LT3437 Buck Converter overview
Description
LT3437 is a 60.00 V non-sync Buck Converter from with 0.40 A output current. The maximum 60.00 V input voltage can be regulated down into a 1.25 V to 30.00 V output voltage.
It requires are a typical inductor size of 100.00 µH, a typical external component count of 13 and achieves a peak efficiency of 80 %. Further LT3437 characteristics are a fixed 200 kHz switching frequency and 2 available package option(s): DFN-10 TSSOP-16 .
Parameter overview and features with replacement search
For the LT3437 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. | 3.30 V | |
V-IN max. | 60.00 V | |
I-OUT? | 0.40 A | |
V-OUT min. | 1.25 V | |
V-OUT max. | 30.00 V | |
V-OUT | adjustable V | |
V-OUT programmable | ![]() |
|
sync/non-sync | non-sync | |
Frequency typ. | 200 kHz | |
Frequency | fixed | |
Frequency selectable | ||
ext.clock sync. | ![]() |
|
Frequency adj./ ext.clock min. | 240 kHz | |
Frequency adj./ ext.clock max | 700 kHz | |
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. | 1000 µA | |
Operating min. | -40 °C | |
Operating max. | 140 °C | |
Junction min. | ||
Junction max. | ||
thermal shutdown typ. | ||
Inductor size typ. | 100.00 µH | |
Inductor suggested by Würth Elektronik | ||
Automotive AEC-Q100 | ![]() |
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Light-Load-Mode | ![]() |
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Topology | Buck | |
Peak Efficiency | 80 % | |
Component count min. | 13 | |
current limit adjustable | ![]() |
|
Nr.of packages | 2 | |
CSP | ||
SC70 | ||
SOT | ||
MSOP | ||
QFN/DFN | DFN-10 | |
SO/SOIC | ||
SOP | TSSOP-16 | |
DIP | ||
TO | ||
DDPAK |
LT3437 Datasheet
Link to the most up-to-date LT3437 datasheet and the product page for EVM, tools and support information.
LT3437 Sample stock and distributor price breaks
LT3437 prices and online available distributors.


Available Distributors with stock: 6
ARROW-NAC (5)
Chip-One-Stop (7)
Product | Stock | Price | Buy | ||||||||||||
LT3437EDD#PBF | 1613 |
| Buy Now | ||||||||||||
LT3437EFE#PBF | 1193 |
| Buy Now | ||||||||||||
LT3437HFE#PBF | 460 |
| Buy Now | ||||||||||||
LT3437HFE#PBF | 460 |
| Buy Now | ||||||||||||
LT3437IDD#PBF | 1209 |
| Buy Now | ||||||||||||
LT3437IDD#TRPBF | 20000 |
| Buy Now | ||||||||||||
LT3437IFE#PBF | 1063 |
| Buy Now |
DIGI-KEY (4)
Element14 (3)
FARNELL-ELEMENT14 (3)
RS-COMPONENTS (4)
Available Distributors without stock: 1
NEWARK (0)
Available Distributors with stock: 0
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to LT3437. Optional, compare LT3437 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 LT3437.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
74404041470 | 47.0 | 0.6 | 0.6 | 987.00 | 4 x 4 x 1.2 | |
74404042470 | 47.0 | 0.6 | 0.7 | 620.00 | 4 x 4 x 1.8 | |
74404052470 | 47.0 | 0.8 | 1.0 | 521.00 | 5 x 5 x 2 | |
744043390 | 39.0 | 0.8 | 0.5 | 215.00 | 4.8 x 4.8 x 3 | |
744043470 | 47.0 | 0.8 | 0.5 | 250.00 | 4.8 x 4.8 x 3 | |
744052470 | 47.0 | 0.8 | 0.7 | 530.00 | 5.8 x 5.8 x 2 | |
744053470 | 47.0 | 0.8 | 0.7 | 220.00 | 5.8 x 5.8 x 3 | |
744062470 | 47.0 | 0.7 | 0.6 | 260.00 | 6.8 x 6.8 x 2.5 | |
74408941470 | 47.0 | 0.4 | 0.8 | 1,133.00 | 4.8 x 4.8 x 2.1 | |
74408942470 | 47.0 | 0.7 | 1.0 | 515.00 | 4.8 x 4.8 x 3.1 | |
74408942560 | 56.0 | 0.5 | 0.8 | 780.00 | 4.8 x 4.8 x 3.1 | |
74408943560 | 56.0 | 0.7 | 0.9 | 418.00 | 4.8 x 4.8 x 4.1 | |
744773139 | 39.0 | 0.8 | 0.9 | 418.00 | 4 x 4.5 x 3.5 | |
744773147 | 47.0 | 0.7 | 0.8 | 523.00 | 4 x 4.5 x 3.5 | |
744773156 | 56.0 | 0.6 | 0.8 | 714.00 | 4 x 4.5 x 3.5 | |
744778147 | 47.0 | 0.9 | 1.0 | 315.00 | 7.3 x 7.3 x 3.4 | |
744778156 | 56.0 | 0.8 | 0.9 | 322.00 | 7.3 x 7.3 x 3.4 | |
7447785147 | 47.0 | 0.9 | 0.7 | 500.00 | 5.9 x 6.2 x 3.3 | |
7447786147 | 47.0 | 1.4 | 0.8 | 260.00 | 5.9 x 6.2 x 5.1 | |
7447789147 | 47.0 | 0.9 | 1.0 | 315.00 | 7.3 x 7.3 x 3.5 | |
7447789156 | 56.0 | 0.8 | 0.9 | 335.00 | 7.3 x 7.3 x 3.5 | |
784773139 | 39.0 | 0.8 | 0.9 | 418.00 | 4 x 4.5 x 3.5 | |
784773147 | 47.0 | 0.7 | 0.8 | 523.00 | 4 x 4.5 x 3.5 | |
784773156 | 56.0 | 0.6 | 0.8 | 714.00 | 4 x 4.5 x 3.5 | |
784774147 | 47.0 | 0.9 | 1.0 | 260.00 | 5.2 x 5.8 x 4.85 | |
784774156 | 56.0 | 0.8 | 0.9 | 298.00 | 5.2 x 5.8 x 4.85 |