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: 0
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 | ![]() |
Linear Technology | QFN-24 | |
0% | TPS54020 | ![]() |
Texas Instruments | VQFN-15 | |
0% | TPS54623 | ![]() |
Texas Instruments | QFN-14 | |
0% | TPS54821 | ![]() |
Texas Instruments | VQFN-14 | |
10% | IR3856M | ![]() |
IRF | PQFN-17 | |
10% | IR3856WM | ![]() |
IRF | PQFN-17 | |
25% | IR3853M | ![]() |
IRF | PQFN-17 | |
25% | LT3690 | ![]() |
Linear Technology | QFN-26 | |
25% | TPS54521 | ![]() |
Texas Instruments | VQFN-14 | |
50% | LTC3603 | ![]() |
Linear Technology | QFN-16, MSOP-16 | |
50% | LTC3604 | ![]() |
Linear Technology | QFN-16, MSOP-16 | |
50% | LTC3626 | ![]() |
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 |