ACT8309 Buck Converter overview



ACT8309 is a 5.00 V sync Buck Converter from with 0.90 A output current. The maximum 5.00 V input voltage can be regulated down into a 0.80 V to 5.00 V output voltage.

It requires are a typical inductor size of 3.30 µH, a typical external component count of 6 and achieves a peak efficiency of 95 %. Further ACT8309 characteristics are a fixed 1350 kHz switching frequency and 1 available package option(s): TDFN-8 .

For the ACT8309 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. 5.00 V
I-OUT? 0.90 A
V-OUT min. 0.80 V
V-OUT max. 5.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 1350 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 yes
Quiescent current max. 310 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ. 3.30 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 95 %
Component count min. 6
current limit adjustable no
Nr.of packages 1

ACT8309 Datasheet

Link to the most up-to-date ACT8309 datasheet and the product page for EVM, tools and support information.


ACT8309 Sample stock and distributor price breaks

ACT8309 prices and online available distributors.

Available Distributors with stock: 0

no online Distributor with ACT8309 stock available

Available Distributors with stock: 0

no online Distributor with ACT8309 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to ACT8309. Optional, compare ACT8309 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% ACT8310 ACT8310 product overviewACT8310 product overview Active Semi TDFN-8
0% ACT8311 ACT8311 product overviewACT8311 product overview Active Semi TDFN-8
0% ADP2120 ADP2120 product overviewADP2120 product overview Analog Devices QFN-10
0% ISL80019 ISL80019 product overviewISL80019 product overview Intersil DFN-8
0% ISL80019A ISL80019A product overviewISL80019A product overview Intersil DFN-8
0% ISL9106 ISL9106 product overviewISL9106 product overview Intersil DFN-10
0% ISL9107 ISL9107 product overviewISL9107 product overview Intersil DFN-8
0% LTC1875 LTC1875 product overviewLTC1875 product overview Linear Technology TSSOP-16
0% LTC1879 LTC1879 product overviewLTC1879 product overview Linear Technology TSSOP-16
0% MP2158 MP2158 product overviewMP2158 product overview MPS QFN-8
0% MP2159 MP2159 product overviewMP2159 product overview MPS TSOT23-8
0% NCP6332 NCP6332 product overviewNCP6332 product overview ON Semiconductor WDFN-8
0% TLV62566 TLV62566 product overviewTLV62566 product overview Texas Instruments SOT23-5
0% TS30021 TS30021 product overviewTS30021 product overview Triune Systems QFN-16
0% MIC23156 MIC23156 product overviewMIC23156 product overview Micrel MLF-17, WLCSP-16
0% BD9A100MUV BD9A100MUV product overviewBD9A100MUV product overview Rohm VQFN-16
0% MP2159A MP2159A product overviewMP2159A product overview MPS TSOT23-8
10% LTC3606B LTC3606B product overviewLTC3606B product overview Linear Technology DFN-8
10% MAX1927 MAX1927 product overviewMAX1927 product overview Maxim u00b5MAX-10
10% BD9123MUV BD9123MUV product overviewBD9123MUV product overview Rohm QFN-16
10% AAT2503 AAT2503 product overviewAAT2503 product overview Skyworks QFN-20
10% AAT2504 AAT2504 product overviewAAT2504 product overview Skyworks QFN-20
10% TPS62160 TPS62160 product overviewTPS62160 product overview Texas Instruments SON-8
10% TPS62160-Q1 TPS62160-Q1 product overviewTPS62160-Q1 product overview Texas Instruments WSON-8
25% ISL8010 ISL8010 product overviewISL8010 product overview Intersil MSOP-10
25% LTC3447 LTC3447 product overviewLTC3447 product overview Linear Technology DFN-10
25% AAT2505 AAT2505 product overviewAAT2505 product overview Skyworks TDFN-12
25% LMR22007 LMR22007 product overviewLMR22007 product overview Texas Instruments DSBGA-9

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of ACT8309.

V-IN max. 5 V, I-OUT 0.9 A, V-OUT min. 0.8 V, Frequency typ. 1350 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744029002 2.2 1.5 1.2 88.00 2.8 x 2.8 x 1.5
744031001 1.5 1.8 1.6 40.00 3.8 x 3.8 x 1.8
74404024022 2.2 1.8 2.0 80.00 2.5 x 2 x 1.2
74404032022 2.2 1.8 1.7 50.00 3 x 3 x 1.5
74438322022 2.2 1.3 2.2 252.00 2.5 x 2 x 0.8
74479275222 2.2 1.3 1.7 166.00 2 x 1.25 x 1
74479276222 2.2 1.4 1.8 135.00 2 x 1.6 x 1
74479787215A 1.5 1.9 1.1 70.00 2.5 x 2 x 1
74479888222 2.2 1.2 1.4 200.00 2.5 x 2 x 1
74479889222 2.2 1.3 1.7 250.00 2.5 x 2 x 1.2
74479976215 1.5 1.6 1.9 100.00 2 x 1.6 x 0.5
78438322022 2.2 1.3 2.2 252.00 2.5 x 2 x 0.8
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