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 |  |
|
| sync/non-sync | non-sync | |
| Frequency typ. | 800 kHz | |
| Frequency | fixed | |
| Frequency selectable | ||
| ext.clock sync. | |
|
| Frequency adj./ ext.clock min. | ||
| Frequency adj./ ext.clock max | ||
| Softstart | |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| 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 | |
|
| Light-Load-Mode |  |
|
| Topology | Buck | |
| Peak Efficiency | 81 % | |
| Component count min. | 7 | |
| current limit adjustable | |
|
| 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: 0
Available Distributors with stock: 0
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 |  LT3437 product overview |
Linear Technology | TSSOP-16, DFN-10 | |
| 0% | LT3470A | LT3470A product overview |
Linear Technology | DFN-8 | |
| 50% | MAX1836 | MAX1836 product overview |
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 |
