ACT4533 Buck Converter overview
Description
ACT4533 is a 32.00 V non-sync Buck Converter from with 3.00 A output current. The maximum 32.00 V input voltage can be regulated down into a 0.82 V to 12.00 V output voltage.
It requires are a typical inductor size of 47.00 µH, a typical external component count of 11 and achieves a peak efficiency of 92 %. Further ACT4533 characteristics are a fixed 125 kHz switching frequency and 1 available package option(s): SOP-8EP .
Parameter overview and features with replacement search
For the ACT4533 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. | 10.00 V | |
V-IN max. | 32.00 V | |
I-OUT? | 3.00 A | |
V-OUT min. | 0.82 V | |
V-OUT max. | 12.00 V | |
V-OUT | adjustable V | |
V-OUT programmable | ![]() |
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sync/non-sync | non-sync | |
Frequency typ. | 125 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. | 1400 µA | |
Operating min. | -40 °C | |
Operating max. | 85 °C | |
Junction min. | -40 °C | |
Junction max. | 150 °C | |
thermal shutdown typ. | 150 °C | |
Inductor size typ. | 47.00 µH | |
Inductor suggested by Würth Elektronik | ||
Automotive AEC-Q100 | ![]() |
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Light-Load-Mode | ![]() |
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Topology | Buck | |
Peak Efficiency | 92 % | |
Component count min. | 11 | |
current limit adjustable | ![]() |
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Nr.of packages | 1 | |
CSP | ||
SC70 | ||
SOT | ||
MSOP | ||
QFN/DFN | ||
SO/SOIC | ||
SOP | SOP-8EP | |
DIP | ||
TO | ||
DDPAK |
ACT4533 Datasheet
Link to the most up-to-date ACT4533 datasheet and the product page for EVM, tools and support information.
ACT4533 Sample stock and distributor price breaks
ACT4533 prices and online available distributors.


Available Distributors with stock: 1
Digi-Key (9)
Product | Stock | Price | Buy | ||||||||||||||
ACT4533BYH-T | 4000 |
| Buy Now | ||||||||||||||
ACT4533BYH-T | 1582 |
| Buy Now | ||||||||||||||
ACT4533BYH-T | 0 |
| Buy Now | ||||||||||||||
ACT4533AYH-T | 0 |
| Buy Now | ||||||||||||||
ACT4533AYH-T | 4000 |
| Buy Now | ||||||||||||||
ACT4533AYH-T | 4000 |
| Buy Now | ||||||||||||||
ACT4533CYH-T | 0 |
| Buy Now | ||||||||||||||
ACT4533CYH-T | 3960 |
| Buy Now | ||||||||||||||
ACT4533CYH-T | 3960 |
| Buy Now | ||||||||||||||
EA4533AYH | 2 |
| Buy Now | ||||||||||||||
EA4533BYH | 3 |
| Buy Now | ||||||||||||||
EA4533CYH | 1 |
| Buy Now | ||||||||||||||
ACT4533YH-T | 0 |
| Buy Now | ||||||||||||||
ACT4533YH-T | 0 |
| Buy Now | ||||||||||||||
ACT4533YH-T | 0 |
| Buy Now | ||||||||||||||
EA4533YH | 0 |
| Buy Now |
Available Distributors without stock: 1
Rutronik (0)
Available Distributors with stock: 4
Arrow Electronics
Product | Stock | Price | Buy | ||||||||||||||||
ACT4533BYH-T | 4000 |
| Buy Now |
Digi-Key
Product | Stock | Price | Buy | ||||||||||||||
ACT4533BYH-T | 4000 |
| Buy Now | ||||||||||||||
ACT4533AYH-T | 4000 |
| Buy Now | ||||||||||||||
ACT4533AYH-T | 4000 |
| Buy Now | ||||||||||||||
ACT4533CYH-T | 3960 |
| Buy Now | ||||||||||||||
ACT4533CYH-T | 3960 |
| Buy Now | ||||||||||||||
ACT4533BYH-T | 1582 |
| Buy Now | ||||||||||||||
EA4533BYH | 3 |
| Buy Now | ||||||||||||||
EA4533AYH | 2 |
| Buy Now | ||||||||||||||
EA4533CYH | 1 |
| Buy Now | ||||||||||||||
ACT4533BYH-T | 0 | Buy Now | |||||||||||||||
ACT4533AYH-T | 0 |
| Buy Now | ||||||||||||||
ACT4533CYH-T | 0 |
| Buy Now | ||||||||||||||
ACT4533YH-T | 0 | Buy Now | |||||||||||||||
ACT4533YH-T | 0 | Buy Now | |||||||||||||||
ACT4533YH-T | 0 | Buy Now |
Mouser Electronics
Chip1Stop
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to ACT4533. Optional, compare ACT4533 side-by-side with other Buck Converter via the Comparison function.
