LT8331 Boost Converter Overview
Description
LT8331 is a 140.00 V, 0.60 A switch current limit non-sync Boost Converter from . The input voltage from 4.50 V to 100.00 V can be boosted into an output voltage ranging from 4.00 V to 140.00 V.
Features of the Boost Converter are adjustable 500 kHz switching frequency, a typical inductor size of 100.0 µH and it offers a peak efficiency of up to 90 %. The minimum external component count is 11 and LT8331 is available in 1 package option(s): MSOP-12 .
Feature and parameter overview with replacement search
For LT8331 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. | 4.50 V | |
| V-IN max. | 100.00 V | |
| Current-Limit typ.? | 0.60 A | |
| V-OUT min. | 4.00 V | |
| V-OUT max. | 140.00 V | |
| VOUT | adjustable | |
| VOUT programmable |  |
|
| sync/non-sync | non-sync | |
| Frequency typ. | 500 kHz | |
| Frequency adjustable | adjustable | |
| Frequency selectable | ||
| Frequency adj. min. | 100 kHz | |
| Frequency adj. max. | 500 kHz | |
| extern clock sync. |  |
|
| Softstart | |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| LBI/LBO | |
|
| Frequency sync. min. | 100 kHz | |
| Frequency sync. max. | 500 kHz | |
| Down Mode | |
|
| Quiescent current max. | 1700 µA | |
| Operating min. | ||
| Operating max. | ||
| Junction min. | -40 °C | |
| Junction max. | 125 °C | |
| thermal shutdown typ. | 170 °C | |
| Inductor size typ. | 100.0 µH | |
| Inductor suggested by Würth Elektronik | ||
| Automotive AEC-Q100 | |
|
| Light-Load-Mode | |
|
| Topology | Boost | |
| Peak Efficiency | 90 % | |
| Component count min. | 11 | |
| current limit adjustable | |
|
| Nr.of package options | 1 | |
| CSP | ||
| SC70 | ||
| SOT | ||
| MSOP | MSOP-12 | |
| QFN/DFN | ||
| SO/SOIC | ||
| SOP | ||
| DIP | ||
| TO | ||
| DDPAK |
LT8331 Datasheet
Link to the most up-to-date LT8331 datasheet and the product page for EVM, tools and support information.
LT8331 Price breaks and distributor sample stock
LT8331 prices and available online distributors.
Available Distributors with stock: 3
Chip One Stop (3)
Digi-Key (2)
Newark Electronics (2)
Available Distributors without stock: 1
Element14 (0)
Available Distributors with stock: 0
Alternatives and equivalents
The following DC/DC Boost Converter are similar to LT8331. Optional, compare LT8331 side-by-side with other Boost Converter via the Comparison function.
| Variation | Compare | Product | Manufacturer | Package | |
| 50% | LM5002 |  LM5002 product overview |
Texas Instruments | WSON-8, SOIC-8 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT8331.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 744325120 | 1.2 | 20.0 | 25.0 | 1.80 | 10.5 x 10.2 x 5 | |
| 7443320082 | 0.8 | 24.0 | 36.0 | 1.85 | 12.1 x 11.4 x 10 | |
| 7443320100 | 1.0 | 24.0 | 32.0 | 1.85 | 12.1 x 11.4 x 10 | |
| 7443320150 | 1.5 | 19.5 | 27.0 | 2.95 | 12.1 x 11.4 x 10 | |
| 7443330082 | 0.8 | 20.0 | 36.0 | 2.15 | 10.9 x 10 x 9.7 | |
| 7443330100 | 1.0 | 20.0 | 27.5 | 2.15 | 10.9 x 10 x 9.7 | |
| 7443550140 | 1.4 | 22.0 | 26.0 | 2.40 | 13 x 12.8 x 5 | |
| 744355090 | 0.9 | 24.0 | 28.0 | 1.62 | 13 x 12.8 x 5 | |
| 7443551130 | 1.3 | 25.0 | 25.0 | 1.70 | 13.2 x 12.8 x 6.5 | |
| 744355182 | 0.8 | 27.0 | 35.0 | 1.04 | 13 x 12.8 x 6.5 |
