LT3433 Buck-Boost Converter Overview
Description
LT3433 is a 60.00 V, 0.40 A output current non-sync Buck-Boost Converter from . The 4.00 V to 60.00 V input range can be converted into a 3.30 V to 20.00 V output voltage.
The Buck-Boost Converter features fixed 200 kHz switching frequency, requires a typical inductor size of 100.0 µH and provides a peak efficiency of 82 %. LT3433 circuitry consists typically of 15 external components and is available in 1 package option(s): TSSOP-16 .
Parameter and feature overview with replacement search
For LT3433 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. | 4.00 V | |
| V-IN max. | 60.00 V | |
| I-OUT? | 0.40 A | |
| V-OUT min. | 3.30 V | |
| V-OUT max. | 20.00 V | |
| V-OUT fixed | adjustable | |
| V-OUT programmable |  |
|
| sync/non-sync | non-sync | |
| Frequency typ. | 200 kHz | |
| Frequency adjustable | fixed | |
| Frequency adjustable min. | ||
| Frequency adjustable max. | ||
| ext.clock sync | |
|
| Frequency sync. min. | ||
| Frequency sync. max. | ||
| Softstart |  |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| Quiescent current max. | 940 µA | |
| Operating min. | ||
| Operating max. | ||
| Junction min. | -40 °C | |
| Junction max. | 125 °C | |
| thermal shutdown typ. | ||
| Inductor size typ. | 100.0 µH | |
| Automotive AEC-Q100 | |
|
| Light-Load Mode | |
|
| Topology | Buck-Boost | |
| Peak Efficiency | 82 % | |
| Component count min. | 15 | |
| current limit adjustable | |
|
| LBI/LBO | |
|
| Nr. of package options | 1 | |
| CSP | ||
| SOT | ||
| MSOP | ||
| QFN | ||
| SO/SOIC | ||
| SOP | TSSOP-16 |
Charts and pictures
LT3433 Datasheet
Link to the most up-to-date LT3433 datasheet and the product page for EVM, tools and support information.
LT3433 Distributor price breaks and sample stock
LT3433 prices and available buy online distributors. Optional, check regional sources for price and inventory: for Russia via efind, for South Korea via ICPart, for Japan via ICBAIBAI, for China via IC5858 or International via IC2IC.
Available Distributors with stock: 0
Available Distributors with stock: 0
Equivalents and alternatives
The following Buck-Boost DC/DC Converter are similar to LT3433. Optional, compare LT3433 side-by-side with other selected Buck-Boost Converter via the Comparison function.
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3433.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 74404042101 | 100.0 | 0.4 | 0.6 | 1,430.00 | 4 x 4 x 1.8 | |
| 74404052101 | 100.0 | 0.6 | 0.6 | 1,090.00 | 5 x 5 x 2 | |
| 74404054101 | 100.0 | 0.7 | 0.8 | 560.00 | 5 x 5 x 4 | |
