AAT1149 Buck Converter overview



AAT1149 is a 5.50 V sync Buck Converter from with 0.40 A output current. The maximum 5.50 V input voltage can be regulated down into a 1.00 V to 5.50 V output voltage.

It requires are a typical inductor size of 1.80 µH, a typical external component count of 5 and achieves a peak efficiency of 98 %. Further AAT1149 characteristics are a fixed 3000 kHz switching frequency and 2 available package option(s): WLCSP-5 SC70-8 .

For the AAT1149 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.

Search Filter
V-IN min. 2.70 V
V-IN max. 5.50 V
I-OUT? 0.40 A
V-OUT min. 1.00 V
V-OUT max. 5.50 V
V-OUT adjustable V
V-OUT programmable yes
sync/non-sync sync
Frequency typ. 3000 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 70 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ. 140 °C
Inductor size typ. 1.80 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 98 %
Component count min. 5
current limit adjustable no
Nr.of packages 2
SC70 SC70-8

AAT1149 Datasheet

Link to the most up-to-date AAT1149 datasheet and the product page for EVM, tools and support information.


AAT1149 Sample stock and distributor price breaks

AAT1149 prices and online available distributors.


Available Distributors with stock: 0

no online Distributor with AAT1149 stock available

Available Distributors with stock: 0

no online Distributor with AAT1149 stock available

Available Distributors without stock: 2

Mouser Electronics

AAT1149AIUV-1.875-T1 0
30000.25 $
60000.24 $
90000.23 $
Buy Now
AAT1149BIUV-1.8-T1 0
30000.30 $
60000.29 $
90000.28 $
Buy Now
AAT1149IJS-0.6-T1 0 Buy Now
AAT1149IUV-0.6-T1 0 Buy Now

Richardson RFPD

AAT1149AIUV-1.875-T1 0
30000.28 $
50000.26 $
100000.24 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to AAT1149. Optional, compare AAT1149 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% AS1339 AS1339 product overviewAS1339 product overview AMS CSP-16
0% ADP2147-0,9-1,1 ADP2147-0,9-1,1 product overviewADP2147-0,9-1,1 product overview Analog Devices WLCSP-6
0% ADP2147-0,9-1,3 ADP2147-0,9-1,3 product overviewADP2147-0,9-1,3 product overview Analog Devices WLCSP-6
0% ADP2147-0,981-1,275 ADP2147-0,981-1,275 product overviewADP2147-0,981-1,275 product overview Analog Devices WLCSP-6
0% ADP2147-1,0-1,2 ADP2147-1,0-1,2 product overviewADP2147-1,0-1,2 product overview Analog Devices WLCSP-6
0% LTC3447 LTC3447 product overviewLTC3447 product overview Linear Technology DFN-10
0% MAX1572 MAX1572 product overviewMAX1572 product overview Maxim TQFN-12
0% MAX8581 MAX8581 product overviewMAX8581 product overview Maxim TDFN-EP-10
0% MAX8582 MAX8582 product overviewMAX8582 product overview Maxim TDFN-EP-10
0% MIC23051-0.95-1.25 MIC23051-0.95-1.25 product overviewMIC23051-0.95-1.25 product overview Micrel MLF-8
0% MIC23051-1.0-1.2 MIC23051-1.0-1.2 product overviewMIC23051-1.0-1.2 product overview Micrel MLF-8
0% SC195 SC195 product overviewSC195 product overview Semtech MLPQ-8
0% SC202A SC202A product overviewSC202A product overview Semtech MLPQ-13
0% AAT1142 AAT1142 product overviewAAT1142 product overview Skyworks TSOPJW-12, TDFN-12
0% AAT1171 AAT1171 product overviewAAT1171 product overview Skyworks TDFN-12, WLCSP-12
0% AAT2503 AAT2503 product overviewAAT2503 product overview Skyworks QFN-20
0% AAT2504 AAT2504 product overviewAAT2504 product overview Skyworks QFN-20
0% SKY87201 SKY87201 product overviewSKY87201 product overview Skyworks STDFN-8
0% TPS62270 TPS62270 product overviewTPS62270 product overview Texas Instruments SON-6
25% LTC3563 LTC3563 product overviewLTC3563 product overview Linear Technology DFN-6
25% MIC23051-1.15-1.40 MIC23051-1.15-1.40 product overviewMIC23051-1.15-1.40 product overview Micrel MLF-8
25% MIC23051-1.2-1.8 MIC23051-1.2-1.8 product overviewMIC23051-1.2-1.8 product overview Micrel MLF-8
25% DC6M502X6-1.2-1.5-A DC6M502X6-1.2-1.5-A product overviewDC6M502X6-1.2-1.5-A product overview NXP CSP-6
25% DC6M502X6-1.2-1.5-F DC6M502X6-1.2-1.5-F product overviewDC6M502X6-1.2-1.5-F product overview NXP CSP-6
25% DC6M502X6-1.2-1.8-A DC6M502X6-1.2-1.8-A product overviewDC6M502X6-1.2-1.8-A product overview NXP CSP-6
25% DC6M502X6-1.2-1.8-F DC6M502X6-1.2-1.8-F product overviewDC6M502X6-1.2-1.8-F product overview NXP CSP-6
25% LM2608 LM2608 product overviewLM2608 product overview Texas Instruments DSBGA-10
25% TPS62741 TPS62741 product overviewTPS62741 product overview Texas Instruments SON-12
25% TPS62743 TPS62743 product overviewTPS62743 product overview Texas Instruments DSBGA-8
25% TPS627451 TPS627451 product overviewTPS627451 product overview Texas Instruments WSON-12
25% TPS62746 TPS62746 product overviewTPS62746 product overview Texas Instruments WCSP-8
25% TPS62748 TPS62748 product overviewTPS62748 product overview Texas Instruments WCSP-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of AAT1149.

V-IN max. 5.5 V, I-OUT 0.4 A, V-OUT min. 1 V, Frequency typ. 3000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744028002 2.2 1.3 1.0 125.00 2.8 x 2.8 x 1.2
744030002 2.2 0.7 0.8 140.00 3.3 x 3.5 x 1.05
74479763215 1.5 0.9 0.5 230.00 1.6 x 0.8 x 0.95
74479775215 1.5 1.1 0.8 160.00 2 x 1.2 x 1.2
74479775222A 2.2 1.0 0.6 200.00 2 x 1.2 x 1.2
74479776215 1.5 1.3 0.8 110.00 2 x 1.6 x 1
74479776222A 2.2 1.3 0.6 110.00 2 x 1.6 x 1
74479787222A 2.2 1.8 0.7 85.00 2.5 x 2 x 1
74479887222A 2.2 1.4 0.8 140.00 2.5 x 2 x 1
Fresh Search
Replacement Search with
0% tolerance (0)
10% tolerance (0)
25% tolerance (0)
50% tolerance (0)
add to Compare
Last Tweets
Meet us at this weeks PCIM tradeshow in Nuremberg, Tue+Wed, Details under info@dcdcselector.com
With the help of #OEMsecrets we show for all Selectors and products worldwide distributor inventory and prices. https://t.co/udaDPmshky
Update for the DC/DC Buck-Boost Converter Selector with additional products, fresh equivalent suggestions and more: https://t.co/C8PXhcizYQ
Loading. Please wait.