R1243-A-B Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

R1243-A-B is a 30.00 V non-sync Buck Converter from with 2.00 A output current. The maximum 30.00 V input voltage can be regulated down into a 0.80 V to 18.00 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 9 and achieves a peak efficiency of 95 %. Further R1243-A-B characteristics are a fixed 1000 kHz switching frequency and 2 available package option(s): DFN-10 HSOP-8 .

For the R1243-A-B 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. 30.00 V
I-OUT? 2.00 A
V-OUT min. 0.80 V
V-OUT max. 18.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 1000 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK no
Quiescent current max. 1000 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ. 160 °C
Inductor size typ. 4.70 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 95 %
Component count min. 9
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP
QFN/DFN DFN-10
SO/SOIC
SOP HSOP-8
DIP
TO
DDPAK

R1243-A-B Datasheet

Link to the most up-to-date R1243-A-B datasheet and the product page for EVM, tools and support information.

R1243-A-B

R1243-A-B Sample stock and distributor price breaks

R1243-A-B prices and online available distributors.

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Available Distributors with stock: 20

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List of equivalents and alternatives

The following DC/DC Buck Converter are similar to R1243-A-B. Optional, compare R1243-A-B side-by-side with other Buck Converter via the Comparison function.

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50% BD9328 BD9328 product overviewBD9328 product overview Rohm HTSOP-8
50% LM2590HV LM2590HV product overviewLM2590HV product overview Texas Instruments TO-263, TO-220-7
50% LM2590HV-AQ-Q1 LM2590HV-AQ-Q1 product overviewLM2590HV-AQ-Q1 product overview Texas Instruments TO-263, TO-220-7
50% LM2593HV LM2593HV product overviewLM2593HV product overview Texas Instruments TO-263, TO-220-7
50% LM2598 LM2598 product overviewLM2598 product overview Texas Instruments
50% LM2672 LM2672 product overviewLM2672 product overview Texas Instruments PDIP-8, SOIC-8, WSON-16
50% XC9246 XC9246 product overviewXC9246 product overview Torex USP-6, SOT26-6
50% XC9247 XC9247 product overviewXC9247 product overview Torex USP-6, SOT26-6
50% XC9250-3 XC9250-3 product overviewXC9250-3 product overview Torex SOP-8
50% XC9250-5 XC9250-5 product overviewXC9250-5 product overview Torex SOP-8
50% XC9251-3 XC9251-3 product overviewXC9251-3 product overview Torex SOP-8
50% XC9251-5 XC9251-5 product overviewXC9251-5 product overview Torex SOP-8
50% XC9270-C XC9270-C product overviewXC9270-C product overview Torex SOP-8
50% XC9270-D XC9270-D product overviewXC9270-D product overview Torex SOP-8
50% XC9271-C XC9271-C product overviewXC9271-C product overview Torex SOP-8
50% XC9271-D XC9271-D product overviewXC9271-D product overview Torex SOP-8
50% BD9E151 BD9E151 product overviewBD9E151 product overview Rohm VSON-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of R1243-A-B.

V-IN max. 30 V, I-OUT 2 A, V-OUT min. 0.8 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025001 1.2 2.6 3.0 36.00 2.8 x 2.8 x 3
74404024010 1.0 2.2 2.6 37.00 2.5 x 2 x 1.2
74404032010 1.0 2.2 3.0 33.00 3 x 3 x 1.5
74404041010 1.0 2.5 3.4 41.00 4 x 4 x 1.2
74404042010 1.0 3.2 4.8 27.00 4 x 4 x 1.8
74404042015 1.5 3.0 4.3 31.00 4 x 4 x 1.8
744042001 1.0 2.7 2.6 20.00 4.8 x 4.8 x 2
7440430012 1.2 3.1 2.8 15.00 4.8 x 4.8 x 3
7440520012 1.2 3.0 3.5 20.00 5.8 x 5.8 x 2
744062001 1.0 4.8 4.6 10.00 6.8 x 6.8 x 2.5
7440620015 1.5 4.3 4.0 10.00 6.8 x 6.8 x 2.5
7440680010 1.0 2.8 3.3 32.00 8 x 8 x 1.2
7440680017 1.7 2.5 2.4 41.00 8 x 8 x 1.2
7440690010 1.0 3.6 3.8 21.00 8 x 8 x 1.5
7440690016 1.6 3.1 3.3 29.00 8 x 8 x 1.5
7440700012 1.2 4.8 4.2 12.50 8 x 8 x 2
74437321015 1.5 3.0 4.0 55.00 4.45 x 4.06 x 1.2
74438323010 1.0 2.5 4.0 63.00 2.5 x 2 x 1
74438324012 1.2 2.4 4.5 67.00 2.5 x 2 x 1.2
74438324015 1.5 2.2 3.7 82.00 2.5 x 2 x 1.2
74438335010 1.0 2.7 4.5 39.00 3 x 3 x 1.5
74438336012 1.2 3.9 4.8 30.00 3 x 3 x 2
74438336015 1.5 3.7 4.5 33.00 3 x 3 x 2
7447785001 1.0 3.5 4.5 31.00 5.9 x 6.2 x 3.3
74479276210 1.0 2.0 2.5 65.00 2 x 1.6 x 1
74479276210C 1.0 2.1 3.1 53.00 2 x 1.25 x 1
74479287210 1.0 2.4 4.0 55.00 2.5 x 2 x 1
74479288210 1.0 2.4 4.2 40.00 2.5 x 2 x 1.2
74479298210 1.0 2.5 4.0 45.00 3.2 x 2.5 x 1
74479899210 1.0 2.3 2.5 50.00 3.2 x 2.6 x 1.2
78438323010 1.0 2.5 4.0 63.00 2.5 x 2 x 1
78438335010 1.0 2.7 4.5 39.00 3 x 3 x 1.5
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