LTC3801 Buck Controller overview
Description
Manufacturer
Category
Sub-Category
LTC3801 is a 1 channel, 1 phase non-sync Buck Controller. The maximum input voltage ranges from 2.50 V to 9.80 V and output current goes up to 5.00 A.
The Controller features fixed 550 kHz switching frequency which results in a typical inductor size of 0.0 uH and a peak efficiency of %. The LTC3801 is available in 1 package option(s): SOT-23 .
Parameter and features overview
Parameter | Value | Replacement Search Filter |
Nr. of Channel | 1 | |
V-IN min. | 2.50 V | |
V-IN max. | 9.80 V | |
I-OUT? | 5.00 A | |
V-OUT min. | 0.80 V | |
V-OUT max. | 9.80 V | |
V-OUT | adjustable | |
V-OUT programmable | ||
sync/non-sync | non-sync | |
Frequency typ. | 550 kHz | |
Frequency adj. | fixed | |
Frequency adj. min. | ||
Frequency adj. max. | ||
ext.clock sync. | ![]() |
|
ext.clock Frequency min. | ||
ext.clock Frequency max. | ||
Softstart | ||
Softstart adjustable | ||
Tracking | ![]() |
|
Power Good (PG) | ||
Enable | ||
Operating min. | ||
Operating max. | ||
Junction min. | ||
Junction max. | ||
thermal shutdown typ. | ||
Inductor size typ. | ||
Automotive AEC-Q100 | ||
Light-Load Mode | ![]() |
|
Single/ Multiphase | single | |
Nr. of Phases | 1 | |
Peak Efficiency | ||
component count min. | ||
current limit adjustable | ||
Nr.of package options | 1 | |
CSP | ||
SOT | SOT-23 | |
MSOP | ||
QFN/DFN | ||
SO/SOIC | ||
SOP | ||
DIP |
LTC3801 Datasheet
Link to the most up-to-date LTC3801 datasheet and the product page for EVM, tools and support information.
LTC3801 inventory, samples and price


Available Distributors with stock: 0
no online Distributor with LTC3801 stock available
Available Distributors with stock: 0
no online Distributor with LTC3801 stock available
Table with equivalents and alternatives
The following Buck Controller are similar to LTC3801. Or, compare LTC3801 side-by-side with other Buck Controller via the Comparison function.
Variation | Compare | Product | Manufacturer | Package | |
0% | LTC1772 | ![]() |
Linear Technology | SOT-23 | |
0% | LTC3772 | ![]() |
Linear Technology | SOT-23, DFN-8 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3801.
V-IN max. 9.8 V, I-OUT 5 A, V-OUT min. 0.8 V, Frequency typ. 550 kHz
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
744040630082 | 0.8 | 6.0 | 9.5 | 10.00 | 6 x 6 x 2.8 | |
74404063010 | 1.0 | 5.2 | 7.5 | 10.00 | 6 x 6 x 2.8 | |
74404064010 | 1.0 | 5.1 | 11.0 | 11.00 | 6 x 6 x 4.5 | |
744065001 | 1.0 | 8.0 | 9.5 | 4.90 | 10 x 10 x 3.1 | |
7440710082 | 0.8 | 7.3 | 8.0 | 7.00 | 8 x 8 x 4.6 | |
744316100 | 1.0 | 11.5 | 11.5 | 4.75 | 5.5 x 5.3 x 4.3 | |
744373240068 | 0.7 | 5.5 | 10.0 | 16.00 | 4.45 x 4.06 x 2 | |
74437324010 | 1.0 | 5.0 | 9.0 | 22.00 | 4.45 x 4.06 x 2 | |
74437336010 | 1.0 | 7.5 | 11.0 | 13.00 | 5.7 x 5.2 x 3 | |
744383560068 | 0.7 | 8.2 | 9.4 | 7.50 | 4.1 x 4.1 x 2.1 | |
74438356010 | 1.0 | 7.2 | 9.0 | 12.00 | 4.1 x 4.1 x 2.1 | |
7447462010 | 1.0 | 8.5 | 8.0 | 6.00 | 5.5 x 5.5 x 8.5 | |
744772010 | 1.0 | 7.5 | 10.0 | 4.70 | 7.8 x 7.8 x 10 | |
744777001 | 1.0 | 6.8 | 10.2 | 8.40 | 7.3 x 7.3 x 4.5 | |
7447779001 | 1.0 | 5.3 | 9.5 | 10.00 | 7.3 x 7.3 x 4.5 | |
744778001 | 1.0 | 5.4 | 6.4 | 9.00 | 7.3 x 7.3 x 3.4 | |
7447789001 | 1.0 | 5.4 | 6.4 | 10.00 | 7.3 x 7.3 x 3.5 |