AAT1143-1.8 Buck Converter overview



AAT1143-1.8 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 1.80 V to 1.80 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 3 and achieves a peak efficiency of 95 %. Further AAT1143-1.8 characteristics are a fixed 1000 kHz switching frequency and 1 available package option(s): SC70-8 .

For the AAT1143-1.8 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. 1.80 V
V-OUT max. 1.80 V
V-OUT 1.800 V
V-OUT programmable no
sync/non-sync 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 no
Tracking no
PG/Power OK no
Quiescent current max. 50 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. 4.70 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 95 %
Component count min. 3
current limit adjustable no
Nr.of packages 1
SC70 SC70-8

AAT1143-1.8 Datasheet

Link to the most up-to-date AAT1143-1.8 datasheet and the product page for EVM, tools and support information.


AAT1143-1.8 Sample stock and distributor price breaks

AAT1143-1.8 prices and online available distributors.


Available Distributors with stock: 0

no online Distributor with AAT1143 stock available

Available Distributors without stock: 1

Mouser-Electronics (0)

30000.22 USD
60000.22 USD
Buy Now

Available Distributors with stock: 0

no online Distributor with AAT1143 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to AAT1143-1.8. Optional, compare AAT1143-1.8 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% AS1334-1.8 AS1334-1.8 product overviewAS1334-1.8 product overview AMS DFN-8
0% ADP2102-1,8 ADP2102-1,8 product overviewADP2102-1,8 product overview Analog Devices QFN-8
0% ADP2108-1,8 ADP2108-1,8 product overviewADP2108-1,8 product overview Analog Devices TSOT23-5, CSP-5
0% ADP2109-1,8 ADP2109-1,8 product overviewADP2109-1,8 product overview Analog Devices CSP-5
0% ADP2121-1,8 ADP2121-1,8 product overviewADP2121-1,8 product overview Analog Devices CSP-6
0% ADP2138-1,8 ADP2138-1,8 product overviewADP2138-1,8 product overview Analog Devices WLCSP-6
0% ADP2139-1,8 ADP2139-1,8 product overviewADP2139-1,8 product overview Analog Devices WLCSP-6
0% AP6015-1.8 AP6015-1.8 product overviewAP6015-1.8 product overview Diodes MSOP-10
0% FAN5358-1,8 FAN5358-1,8 product overviewFAN5358-1,8 product overview Fairchild SC70-6
0% ISL9103-1.8 ISL9103-1.8 product overviewISL9103-1.8 product overview Intersil TDFN-6
0% ISL9103A-1.8 ISL9103A-1.8 product overviewISL9103A-1.8 product overview Intersil TDFN-6
0% ISL9104-1.8 ISL9104-1.8 product overviewISL9104-1.8 product overview Intersil TDFN-6
0% ISL9104A-1.8 ISL9104A-1.8 product overviewISL9104A-1.8 product overview Intersil TDFN-6
0% LTC3630-1.8 LTC3630-1.8 product overviewLTC3630-1.8 product overview Linear Technology DFN-16, MSOP-16
0% MAX1921-1.8 MAX1921-1.8 product overviewMAX1921-1.8 product overview Maxim SOT23-6
0% MAX1928-1.8 MAX1928-1.8 product overviewMAX1928-1.8 product overview Maxim u00b5MAX-10
0% MAX8640Y-1.8 MAX8640Y-1.8 product overviewMAX8640Y-1.8 product overview Maxim u00b5DFN-6
0% MAX8640Z-1.8 MAX8640Z-1.8 product overviewMAX8640Z-1.8 product overview Maxim u00b5DFN-6
0% MAX8884-1.8 MAX8884-1.8 product overviewMAX8884-1.8 product overview Maxim CSP-16
0% MIC23030-1.8 MIC23030-1.8 product overviewMIC23030-1.8 product overview Micrel MLF-6
0% MIC23031-1.8 MIC23031-1.8 product overviewMIC23031-1.8 product overview Micrel MLF-6
0% MIC23050-1.8 MIC23050-1.8 product overviewMIC23050-1.8 product overview Micrel MLF-8
0% MCP1602-1.8 MCP1602-1.8 product overviewMCP1602-1.8 product overview Microchip DFN-8, MSOP-8
0% DC6M401X6-1.8 DC6M401X6-1.8 product overviewDC6M401X6-1.8 product overview NXP CSP-6
0% DC6M501X6-1.8 DC6M501X6-1.8 product overviewDC6M501X6-1.8 product overview NXP CSP-6
0% DC6M503X6-1.8 DC6M503X6-1.8 product overviewDC6M503X6-1.8 product overview NXP CSP-6
0% DC6M601X6-1.8 DC6M601X6-1.8 product overviewDC6M601X6-1.8 product overview NXP CSP-6
0% DC6M603X6-1.8 DC6M603X6-1.8 product overviewDC6M603X6-1.8 product overview NXP CSP-6
0% AAT1123-1.8 AAT1123-1.8 product overviewAAT1123-1.8 product overview Skyworks SC70-8
0% AAT1141-1.8 AAT1141-1.8 product overviewAAT1141-1.8 product overview Skyworks SOT23-5
0% AAT1146-1.8 AAT1146-1.8 product overviewAAT1146-1.8 product overview Skyworks SOT23-5, SC70-8
0% AAT1149B-1.8 AAT1149B-1.8 product overviewAAT1149B-1.8 product overview Skyworks WLCSP-5
0% AAT1151-1.8 AAT1151-1.8 product overviewAAT1151-1.8 product overview Skyworks QFN-16, MSOP-8
0% AAT2749-1.8 AAT2749-1.8 product overviewAAT2749-1.8 product overview Skyworks CSP-9
0% ST1S12XX18 ST1S12XX18 product overviewST1S12XX18 product overview ST TSOT23-5
0% LM3671-1.8 LM3671-1.8 product overviewLM3671-1.8 product overview Texas Instruments USON-6, SOT23-5, DSBGA-5
0% LM3674-1.8 LM3674-1.8 product overviewLM3674-1.8 product overview Texas Instruments SOT23-5
0% LM3676-1.8 LM3676-1.8 product overviewLM3676-1.8 product overview Texas Instruments WSON-8
0% LM3677-1.8 LM3677-1.8 product overviewLM3677-1.8 product overview Texas Instruments USON-6, DSBGA-5
0% TPS62171 TPS62171 product overviewTPS62171 product overview Texas Instruments SON-8
0% TPS62222 TPS62222 product overviewTPS62222 product overview Texas Instruments TSOT23-5
0% TPS62231 TPS62231 product overviewTPS62231 product overview Texas Instruments SON-6
0% TPS62231-Q1 TPS62231-Q1 product overviewTPS62231-Q1 product overview Texas Instruments SON-6
0% TPS62261 TPS62261 product overviewTPS62261 product overview Texas Instruments SON-6, SOT-5
0% TPS62261-Q1 TPS62261-Q1 product overviewTPS62261-Q1 product overview Texas Instruments SON-6, SOT-5
0% TPS62303 TPS62303 product overviewTPS62303 product overview Texas Instruments SON-10, DSBGA-8
0% TPS62313 TPS62313 product overviewTPS62313 product overview Texas Instruments DSBGA-8
0% XC9244-1.8 XC9244-1.8 product overviewXC9244-1.8 product overview Torex USPN-6
0% XC9245-1.8 XC9245-1.8 product overviewXC9245-1.8 product overview Torex USPN-6
0% RP504x-1.8 RP504x-1.8 product overviewRP504x-1.8 product overview Ricoh DFN-6, SOT23-5
0% RP508x-1.8 RP508x-1.8 product overviewRP508x-1.8 product overview Ricoh DFN-6
0% TS30111-1.8 TS30111-1.8 product overviewTS30111-1.8 product overview Triune Systems QFN-16
0% TS33000-1.8 TS33000-1.8 product overviewTS33000-1.8 product overview Triune Systems QFN-16
0% TPS62562 TPS62562 product overviewTPS62562 product overview Texas Instruments SON-6
0% RP509Z-2-1.8 RP509Z-2-1.8 product overviewRP509Z-2-1.8 product overview Ricoh WLCSP-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of AAT1143-1.8.

