AAT1151-2.5 Buck Converter overview
Description
AAT1151-2.5 is a 5.50 V sync Buck Converter from with 0.70 A output current. The maximum 5.50 V input voltage can be regulated down into a 2.50 V to 2.50 V output voltage.
It requires are a typical inductor size of 3.00 µH, a typical external component count of 5 and achieves a peak efficiency of 95 %. Further AAT1151-2.5 characteristics are a fixed 850 kHz switching frequency and 2 available package option(s): MSOP-8 QFN-16 .
Parameter overview and features with replacement search
For the AAT1151-2.5 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.
Parameter | Value | Replacement Search Filter |
V-IN min. | 2.70 V | |
V-IN max. | 5.50 V | |
I-OUT? | 0.70 A | |
V-OUT min. | 2.50 V | |
V-OUT max. | 2.50 V | |
V-OUT | 2.500 V | |
V-OUT programmable | ![]() |
|
sync/non-sync | sync | |
Frequency typ. | 850 kHz | |
Frequency | fixed | |
Frequency selectable | ||
ext.clock sync. | ![]() |
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Frequency adj./ ext.clock min. | ||
Frequency adj./ ext.clock max | ||
Softstart | ![]() |
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Softstart adjustable | ![]() |
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Tracking | ![]() |
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PG/Power OK | ![]() |
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Quiescent current max. | 300 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. | 3.00 µH | |
Inductor suggested by Würth Elektronik | ||
Automotive AEC-Q100 | ![]() |
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Light-Load-Mode | ![]() |
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Topology | Buck | |
Peak Efficiency | 95 % | |
Component count min. | 5 | |
current limit adjustable | ![]() |
|
Nr.of packages | 2 | |
CSP | ||
SC70 | ||
SOT | ||
MSOP | MSOP-8 | |
QFN/DFN | QFN-16 | |
SO/SOIC | ||
SOP | ||
DIP | ||
TO | ||
DDPAK |
AAT1151-2.5 Datasheet
Link to the most up-to-date AAT1151-2.5 datasheet and the product page for EVM, tools and support information.
AAT1151-2.5
AAT1151-2.5 Sample stock and distributor price breaks
AAT1151-2.5 prices and online available distributors.


Available Distributors with stock: 0
Available Distributors with stock: 0
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to AAT1151-2.5. Optional, compare AAT1151-2.5 side-by-side with other Buck Converter via the Comparison function.
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of AAT1151-2.5.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
744025004 | 4.7 | 1.4 | 1.7 | 100.00 | 2.8 x 2.8 x 3 | |
744025006 | 6.8 | 1.1 | 1.3 | 142.00 | 2.8 x 2.8 x 3 | |
744031004 | 4.7 | 1.2 | 0.9 | 90.00 | 3.8 x 3.8 x 1.8 | |
74404024047 | 4.7 | 1.1 | 1.2 | 175.00 | 2.5 x 2 x 1.2 | |
74404024068 | 6.8 | 0.9 | 1.0 | 300.00 | 2.5 x 2 x 1.2 | |
74404032047 | 4.7 | 1.3 | 1.2 | 96.00 | 3 x 3 x 1.5 | |
74404032068 | 6.8 | 1.2 | 0.9 | 120.00 | 3 x 3 x 1.5 | |
74404042068 | 6.8 | 1.5 | 1.8 | 98.00 | 4 x 4 x 1.8 | |
744042004 | 4.7 | 1.7 | 1.7 | 70.00 | 4.8 x 4.8 x 2 | |
744042005 | 5.6 | 1.6 | 1.4 | 80.00 | 4.8 x 4.8 x 2 | |
744042006 | 6.8 | 1.5 | 1.3 | 80.00 | 4.8 x 4.8 x 2 | |
744043004 | 4.7 | 1.6 | 1.7 | 50.00 | 4.8 x 4.8 x 3 | |
744043005 | 5.6 | 1.4 | 1.3 | 70.00 | 4.8 x 4.8 x 3 | |
744043006 | 6.8 | 1.3 | 1.3 | 80.00 | 4.8 x 4.8 x 3 | |
744045006 | 6.8 | 1.1 | 1.6 | 160.00 | 4.5 x 3.2 x 2.9 | |
744052005 | 5.0 | 1.7 | 1.8 | 50.00 | 5.8 x 5.8 x 2 | |
744052006 | 6.2 | 1.5 | 1.6 | 70.00 | 5.8 x 5.8 x 2 | |
744052007 | 7.5 | 1.4 | 1.5 | 70.00 | 5.8 x 5.8 x 2 | |
744053006 | 6.2 | 2.2 | 1.7 | 40.00 | 5.8 x 5.8 x 3 | |
744062006 | 6.2 | 1.9 | 1.8 | 40.00 | 6.8 x 6.8 x 2.5 | |
744062007 | 7.5 | 1.7 | 1.6 | 50.00 | 6.8 x 6.8 x 2.5 | |
7440680047 | 4.7 | 1.9 | 1.6 | 72.00 | 8 x 8 x 1.2 | |
7440680056 | 5.6 | 1.5 | 1.4 | 110.00 | 8 x 8 x 1.2 | |
7440680068 | 6.8 | 1.4 | 1.2 | 127.00 | 8 x 8 x 1.2 | |
7440690047 | 4.7 | 2.2 | 1.8 | 56.00 | 8 x 8 x 1.5 | |
7440690068 | 6.8 | 1.8 | 1.7 | 88.00 | 8 x 8 x 1.5 | |
7440700068 | 6.8 | 2.4 | 1.8 | 56.00 | 8 x 8 x 2 | |
74438323047 | 4.7 | 0.9 | 1.8 | 338.00 | 2.5 x 2 x 1 | |
74438323068 | 6.8 | 0.9 | 1.6 | 563.00 | 2.5 x 2 x 1 | |
74438324056 | 5.6 | 1.0 | 1.8 | 405.00 | 2.5 x 2 x 1.2 | |
74438324068 | 6.8 | 0.9 | 1.6 | 560.00 | 2.5 x 2 x 1.2 | |
74479889247 | 4.7 | 0.9 | 0.9 | 400.00 | 2.5 x 2 x 1.2 | |
78438323047 | 4.7 | 0.9 | 1.8 | 338.00 | 2.5 x 2 x 1 | |
78438323068 | 6.8 | 0.9 | 1.6 | 563.00 | 2.5 x 2 x 1 |