LM2840Y Buck Converter overview

Description

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LM2840Y 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 LM2840Y characteristics are a fixed 1250 kHz switching frequency and 1 available package option(s): SOT23-6 .

For the LM2840Y 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.

ParameterValueReplacement
Search Filter
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. 1250 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 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 90 %
Component count min. 7
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT SOT23-6
MSOP
QFN/DFN
SO/SOIC
SOP
DIP
TO
DDPAK

LM2840Y Datasheet

Link to the most up-to-date LM2840Y datasheet and the product page for EVM, tools and support information.

LM2840Y

LM2840Y Sample stock and distributor price breaks

LM2840Y prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LM2840Y stock available

Available Distributors with stock: 0

no online Distributor with LM2840Y stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LM2840Y. Optional, compare LM2840Y side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LM2840X LM2840X product overviewLM2840X product overview Texas Instruments SOT23-6
0% LM2840X-Q1 LM2840X-Q1 product overviewLM2840X-Q1 product overview Texas Instruments SOT23-6
0% LM2840Y-Q1 LM2840Y-Q1 product overviewLM2840Y-Q1 product overview Texas Instruments SOT23-6
50% LT1934-1 LT1934-1 product overviewLT1934-1 product overview Linear Technology DFN-6, TSOT23-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LM2840Y.

V-IN max. 42 V, I-OUT 0.1 A, V-OUT min. 0.8 V, Frequency typ. 1250 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025270 27.0 0.5 0.7 745.00 2.8 x 2.8 x 3
744031150 15.0 0.6 0.5 255.00 3.8 x 3.8 x 1.8
744031220 22.0 0.5 0.4 410.00 3.8 x 3.8 x 1.8
744032150 15.0 0.3 0.7 800.00 3.2 x 2.5 x 2.3
744032180 18.0 0.2 0.7 880.00 3.2 x 2.5 x 2.3
744032220 22.0 0.2 0.6 1,040.00 3.2 x 2.5 x 2.3
74404024180 18.0 0.5 0.7 830.00 2.5 x 2 x 1.2
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
744042180 18.0 0.9 0.7 270.00 4.8 x 4.8 x 2
744042220 22.0 0.9 0.6 280.00 4.8 x 4.8 x 2
744043180 18.0 1.0 0.7 150.00 4.8 x 4.8 x 3
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
7440680220 22.0 0.9 0.7 350.00 8 x 8 x 1.2
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