R1275 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

R1275 is a 36.00 V sync Buck Converter from with 2.00 A output current. The maximum 36.00 V input voltage can be regulated down into a 3.30 V to 5.00 V output voltage.

It requires are a typical inductor size of 2.20 µH, a typical external component count of 19 and achieves a peak efficiency of 91 %. Further R1275 characteristics are a adjustable 2000 kHz switching frequency and 1 available package option(s): HSOP-18 .

For the R1275 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. 36.00 V
I-OUT? 2.00 A
V-OUT min. 3.30 V
V-OUT max. 5.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 2000 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 1800 kHz
Frequency adj./ ext.clock max 2200 kHz
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 1350 µA
Operating min. -40 °C
Operating max. 105 °C
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 160 °C
Inductor size typ. 2.20 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 91 %
Component count min. 19
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP HSOP-18
DIP
TO
DDPAK

R1275 Datasheet

Link to the most up-to-date R1275 datasheet and the product page for EVM, tools and support information.

R1275

R1275 Sample stock and distributor price breaks

R1275 prices and online available distributors.

OEMSecrets.com
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Available Distributors with stock: 2

Digi-Key (10)

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Penn Elcom (21)

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R1275/05UK25Buy Now
R1275/1UAK25Buy Now
R1275-1UAKLAZ25Buy Now
R1275/1UAS25Buy Now
R1275-1UASLAZ25Buy Now
R1275/1UK25Buy Now
R1275/2UAK25Buy Now
R1275-2UAKLAZ25Buy Now
R1275-2UASLAZ25Buy Now
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R1275/2UVK25Buy Now
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Available Distributors without stock: 2

Allied Electronics, Inc (0)

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TTI (0)

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Available Distributors with stock: 7

Digi-Key

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show stock=0hide stock=0

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List of equivalents and alternatives

The following DC/DC Buck Converter are similar to R1275. Optional, compare R1275 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3690 LT3690 product overviewLT3690 product overview Linear Technology QFN-26
0% LT8610 LT8610 product overviewLT8610 product overview Linear Technology MSOP-16
0% LT8611 LT8611 product overviewLT8611 product overview Linear Technology QFN-24
0% MP4473 MP4473 product overviewMP4473 product overview MPS QFN-20
0% MP4570 MP4570 product overviewMP4570 product overview MPS TSSOP-20
0% MPQ4473 MPQ4473 product overviewMPQ4473 product overview MPS QFN-20
0% MPQ4473-AEC1 MPQ4473-AEC1 product overviewMPQ4473-AEC1 product overview MPS QFN-20
0% MPQ4570 MPQ4570 product overviewMPQ4570 product overview MPS TSSOP-20
0% LM43602 LM43602 product overviewLM43602 product overview Texas Instruments HTSSOP-16
0% LM43602-Q1 LM43602-Q1 product overviewLM43602-Q1 product overview Texas Instruments HTSSOP-16
0% LM43603 LM43603 product overviewLM43603 product overview Texas Instruments HTSSOP-16
0% LM43603-Q1 LM43603-Q1 product overviewLM43603-Q1 product overview Texas Instruments HTSSOP-16
0% LM46002 LM46002 product overviewLM46002 product overview Texas Instruments HTSSOP-16
0% LM46002-Q1 LM46002-Q1 product overviewLM46002-Q1 product overview Texas Instruments HTSSOP-16
0% R1275 R1275 product overviewR1275 product overview Ricoh HSOP-18
50% ER3110 ER3110 product overviewER3110 product overview Altera DFN-12
50% LM43601 LM43601 product overviewLM43601 product overview Texas Instruments HTSSOP-16
50% LM43601-Q1 LM43601-Q1 product overviewLM43601-Q1 product overview Texas Instruments HTSSOP-16
50% LM46001 LM46001 product overviewLM46001 product overview Texas Instruments HTSSOP-16
50% LM46001-Q1 LM46001-Q1 product overviewLM46001-Q1 product overview Texas Instruments HTSSOP-16
50% ISL85410 ISL85410 product overviewISL85410 product overview Intersil DFN-12

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of R1275.

V-IN max. 36 V, I-OUT 2 A, V-OUT min. 3.3 V, Frequency typ. 2000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404042015 1.5 3.0 4.3 31.00 4 x 4 x 1.8
74404042022 2.2 2.2 3.4 42.00 4 x 4 x 1.8
74404052022 2.2 3.0 3.6 31.60 5 x 5 x 2
7440420018 1.8 2.4 2.4 40.00 4.8 x 4.8 x 2
7440430018 1.8 2.7 2.5 20.00 4.8 x 4.8 x 3
74405024015 1.5 2.1 3.5 60.00 2.5 x 2 x 1.2
74405031015 1.5 2.2 4.1 64.00 3 x 3 x 1.2
7440520018 1.8 2.6 3.0 30.00 5.8 x 5.8 x 2
744052002 2.5 2.4 2.7 20.00 5.8 x 5.8 x 2
744053002 2.6 3.0 2.7 20.00 5.8 x 5.8 x 3
74406042015 1.5 3.9 3.1 25.00 4.8 x 4.8 x 2
74406042022 2.2 3.4 2.7 33.00 4.8 x 4.8 x 2
7440620015 1.5 4.3 4.0 10.00 6.8 x 6.8 x 2.5
744062002 2.2 3.4 2.7 10.00 6.8 x 6.8 x 2.5
7440680017 1.7 2.5 2.4 41.00 8 x 8 x 1.2
7440690016 1.6 3.1 3.3 29.00 8 x 8 x 1.5
7440690022 2.2 2.8 2.9 35.00 8 x 8 x 1.5
7440700022 2.2 4.6 3.2 17.00 8 x 8 x 2
74408941022 2.2 2.1 3.6 66.08 4.8 x 4.8 x 2.1
74408942022 2.2 2.5 4.0 38.00 4.8 x 4.8 x 3
74408943022 2.2 3.0 4.6 26.00 4.8 x 4.8 x 4.1
74437321015 1.5 3.0 4.0 55.00 4.45 x 4.06 x 1.2
74437321022 2.2 2.2 4.8 69.20 4.45 x 4.06 x 1.2
74438324015 1.5 2.2 3.7 82.00 2.5 x 2 x 1.2
74438336015 1.5 3.7 4.5 33.00 3 x 3 x 2
74438336022 2.2 2.4 4.3 67.00 3 x 3 x 2
7447462022 2.2 6.3 4.3 10.00 5.5 x 5.5 x 8.5
744773018 1.8 2.7 3.6 28.00 4 x 4.5 x 3.48
744773022 2.2 2.5 3.4 34.00 4 x 4.5 x 3.48
744778002 2.2 4.0 4.8 14.00 7.3 x 7.3 x 3.4
7447785002 2.2 2.9 3.3 43.00 5.9 x 6.2 x 3.3
7447786002 2.2 3.5 4.0 40.00 5.9 x 6.2 x 5.1
7447789002 2.2 4.0 4.8 19.00 7.3 x 7.3 x 3.5
74479299222 2.2 2.1 3.5 85.00 3.2 x 2.5 x 1.2
78438324015 1.5 2.2 3.7 82.00 2.5 x 2 x 1.2
78438336015 1.5 3.7 4.5 33.00 3 x 3 x 2
78438336022 2.2 2.4 4.3 67.00 3 x 3 x 2
784773018 1.8 2.7 3.6 28.00 4 x 4.5 x 3.5
784773022 2.2 2.5 3.4 34.00 4 x 4.5 x 3.5
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