Variation | Compare | Product | Manufacturer | Package | |
0% | ACT4523 | ![]() |
Active Semi | SOP-8EP | |
0% | ACT4523A | ![]() |
Active Semi | SOP-8EP | |
0% | ACT4533A | ![]() |
Active Semi | SOP-8EP | |
0% | ACT4533B | ![]() |
Active Semi | SOP-8EP | |
10% | ACT4303 | ![]() |
Active Semi | SOP-8 | |
50% | ACT4513 | ![]() |
Active Semi | SOP-8 | |
50% | ACT4514 | ![]() |
Active Semi | SOP-8 | |
50% | ACT4515 | ![]() |
Active Semi | SOP-8 | |
50% | LM22673 | ![]() |
Texas Instruments | TO263-7, SO-8 | |
50% | LM2673 | ![]() |
Texas Instruments | DDPAK-7, TO-220-7, VSON-14 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of ACT4533.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
74404064068 | 6.8 | 3.0 | 4.3 | 31.00 | 6 x 6 x 4.5 | |
74404084068 | 6.8 | 3.6 | 5.0 | 24.00 | 8 x 8 x 4.2 | |
74404084082 | 8.2 | 3.5 | 4.6 | 26.00 | 8 x 8 x 4.2 | |
7440650068 | 6.8 | 4.2 | 3.6 | 25.00 | 10 x 10 x 3.1 | |
7440660062 | 6.2 | 4.3 | 4.5 | 16.50 | 10 x 10 x 4.1 | |
744071056 | 5.6 | 4.0 | 4.0 | 20.00 | 8 x 8 x 4.6 | |
744314650 | 6.5 | 6.0 | 6.0 | 21.50 | 7 x 6.9 x 5 | |
744314760 | 7.6 | 4.2 | 4.8 | 30.20 | 7 x 6.9 x 5 | |
744314850 | 8.5 | 4.0 | 4.5 | 32.50 | 7 x 6.9 x 5 | |
744316560 | 5.6 | 4.5 | 4.6 | 28.50 | 5.5 x 5.3 x 4.3 | |
74437336056 | 5.6 | 3.0 | 6.0 | 55.00 | 5.7 x 5.2 x 3 | |
7447471068 | 6.8 | 6.4 | 5.0 | 11.90 | 10.5 x 10.5 x 11.5 | |
744771006 | 6.8 | 5.6 | 6.0 | 14.00 | 12 x 12 x 6 | |
744771008 | 8.2 | 6.3 | 6.3 | 14.00 | 12 x 12 x 6 | |
7447713082 | 8.2 | 3.0 | 4.7 | 41.00 | 10 x 10 x 3 | |
7447714056 | 5.6 | 6.0 | 7.2 | 12.00 | 10 x 10 x 5 | |
7447714068 | 6.8 | 5.2 | 5.8 | 18.50 | 10 x 10 x 5 | |
7447715006 | 6.8 | 4.3 | 4.7 | 20.00 | 12 x 12 x 4.5 | |
744772068 | 6.8 | 3.8 | 6.5 | 18.50 | 7.8 x 7.8 x 10 | |
7447797820 | 8.2 | 5.1 | 5.8 | 25.30 | 10.2 x 10.2 x 4.5 | |
7447798620 | 6.2 | 9.4 | 6.7 | 8.40 | 10.2 x 10.2 x 6.4 | |
7447798720 | 7.2 | 7.9 | 6.0 | 11.30 | 10.2 x 10.2 x 6.4 | |
7447798910 | 9.1 | 7.4 | 5.4 | 12.70 | 10.2 x 10.2 x 6.4 | |
784771068 | 6.8 | 5.5 | 6.0 | 18.00 | 12 x 12 x 8.3 | |
784771082 | 8.2 | 5.1 | 5.5 | 20.00 | 12 x 12 x 8.3 | |
784775056 | 5.6 | 4.0 | 4.0 | 18.00 | 7 x 7.8 x 5.5 | |
784775068 | 6.8 | 3.7 | 3.8 | 22.00 | 7 x 7.8 x 5.5 | |
784776056 | 5.6 | 4.8 | 5.5 | 15.00 | 9 x 10 x 5.9 | |
784776068 | 6.8 | 4.4 | 5.0 | 16.00 | 9 x 10 x 5.9 | |
784776082 | 8.2 | 4.2 | 4.3 | 20.00 | 9 x 10 x 5.9 |