SP6669-1.8 Buck Converter overview
Description
SP6669-1.8 is a 5.50 V sync Buck Converter from with 0.60 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 4 and achieves a peak efficiency of 94 %. Further SP6669-1.8 characteristics are a fixed 1500 kHz switching frequency and 1 available package option(s): SOT23-5 .
Parameter overview and features with replacement search
For the SP6669-1.8 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.
Parameter | Value | Replacement Search Filter |
V-IN min. | 2.50 V | |
V-IN max. | 5.50 V | |
I-OUT? | 0.60 A | |
V-OUT min. | 1.80 V | |
V-OUT max. | 1.80 V | |
V-OUT | 1.800 V | |
V-OUT programmable | ![]() |
|
sync/non-sync | sync | |
Frequency typ. | 1500 kHz | |
Frequency | fixed | |
Frequency selectable | ||
ext.clock sync. | ![]() |
|
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. | 340 µA | |
Operating min. | -40 °C | |
Operating max. | 85 °C | |
Junction min. | ||
Junction max. | 125 °C | |
thermal shutdown typ. | ||
Inductor size typ. | 4.70 µH | |
Inductor suggested by Würth Elektronik | ||
Automotive AEC-Q100 | ![]() |
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Light-Load-Mode | ![]() |
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Topology | Buck | |
Peak Efficiency | 94 % | |
Component count min. | 4 | |
current limit adjustable | ![]() |
|
Nr.of packages | 1 | |
CSP | ||
SC70 | ||
SOT | SOT23-5 | |
MSOP | ||
QFN/DFN | ||
SO/SOIC | ||
SOP | ||
DIP | ||
TO | ||
DDPAK |
SP6669-1.8 Datasheet
Link to the most up-to-date SP6669-1.8 datasheet and the product page for EVM, tools and support information.
SP6669-1.8 Sample stock and distributor price breaks
SP6669-1.8 prices and online available distributors.


Available Distributors with stock: 2
DIGI-KEY (3)
Product | Stock | Price | Buy | ||||||||||||||
SP6669AEK-L/TRR3 | 3000 |
| Buy Now | ||||||||||||||
SP6669AEK-L/TRR3 | 5271 |
| Buy Now | ||||||||||||||
SP6669AEK-L/TRR3 | 5271 |
| Buy Now | ||||||||||||||
SP6669DEK-L/TRR3 | 0 |
| Buy Now | ||||||||||||||
SP6669EB | 0 |
| Buy Now | ||||||||||||||
SP6669BEK-L/TRR3 | 0 |
| Buy Now | ||||||||||||||
SP6669CEK-L/TRR3 | 0 |
| Buy Now | ||||||||||||||
IC-744721 | 0 |
| Buy Now |
Mouser-Electronics (3)
Available Distributors without stock: 2
FUTURE (0)
NEWARK (0)
Available Distributors with stock: 0
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to SP6669-1.8. Optional, compare SP6669-1.8 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 SP6669-1.8.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
744028003 | 3.3 | 1.0 | 0.9 | 185.00 | 2.8 x 2.8 x 1.2 | |
744029003 | 3.3 | 1.3 | 1.0 | 110.00 | 2.8 x 2.8 x 1.5 | |
744029004 | 4.7 | 1.0 | 0.8 | 170.00 | 2.8 x 2.8 x 1.5 | |
744030003 | 3.3 | 0.7 | 0.7 | 198.00 | 3.3 x 3.5 x 1.05 | |
744031003 | 3.6 | 1.4 | 1.1 | 66.00 | 3.8 x 3.8 x 1.8 | |
744031004 | 4.7 | 1.2 | 0.9 | 90.00 | 3.8 x 3.8 x 1.8 | |
74404024033 | 3.3 | 1.4 | 1.3 | 120.00 | 2.5 x 2 x 1.2 | |
74404024047 | 4.7 | 1.1 | 1.2 | 175.00 | 2.5 x 2 x 1.2 | |
74404032047 | 4.7 | 1.3 | 1.2 | 96.00 | 3 x 3 x 1.5 | |
74479888233 | 3.3 | 1.1 | 1.1 | 250.00 | 2.5 x 2 x 1 | |
74479889233 | 3.3 | 1.3 | 1.3 | 250.00 | 2.5 x 2 x 1.2 | |
74479889247 | 4.7 | 0.9 | 0.9 | 400.00 | 2.5 x 2 x 1.2 |