LT3470 Buck Converter overview
Description
LT3470 is a 40.00 V non-sync Buck Converter from with 0.20 A output current. The maximum 40.00 V input voltage can be regulated down into a 1.25 V to 16.00 V output voltage.
It requires are a typical inductor size of 33.00 µH, a typical external component count of 7 and achieves a peak efficiency of 81 %. Further LT3470 characteristics are a fixed 800 kHz switching frequency and 2 available package option(s): TSOT23-5 DFN-8 .
Parameter overview and features with replacement search
For the LT3470 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. | 4.00 V | |
V-IN max. | 40.00 V | |
I-OUT? | 0.20 A | |
V-OUT min. | 1.25 V | |
V-OUT max. | 16.00 V | |
V-OUT | adjustable V | |
V-OUT programmable | ![]() |
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sync/non-sync | non-sync | |
Frequency typ. | 800 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. | 18 µA | |
Operating min. | -40 °C | |
Operating max. | 150 °C | |
Junction min. | ||
Junction max. | ||
thermal shutdown typ. | ||
Inductor size typ. | 33.00 µH | |
Inductor suggested by Würth Elektronik | ||
Automotive AEC-Q100 | ![]() |
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Light-Load-Mode | ![]() |
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Topology | Buck | |
Peak Efficiency | 81 % | |
Component count min. | 7 | |
current limit adjustable | ![]() |
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Nr.of packages | 2 | |
CSP | ||
SC70 | ||
SOT | TSOT23-5 | |
MSOP | ||
QFN/DFN | DFN-8 | |
SO/SOIC | ||
SOP | ||
DIP | ||
TO | ||
DDPAK |
LT3470 Datasheet
Link to the most up-to-date LT3470 datasheet and the product page for EVM, tools and support information.
LT3470 Sample stock and distributor price breaks
LT3470 prices and online available distributors.


Available Distributors with stock: 13
Buerklin (1)
Product | Stock | Price | Buy |
LT3470ITS8#TRMPBF | 521 | Buy Now |
Chip One Stop (2)
Conrad COM (1)
Conrad UK (1)
Digi-Key (16)
Distrelec (2)
Element14 (2)
Farnell Element14 (3)
Newark Electronics (1)
RS Components (5)
Reichelt Elektronik (2)
Schukat Electronic (1)
Transfer Multisort Elektronik (1)
Available Distributors with stock: 12
Arrow Electronics
Product | Stock | Price | Buy | ||||
LT3470AIDDB#TRPBF | 5000 |
| Buy Now | ||||
LT3470EDDB#TRMPBF | 1000 |
| Buy Now | ||||
LT3470AHDDB#TRMPBF | 500 |
| Buy Now | ||||
LT3470HDDB#TRMPBF | 500 |
| Buy Now | ||||
LT3470IDDB#TRMPBF | 296 |
| Buy Now | ||||
LT3470EDDB#TRMPBF | 100 |
| Buy Now | ||||
LT3470AEDDB#TRMPBF | 7 |
| Buy Now | ||||
LT3470AHDDB#TRMPBF | 0 |
| Buy Now | ||||
LT3470AEDDB#TRMPBF | 0 |
| Buy Now | ||||
LT3470AEDDB#TRMPBF | 0 |
| Buy Now | ||||
LT3470AIDDB#TRPBF | 0 |
| Buy Now | ||||
LT3470HDDB#TRMPBF | 0 |
| Buy Now | ||||
LT3470IDDB#TRMPBF | 0 |
| Buy Now | ||||
LT3470IDDB#TRMPBF | 0 |
| Buy Now | ||||
LT3470ITS8#TRMPBF | 0 |
| Buy Now |
Digi-Key
Product | Stock | Price | Buy | ||||||||
LT3470EDDB#TRMPBF | 1646 |
| Buy Now | ||||||||
LT3470EDDB#TRMPBF | 1646 |
| Buy Now | ||||||||
LT3470EDDB#TRMPBF | 1500 |
| Buy Now | ||||||||
LT3470ITS8#TRMPBF | 1322 |
| Buy Now | ||||||||
LT3470ITS8#TRMPBF | 1322 |
| Buy Now | ||||||||
LT3470ITS8#TRMPBF | 1000 |
| Buy Now | ||||||||
LT3470AEDDB#TRMPBF | 584 |
| Buy Now | ||||||||
LT3470AEDDB#TRMPBF | 584 |
| Buy Now | ||||||||
LT3470HDDB#TRMPBF | 555 |
| Buy Now | ||||||||
LT3470HDDB#TRMPBF | 555 |
| Buy Now | ||||||||
LT3470HDDB#TRMPBF | 500 |
| Buy Now | ||||||||
LT3470IDDB#TRMPBF | 421 |
| Buy Now | ||||||||
LT3470IDDB#TRMPBF | 421 |
| Buy Now | ||||||||
LT3470AEDDB#TRMPBF | 0 |
| Buy Now | ||||||||
LT3470IDDB#TRMPBF | 0 |
| Buy Now |
Mouser Electronics
America II Electronics
Quest Components
TME Electronic Components
ComS.I.T.
element14 Asia-Pacific
Farnell element14
Schukat electronic
Chip1Stop
RS Components
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to LT3470. Optional, compare LT3470 side-by-side with other Buck Converter via the Comparison function.
Variation | Compare | Product | Manufacturer | Package | |
0% | LT3437 | ![]() |
Linear Technology | TSSOP-16, DFN-10 | |
0% | LT3470A | ![]() |
Linear Technology | DFN-8 | |
50% | MAX1836 | ![]() |
Maxim | TDFN-EP-6, SOT23-6 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3470.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
744025270 | 27.0 | 0.5 | 0.7 | 745.00 | 2.8 x 2.8 x 3 | |
744031220 | 22.0 | 0.5 | 0.4 | 410.00 | 3.8 x 3.8 x 1.8 | |
744032180 | 18.0 | 0.2 | 0.7 | 880.00 | 3.2 x 2.5 x 2.3 | |
744032220 | 22.0 | 0.2 | 0.6 | 1,040.00 | 3.2 x 2.5 x 2.3 | |
74404024180 | 18.0 | 0.5 | 0.7 | 830.00 | 2.5 x 2 x 1.2 | |
74404024220 | 22.0 | 0.5 | 0.6 | 910.00 | 2.5 x 2 x 1.2 | |
74404032220 | 22.0 | 0.6 | 0.6 | 450.00 | 3 x 3 x 1.5 | |
744042180 | 18.0 | 0.9 | 0.7 | 270.00 | 4.8 x 4.8 x 2 | |
744042220 | 22.0 | 0.9 | 0.6 | 280.00 | 4.8 x 4.8 x 2 | |
744043180 | 18.0 | 1.0 | 0.7 | 150.00 | 4.8 x 4.8 x 3 | |
744043220 | 22.0 | 0.9 | 0.7 | 160.00 | 4.8 x 4.8 x 3 | |
744043270 | 27.0 | 0.9 | 0.6 | 170.00 | 4.8 x 4.8 x 3 | |
7440680220 | 22.0 | 0.9 | 0.7 | 350.00 | 8 x 8 x 1.2 |