R1270S Buck Converter overview

Description

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R1270S is a 34.00 V non-sync Buck Converter from with 3.00 A output current. The maximum 34.00 V input voltage can be regulated down into a 0.80 V to 31.60 V output voltage.

It requires are a typical inductor size of 10.00 µH, a typical external component count of 10 and achieves a peak efficiency of 92 %. Further R1270S characteristics are a adjustable 2400 kHz switching frequency and 1 available package option(s): HSOP-18 .

For the R1270S 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. 3.60 V
V-IN max. 34.00 V
I-OUT? 3.00 A
V-OUT min. 0.80 V
V-OUT max. 31.60 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 2400 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 300 kHz
Frequency adj./ ext.clock max 2400 kHz
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. 1300 µA
Operating min. -40 °C
Operating max. 105 °C
Junction min.
Junction max.
thermal shutdown typ. 160 °C
Inductor size typ. 10.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 yes
Light-Load-Mode yes
Topology Buck
Peak Efficiency 92 %
Component count min. 10
current limit adjustable yes
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP HSOP-18
DIP
TO
DDPAK

R1270S Datasheet

Link to the most up-to-date R1270S datasheet and the product page for EVM, tools and support information.

R1270S

R1270S Sample stock and distributor price breaks

R1270S prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with R1270S stock available

Available Distributors with stock: 0

no online Distributor with R1270S stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to R1270S. Optional, compare R1270S side-by-side with other Buck Converter via the Comparison function.

no alternatives found

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of R1270S.

V-IN max. 34 V, I-OUT 3 A, V-OUT min. 0.8 V, Frequency typ. 2400 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74402500030 0.3 3.9 5.7 15.00 2.8 x 2.8 x 3
74402500047 0.5 3.3 4.7 19.00 2.8 x 2.8 x 3
744040410047 0.5 3.3 4.3 28.00 4 x 4 x 1.2
74404300033 0.3 4.0 6.0 8.00 4.8 x 4.8 x 3
74404300047 0.5 3.8 5.0 10.00 4.8 x 4.8 x 3
74407000047 0.5 7.8 6.5 5.80 8 x 8 x 2
744383230033 0.3 3.4 6.2 29.00 2.5 x 2 x 1
744383230047 0.5 3.2 5.5 37.00 2.5 x 2 x 1
744383240047 0.5 3.4 6.3 30.00 2.5 x 2 x 1.2
744383350047 0.5 4.6 5.8 20.00 3 x 3 x 1.5
74479287147 0.5 3.3 5.0 25.00 2.5 x 2 x 1
74479288147 0.5 3.1 6.0 28.00 2.5 x 2 x 1.2
74479298147 0.5 3.0 4.5 28.00 3.2 x 2.5 x 1
74479299147 0.5 3.6 6.3 25.00 3.2 x 2.5 x 1.2
74479976133 0.3 3.4 3.7 18.00 2 x 1.6 x 0.5
784383230033 0.3 3.4 6.2 29.00 2.5 x 2 x 1
784383230047 0.5 3.2 5.5 37.00 2.5 x 2 x 1
784383350047 0.5 4.6 5.8 20.00 3 x 3 x 1.5
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