LTC3605 Buck Converter overview
Description
LTC3605 is a 15.00 V sync Buck Converter from with 5.00 A output current. The maximum 15.00 V input voltage can be regulated down into a 0.60 V to 14.85 V output voltage.
It requires are a typical inductor size of 1.00 µH, a typical external component count of 12 and achieves a peak efficiency of 95 %. Further LTC3605 characteristics are a adjustable 1000 kHz switching frequency and 1 available package option(s): QFN-24 .
Parameter overview and features with replacement search
For the LTC3605 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. | 15.00 V | |
| I-OUT? | 5.00 A | |
| V-OUT min. | 0.60 V | |
| V-OUT max. | 14.85 V | |
| V-OUT | adjustable V | |
| V-OUT programmable |  |
|
| sync/non-sync | sync | |
| Frequency typ. | 1000 kHz | |
| Frequency | adjustable | |
| Frequency selectable | ||
| ext.clock sync. |  |
|
| Frequency adj./ ext.clock min. | 800 kHz | |
| Frequency adj./ ext.clock max | 4000 kHz | |
| Softstart | |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| Quiescent current max. | 5000 µA | |
| Operating min. | -40 °C | |
| Operating max. | 125 °C | |
| Junction min. | ||
| Junction max. | ||
| thermal shutdown typ. | 160 °C | |
| Inductor size typ. | 1.00 µH | |
| Inductor suggested by Würth Elektronik | ||
| Automotive AEC-Q100 | |
|
| Light-Load-Mode | |
|
| Topology | Buck | |
| Peak Efficiency | 95 % | |
| Component count min. | 12 | |
| current limit adjustable | |
|
| Nr.of packages | 1 | |
| CSP | ||
| SC70 | ||
| SOT | ||
| MSOP | ||
| QFN/DFN | QFN-24 | |
| SO/SOIC | ||
| SOP | ||
| DIP | ||
| TO | ||
| DDPAK |
LTC3605 Datasheet
Link to the most up-to-date LTC3605 datasheet and the product page for EVM, tools and support information.
LTC3605 Sample stock and distributor price breaks
LTC3605 prices and online available distributors.
Available Distributors with stock: 7
ARROW-NAC (3)
Chip-One-Stop (8)
| Product | Stock | Price | Buy | ||||||||||||
| LTC3605AEUF#PBF | 88 |
| Buy Now | ||||||||||||
| LTC3605AEUF#PBF | 69 |
| Buy Now | ||||||||||||
| LTC3605AIUF#PBF | 188 |
| Buy Now | ||||||||||||
| LTC3605AIUF#PBF | 12 |
| Buy Now | ||||||||||||
| LTC3605EUF#PBF | 93 |
| Buy Now | ||||||||||||
| LTC3605EUF#PBF | 89 |
| Buy Now | ||||||||||||
| LTC3605IUF#PBF | 85 |
| Buy Now | ||||||||||||
| LTC3605IUF#PBF | 613 |
| Buy Now |
DIGI-KEY (6)
Element14 (1)
FARNELL-ELEMENT14 (1)
NEWARK (1)
RS-COMPONENTS (1)
Available Distributors with stock: 0
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to LTC3605. Optional, compare LTC3605 side-by-side with other Buck Converter via the Comparison function.
| Variation | Compare | Product | Manufacturer | Package | |
| 0% | LTC3605A |  LTC3605A product overview |
Linear Technology | QFN-24 | |
| 0% | TPS54020 | TPS54020 product overview |
Texas Instruments | VQFN-15 | |
| 0% | TPS54623 | TPS54623 product overview |
Texas Instruments | QFN-14 | |
| 0% | TPS54821 | TPS54821 product overview |
Texas Instruments | VQFN-14 | |
| 10% | IR3856M | IR3856M product overview |
IRF | PQFN-17 | |
| 10% | IR3856WM | IR3856WM product overview |
IRF | PQFN-17 | |
| 25% | IR3853M | IR3853M product overview |
IRF | PQFN-17 | |
| 25% | LT3690 | LT3690 product overview |
Linear Technology | QFN-26 | |
| 25% | TPS54521 | TPS54521 product overview |
Texas Instruments | VQFN-14 | |
| 50% | LTC3603 | LTC3603 product overview |
Linear Technology | QFN-16, MSOP-16 | |
| 50% | LTC3604 | LTC3604 product overview |
Linear Technology | QFN-16, MSOP-16 | |
| 50% | LTC3626 | LTC3626 product overview |
Linear Technology | QFN-20 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3605.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 74407000047 | 0.5 | 7.8 | 6.5 | 5.80 | 8 x 8 x 2 | |
| 744373210047 | 0.5 | 5.4 | 9.0 | 18.00 | 4.45 x 4.06 x 1.2 | |
| 744383360033 | 0.3 | 5.5 | 8.3 | 14.00 | 3 x 3 x 2 | |
| 744383560033 | 0.3 | 9.6 | 12.4 | 6.00 | 4.1 x 4.1 x 2.1 | |
| 744778005 | 0.5 | 5.6 | 9.0 | 7.20 | 7.3 x 7.3 x 3.4 |
