 39.0 | 0.8 | 0.9 | 418.00 | 4 x 4.5 x 3.5 |