LTC3405A Buck Converter overview
Description
LTC3405A is a 5.50 V sync Buck Converter from with 0.30 A output current. The maximum 5.50 V input voltage can be regulated down into a 0.80 V to 5.50 V output voltage.
It requires are a typical inductor size of 4.70 µH, a typical external component count of 6 and achieves a peak efficiency of 96 %. Further LTC3405A characteristics are a fixed 1500 kHz switching frequency and 1 available package option(s): TSOT23 .
Parameter overview and features with replacement search
For the LTC3405A 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? | 0.30 A | |
| V-OUT min. | 0.80 V | |
| V-OUT max. | 5.50 V | |
| V-OUT | adjustable 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 | |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| Quiescent current max. | 400 µA | |
| Operating min. | -40 °C | |
| Operating max. | 85 °C | |
| Junction min. | ||
| Junction max. | ||
| thermal shutdown typ. | ||
| Inductor size typ. | 4.70 µH | |
| Inductor suggested by Würth Elektronik | ||
| Automotive AEC-Q100 | |
|
| Light-Load-Mode |  |
|
| Topology | Buck | |
| Peak Efficiency | 96 % | |
| Component count min. | 6 | |
| current limit adjustable | |
|
| Nr.of packages | 1 | |
| CSP | ||
| SC70 | ||
| SOT | TSOT23 | |
| MSOP | ||
| QFN/DFN | ||
| SO/SOIC | ||
| SOP | ||
| DIP | ||
| TO | ||
| DDPAK |
LTC3405A Datasheet
Link to the most up-to-date LTC3405A datasheet and the product page for EVM, tools and support information.
LTC3405A Sample stock and distributor price breaks
LTC3405A 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 LTC3405A. Optional, compare LTC3405A 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 LTC3405A.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 744028004 | 4.7 | 0.9 | 0.7 | 265.00 | 2.8 x 2.8 x 1.2 | |
| 744029004 | 4.7 | 1.0 | 0.8 | 170.00 | 2.8 x 2.8 x 1.5 | |
| 744030004 | 4.7 | 0.5 | 0.5 | 252.00 | 3.3 x 3.5 x 1.05 | |
| 74479887247A | 4.7 | 1.0 | 0.4 | 230.00 | 2.5 x 2 x 1 | |
| 74479888247 | 4.7 | 1.0 | 0.7 | 380.00 | 2.5 x 2 x 1 |
