LT3952 Buck LED driver IC overview



LT3952 is a non-sync DC/DC Buck LED driver IC from . Maximum input voltage is 42.0 V and it drives an output current of up to 4.00 A. Assuming a typical 3.5V LED forward voltage LT3952 can drive up to 10 LED in series.

The LED Buck driver IC features adjustable 1500 kHz switching frequency, a feedback voltage of 0.25 V and requires a typical inductor size of 4.7 uH. This combination results in a peak efficiency of ~95 %. LT3952 comes in 1 package option(s) - TSSOP-28 .

Parameter and feature overview

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Nr. of Channel 1
V-IN min. 3.0 V
V-IN max. 42.0 V
Nr.of LEDs max. 10
I-OUT? 4.00 A
MOSFET extern
ext.clock sync. yes
sync/non-sync non-sync
Frequency typ. 1500 kHz
Frequency adjustable adjustable
Frequency min. 200 kHz
Frequency max. 3000 kHz
Softstart yes
Softstart adjustable yes
Quiescent current max. 2200 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ.
Inductor size 4.7 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.25 V
Automotive AEC-Q100 no
Topology Buck
Peak Efficiency 95 %
Component count min. 15
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 1
LED temperature compensation

LT3952 Datasheet

Link to the most up-to-date LT3952 datasheet and the product page for EVM, tools and support information.


LT3952 inventory, samples and price

Available Distributors with stock: 0

no online Distributor with LT3952 stock available

Available Distributors with stock: 0

no online Distributor with LT3952 stock available

Equivalents and alternatives

The following DC/DC LED Buck driver are similar to LT3952. Optional, compare LT3952 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% LM3424 LM3424 product overviewLM3424 product overview Texas Instruments HTSSOP-20
0% LM3424-Q1 LM3424-Q1 product overviewLM3424-Q1 product overview Texas Instruments HTSSOP-20
0% TPS92691 TPS92691 product overviewTPS92691 product overview Texas Instruments HTSSOP-16
0% TPS92691-Q1 TPS92691-Q1 product overviewTPS92691-Q1 product overview Texas Instruments HTSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3952.

V-IN min. 3 V, V-IN max. 42 V, I-OUT 4 A, Frequency typ. 1500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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