| 74404063101 | 100.0 | 0.7 | 0.7 | 500.00 | 6 x 6 x 2.8 | |
| 74404064101 | 100.0 | 0.8 | 1.0 | 433.00 | 6 x 6 x 4.5 | |
| 74404064121 | 120.0 | 0.8 | 1.0 | 520.00 | 6 x 6 x 4.5 | |
| 744065101 | 100.0 | 1.0 | 0.9 | 365.00 | 10 x 10 x 3.1 | |
| 744065121 | 120.0 | 0.9 | 0.9 | 428.00 | 10 x 10 x 3.1 | |
| 744065820 | 82.0 | 1.1 | 1.0 | 323.00 | 10 x 10 x 3.1 | |
| 744071101 | 100.0 | 1.0 | 0.9 | 270.00 | 8 x 8 x 4.6 | |
| 74408942820 | 82.0 | 0.5 | 0.7 | 940.00 | 4.8 x 4.8 x 3.1 | |
| 74408943101 | 100.0 | 0.5 | 0.7 | 770.00 | 4.8 x 4.8 x 4.1 | |
| 74408943820 | 82.0 | 0.6 | 0.8 | 689.00 | 4.8 x 4.8 x 4.1 | |
| 744741101 | 100.0 | 1.1 | 0.9 | 420.00 | 8 x 8 x 6 | |
| 7447462101 | 100.0 | 0.8 | 0.8 | 450.00 | 5.5 x 5.5 x 8.5 | |
| 744772121 | 120.0 | 0.9 | 1.0 | 181.00 | 7.8 x 7.8 x 10 | |
| 744775182 | 82.0 | 0.9 | 1.0 | 208.00 | 7 x 7.8 x 5.5 | |
| 74477520 | 100.0 | 0.8 | 0.9 | 248.20 | 7 x 7.8 x 5.5 | |
| 744775210 | 120.0 | 0.7 | 0.8 | 308.00 | 7 x 7.8 x 5.5 | |
| 744776212 | 120.0 | 0.9 | 1.0 | 243.00 | 9 x 10 x 5.9 | |
| 744777182 | 82.0 | 0.8 | 0.9 | 257.00 | 7.3 x 7.3 x 4.5 | |
| 74477720 | 100.0 | 0.8 | 0.8 | 290.00 | 7.3 x 7.3 x 4.5 | |
| 744777212 | 120.0 | 0.7 | 0.7 | 400.00 | 7.3 x 7.3 x 4.5 | |
| 7447779182 | 82.0 | 0.8 | 0.9 | 250.00 | 7.3 x 7.3 x 4.5 | |
| 744777920 | 100.0 | 0.8 | 0.8 | 290.00 | 7.3 x 7.3 x 4.5 | |
| 7447779212 | 120.0 | 0.7 | 0.7 | 396.00 | 7.3 x 7.3 x 4.5 | |
| 744778182 | 82.0 | 0.7 | 0.8 | 479.00 | 7.3 x 7.3 x 3.4 | |
| 74477820 | 100.0 | 0.6 | 0.8 | 585.00 | 7.3 x 7.3 x 3.4 | |
| 744778212 | 120.0 | 0.6 | 0.7 | 634.00 | 7.3 x 7.3 x 3.4 | |
| 744778520 | 100.0 | 0.7 | 0.5 | 950.00 | 5.9 x 6.2 x 3.3 | |
| 7447789182 | 82.0 | 0.7 | 0.8 | 470.00 | 7.3 x 7.3 x 3.5 | |
| 744778920 | 100.0 | 0.6 | 0.8 | 585.00 | 7.3 x 7.3 x 3.5 | |
| 7447789212 | 120.0 | 0.6 | 0.7 | 563.00 | 7.3 x 7.3 x 3.5 | |
| 744787101 | 100.0 | 1.0 | 0.9 | 396.00 | 7.8 x 7 x 5 | |
| 744787121 | 120.0 | 0.7 | 0.8 | 545.00 | 7.8 x 7 x 5 | |
| 744787820 | 82.0 | 1.0 | 0.9 | 278.00 | 7.8 x 7 x 5 | |
| 784774182 | 82.0 | 0.6 | 0.7 | 475.00 | 5.2 x 5.8 x 4.85 | |
| 78477420 | 100.0 | 0.6 | 0.7 | 510.00 | 5.2 x 5.8 x 4.85 | |
| 784774212 | 120.0 | 0.5 | 0.6 | 660.00 | 5.2 x 5.8 x 4.85 | |
| 784775182 | 82.0 | 0.9 | 1.0 | 248.00 | 7 x 7.8 x 5.5 | |
| 78477520 | 100.0 | 0.8 | 0.9 | 281.00 | 7 x 7.8 x 5.5 | |
| 784775212 | 120.0 | 0.7 | 0.8 | 340.00 | 7 x 7.8 x 5.5 | |
| 784776212 | 120.0 | 0.9 | 1.0 | 243.00 | 9 x 10 x 5.9 | |
| 784777101 | 100.0 | 0.7 | 0.8 | 390.00 | 7.3 x 7.3 x 4.3 | |
| 784778101 | 100.0 | 0.7 | 0.8 | 600.00 | 7.3 x 7.3 x 3.5 |