V-IN max. 5.5 V, I-OUT 0.4 A, V-OUT min. 1.8 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744028006 6.8 0.8 0.6 325.00 2.8 x 2.8 x 1.2
744029006 6.8 0.8 0.7 250.00 2.8 x 2.8 x 1.5
744029100 10.0 0.7 0.5 390.00 2.8 x 2.8 x 1.5
744031006 6.8 0.9 0.8 135.00 3.8 x 3.8 x 1.8
744031100 10.0 0.7 0.6 185.00 3.8 x 3.8 x 1.8
74404024068 6.8 0.9 1.0 300.00 2.5 x 2 x 1.2
74404024100 10.0 0.5 0.9 435.00 2.5 x 2 x 1.2
74404032068 6.8 1.2 0.9 120.00 3 x 3 x 1.5
74404032100 10.0 0.8 0.9 230.00 3 x 3 x 1.5
74404041100 10.0 1.3 1.0 168.00 4 x 4 x 1.2
744042100 10.0 1.3 1.0 120.00 4.8 x 4.8 x 2
744043100 10.0 1.2 1.0 95.00 4.8 x 4.8 x 3
7440680100 10.0 1.2 1.0 177.00 8 x 8 x 1.2
74479889268 6.8 0.8 0.7 500.00 2.5 x 2 x 1.2
74479889310 10.0 0.8 0.5 500.00 2.5 x 2 x 1.2
Fresh Search
Replacement Search with
0% tolerance (0)
10% tolerance (0)
25% tolerance (0)
50% tolerance (0)
add to Compare
Last Tweets
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
Meet us at the Electronica Tradeshow in Munich, appointments under info@dcdcselector.com https://t.co/1uiualLN1x
Loading. Please wait.