LT3905 Boost Converter Overview
Description
LT3905 is a 2.60 V, 0.40 A switch current limit non-sync Boost Converter from . The input voltage from 2.70 V to 12.00 V can be boosted into an output voltage ranging from 2.60 V to 2.60 V.
Features of the Boost Converter are adjustable 2000 kHz switching frequency, a typical inductor size of 10.0 µH and it offers a peak efficiency of up to %. The minimum external component count is 11 and LT3905 is available in 1 package option(s): QFN-16 .
Feature and parameter overview with replacement search
For LT3905 replacement search, 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. | 2.70 V | |
| V-IN max. | 12.00 V | |
| Current-Limit typ.? | 0.40 A | |
| V-OUT min. | 2.60 V | |
| V-OUT max. | 2.60 V | |
| VOUT | 2.60 | |
| VOUT programmable |  |
|
| sync/non-sync | non-sync | |
| Frequency typ. | 2000 kHz | |
| Frequency adjustable | adjustable | |
| Frequency selectable | 1000/2000 kHz | |
| Frequency adj. min. | ||
| Frequency adj. max. | ||
| extern clock sync. |  |
|
| Softstart | |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| LBI/LBO | |
|
| Frequency sync. min. | ||
| Frequency sync. max. | ||
| Down Mode | |
|
| Quiescent current max. | 24 µA | |
| Operating min. | ||
| Operating max. | ||
| Junction min. | -40 °C | |
| Junction max. | 125 °C | |
| thermal shutdown typ. | 150 °C | |
| Inductor size typ. | 10.0 µH | |
| Inductor suggested by Würth Elektronik | ||
| Automotive AEC-Q100 | |
|
| Light-Load-Mode | |
|
| Topology | Boost | |
| Peak Efficiency | ||
| Component count min. | 11 | |
| current limit adjustable | |
|
| Nr.of package options | 1 | |
| CSP | ||
| SC70 | ||
| SOT | ||
| MSOP | ||
| QFN/DFN | QFN-16 | |
| SO/SOIC | ||
| SOP | ||
| DIP | ||
| TO | ||
| DDPAK |
LT3905 Datasheet
Link to the most up-to-date LT3905 datasheet and the product page for EVM, tools and support information.
LT3905 Price breaks and distributor sample stock
LT3905 prices and available online distributors.
Available Distributors with stock: 3
Chip One Stop (1)
| Product | Stock | Price | Buy | ||
| LT3905EUD#PBF | 2 |
| Buy Now |
Digi-Key (1)
Newark Electronics (1)
Available Distributors without stock: 2
Mouser Electronics (0)
Rutronik (0)
Available Distributors with stock: 4
Arrow Electronics
| Product | Stock | Price | Buy | ||||
| LT3905EUD#PBF | 2 |
| Buy Now | ||||
| LT3905EUD#PBF | 0 |
| Buy Now | ||||
| LT3905EUD#TRPBF | 0 |
| Buy Now | ||||
| LT3905IUD#TRPBF | 0 |
| Buy Now |
Digi-Key
| Product | Stock | Price | Buy | ||||||
| DC1956A | 3 |
| Buy Now | ||||||
| LT3905EUD#PBF | 0 |
| Buy Now | ||||||
| LT3905IUD#PBF | 0 |
| Buy Now | ||||||
| LT3905EUD#TRPBF | 0 |
| Buy Now | ||||||
| LT3905IUD#TRPBF | 0 |
| Buy Now |
Newark element14
Chip1Stop
Alternatives and equivalents
The following DC/DC Boost Converter are similar to LT3905. Optional, compare LT3905 side-by-side with other Boost Converter via the Comparison function.
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3905.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 74479762168 | 0.7 | 1.0 | 0.7 | 220.00 | 1.6 x 0.8 x 0.55 | |
| 74479763168 | 0.7 | 1.0 | 1.0 | 180.00 | 1.6 x 0.8 x 0.95 | |
| 74479773147 | 0.5 | 1.4 | 1.2 | 100.00 | 2 x 1.25 x 0.6 | |
| 74479773154 | 0.5 | 1.3 | 1.0 | 120.00 | 2 x 1.25 x 0.6 | |
| 74479774147 | 0.5 | 1.3 | 0.7 | 120.00 | 2 x 1.25 x 0.6 | |
| 74479775147A | 0.5 | 1.4 | 1.0 | 100.00 | 2 x 1.2 x 1.2 | |
| 74479787147B | 0.5 | 2.7 | 1.0 | 40.00 | 2.5 x 2 x 1 | |
| 74479897150 | 0.5 | 2.9 | 1.1 | 25.00 | 3.2 x 2.6 x 0.7 |
