LTC3611 Buck Converter overview
Description
LTC3611 is a 32.00 V sync Buck Converter from with 10.00 A output current. The maximum 32.00 V input voltage can be regulated down into a 0.60 V to 31.40 V output voltage.
It requires are a typical inductor size of 1.00 µH, a typical external component count of 15 and achieves a peak efficiency of 95 %. Further LTC3611 characteristics are a adjustable 560 kHz switching frequency and 1 available package option(s): QFN-64 .
Parameter overview and features with replacement search
For the LTC3611 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. | 4.50 V | |
| V-IN max. | 32.00 V | |
| I-OUT? | 10.00 A | |
| V-OUT min. | 0.60 V | |
| V-OUT max. | 31.40 V | |
| V-OUT | adjustable V | |
| V-OUT programmable |  |
|
| sync/non-sync | sync | |
| Frequency typ. | 560 kHz | |
| Frequency | adjustable | |
| Frequency selectable | ||
| ext.clock sync. | |
|
| Frequency adj./ ext.clock min. | 540 kHz | |
| Frequency adj./ ext.clock max | 620 kHz | |
| Softstart |  |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| Quiescent current max. | 2000 µA | |
| Operating min. | ||
| Operating max. | ||
| Junction min. | -40 °C | |
| Junction max. | 125 °C | |
| thermal shutdown typ. | ||
| 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. | 15 | |
| current limit adjustable | |
|
| Nr.of packages | 1 | |
| CSP | ||
| SC70 | ||
| SOT | ||
| MSOP | ||
| QFN/DFN | QFN-64 | |
| SO/SOIC | ||
| SOP | ||
| DIP | ||
| TO | ||
| DDPAK |
LTC3611 Datasheet
Link to the most up-to-date LTC3611 datasheet and the product page for EVM, tools and support information.
LTC3611 Sample stock and distributor price breaks
LTC3611 prices and online available distributors.
Available Distributors with stock: 5
ARROW-NAC (2)
Chip-One-Stop (3)
Element14 (1)
FARNELL-ELEMENT14 (1)
RS-COMPONENTS (1)
Available Distributors with stock: 0
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to LTC3611. Optional, compare LTC3611 side-by-side with other Buck Converter via the Comparison function.
| Variation | Compare | Product | Manufacturer | Package | |
| 25% | IR3475M |  IR3475M product overview |
IRF | PQFN-14 | |
| 25% | IR3476M | IR3476M product overview |
IRF | PQFN-14 | |
| 25% | IR3477M | IR3477M product overview |
IRF | PQFN-14 | |
| 25% | IR3871M | IR3871M product overview |
IRF | PQFN-17 | |
| 25% | IR3876M | IR3876M product overview |
IRF | PQFN-17 | |
| 25% | LTC3610 | LTC3610 product overview |
Linear Technology | QFN-64 | |
| 50% | IR3473M | IR3473M product overview |
IRF | PQFN-14 | |
| 50% | IR3863M | IR3863M product overview |
IRF | PQFN-17 | |
| 50% | IR3865M | IR3865M product overview |
IRF | PQFN-17 | |
| 50% | LTC3608 | LTC3608 product overview |
Linear Technology | QFN-52 | |
| 50% | LTC3609 | LTC3609 product overview |
Linear Technology | QFN-52 | |
| 50% | BD95500 | BD95500 product overview |
Rohm | QFN-40 | |
| 50% | TPS54020 | TPS54020 product overview |
Texas Instruments | VQFN-15 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3611.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 744305033 | 0.3 | 28.0 | 26.0 | 0.16 | 13.5 x 13.3 x 5.2 | |
| 744305040 | 0.4 | 28.0 | 20.0 | 0.16 | 13.5 x 13.3 x 5.2 | |
| 744306030 | 0.3 | 26.0 | 24.0 | 0.30 | 10.5 x 10.3 x 5.5 | |
| 744308033 | 0.3 | 27.0 | 30.0 | 0.37 | 10.1 x 7 x 7 | |
| 744308040 | 0.4 | 25.0 | 26.0 | 0.37 | 10.1 x 7 x 7 | |
| 7443081030 | 0.3 | 38.0 | 32.0 | 0.29 | 9.4 x 6.2 x 8.1 | |
| 7443081040 | 0.4 | 38.0 | 21.0 | 0.29 | 9.4 x 6.2 x 8.1 | |
| 744311047 | 0.4 | 19.0 | 25.0 | 1.85 | 7 x 6.9 x 4 | |
| 744314047 | 0.5 | 18.0 | 20.0 | 1.35 | 7 x 6.9 x 5 | |
| 744316033 | 0.3 | 18.5 | 20.0 | 1.75 | 5.5 x 5.3 x 4.3 | |
| 744316047 | 0.5 | 15.0 | 16.0 | 2.75 | 5.5 x 5.3 x 4.3 | |
| 7443340047 | 0.5 | 19.0 | 32.0 | 2.65 | 8.4 x 7.9 x 7.5 | |
| 744373460047 | 0.5 | 11.5 | 31.0 | 4.00 | 7.3 x 6.6 x 3 | |
| 744373490047 | 0.5 | 13.5 | 30.0 | 3.50 | 7.3 x 6.6 x 5 | |
| 744373770047 | 0.5 | 19.0 | 29.0 | 1.32 | 13.5 x 12.6 x 3.5 | |
| 74477009 | 0.5 | 23.5 | 26.4 | 2.90 | 12 x 12 x 8 | |
| 7447797050 | 0.5 | 13.2 | 23.0 | 4.30 | 10.2 x 10.2 x 4.5 | |
| 7447798050 | 0.5 | 18.5 | 18.0 | 2.20 | 10.2 x 10.2 x 6.4 |
