LM2840X-Q1 Buck Converter overview



LM2840X-Q1 is a 42.00 V non-sync Buck Converter from with 0.10 A output current. The maximum 42.00 V input voltage can be regulated down into a 0.80 V to 34.00 V output voltage.

It requires are a typical inductor size of 15.00 µH, a typical external component count of 7 and achieves a peak efficiency of 90 %. Further LM2840X-Q1 characteristics are a fixed 550 kHz switching frequency and 1 available package option(s): SOT23-6 .

For the LM2840X-Q1 replacement search, please select a main parameter tolerance value and adjust the checkboxes for feature match. The product counter within the button shows the number of available equivalents and a click on the replacement button shows all possible replacements within a parametric overview.

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V-IN min. 4.50 V
V-IN max. 42.00 V
I-OUT? 0.10 A
V-OUT min. 0.80 V
V-OUT max. 34.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 550 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 1850 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 175 °C
Inductor size typ. 15.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 yes
Light-Load-Mode no
Topology Buck
Peak Efficiency 90 %
Component count min. 7
current limit adjustable no
Nr.of packages 1

LM2840X-Q1 Datasheet

Link to the most up-to-date LM2840X-Q1 datasheet and the product page for EVM, tools and support information.


LM2840X-Q1 Sample stock and distributor price breaks

LM2840X-Q1 prices and online available distributors.


Available Distributors with stock: 0

no online Distributor with LM2840X stock available

Available Distributors with stock: 0

no online Distributor with LM2840X stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LM2840X-Q1. Optional, compare LM2840X-Q1 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LM2840Y-Q1 LM2840Y-Q1 product overviewLM2840Y-Q1 product overview Texas Instruments SOT23-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LM2840X-Q1.

V-IN max. 42 V, I-OUT 0.1 A, V-OUT min. 0.8 V, Frequency typ. 550 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744031470 47.0 0.4 0.3 940.00 3.8 x 3.8 x 1.8
74404024470 47.0 0.3 0.4 1,600.00 2.5 x 2 x 1.2
74404032470 47.0 0.4 0.4 1,050.00 3 x 3 x 1.5
744042470 47.0 0.6 0.5 540.00 4.8 x 4.8 x 2
744043390 39.0 0.8 0.5 215.00 4.8 x 4.8 x 3
744043470 47.0 0.8 0.5 250.00 4.8 x 4.8 x 3
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