RT8540A Boost Converter Overview
Description
RT8540A is a 5.45 V, 4.00 A switch current limit sync Boost Converter from . The input voltage from 2.80 V to 5.50 V can be boosted into an output voltage ranging from 3.83 V to 5.45 V.
Features of the Boost Converter are fixed 2000 kHz switching frequency, a typical inductor size of 2.2 µH and it offers a peak efficiency of up to 94 %. The minimum external component count is 3 and RT8540A is available in 1 package option(s): WQFN-20 .
Feature and parameter overview with replacement search
For RT8540A 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. | 2.80 V | |
| V-IN max. | 5.50 V | |
| Current-Limit typ.? | 4.00 A | |
| V-OUT min. | 3.83 V | |
| V-OUT max. | 5.45 V | |
| VOUT | adjustable | |
| VOUT programmable |  |
|
| sync/non-sync | sync | |
| Frequency typ. | 2000 kHz | |
| Frequency adjustable | fixed | |
| Frequency selectable | ||
| Frequency adj. min. | ||
| Frequency adj. max. | ||
| extern clock sync. |  |
|
| Softstart | |
|
| Softstart adjustable | |
|
| Tracking | |
|
| PG/Power OK | |
|
| LBI/LBO | |
|
| Frequency sync. min. | ||
| Frequency sync. max. | ||
| Down Mode | |
|
| Quiescent current max. | 700 µA | |
| Operating min. | -40 °C | |
| Operating max. | 85 °C | |
| Junction min. | -40 °C | |
| Junction max. | 125 °C | |
| thermal shutdown typ. | 150 °C | |
| Inductor size typ. | 2.2 µH | |
| Inductor suggested by Würth Elektronik | ||
| Automotive AEC-Q100 | |
|
| Light-Load-Mode | |
|
| Topology | Boost | |
| Peak Efficiency | 94 % | |
| Component count min. | 3 | |
| current limit adjustable | |
|
| Nr.of package options | 1 | |
| CSP | ||
| SC70 | ||
| SOT | ||
| MSOP | ||
| QFN/DFN | WQFN-20 | |
| SO/SOIC | ||
| SOP | ||
| DIP | ||
| TO | ||
| DDPAK |
RT8540A Datasheet
Link to the most up-to-date RT8540A datasheet and the product page for EVM, tools and support information.
RT8540A Price breaks and distributor sample stock
RT8540A prices and available online distributors.
Available Distributors with stock: 0
Available Distributors with stock: 0
Alternatives and equivalents
The following DC/DC Boost Converter are similar to RT8540A. Optional, compare RT8540A side-by-side with other Boost Converter via the Comparison function.
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8540A.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 744303022 | 0.2 | 31.0 | 32.0 | 0.33 | 10 x 6.8 x 5 | |
| 744304016 | 0.2 | 26.0 | 32.0 | 0.17 | 11.5 x 11.8 x 4 | |
| 744304022 | 0.2 | 26.0 | 23.0 | 0.17 | 11.5 x 11.8 x 4 | |
| 744306025 | 0.3 | 26.0 | 32.0 | 0.30 | 10.5 x 10.3 x 5.5 | |
| 744307022 | 0.2 | 29.0 | 29.0 | 0.33 | 7.4 x 7.2 x 7.2 | |
| 744311022 | 0.2 | 21.0 | 32.0 | 1.10 | 7 x 6.9 x 4 | |
| 744314024 | 0.2 | 20.0 | 28.0 | 1.00 | 7 x 6.9 x 5 | |
| 744316022 | 0.2 | 20.0 | 25.0 | 1.25 | 5.5 x 5.3 x 4.3 | |
| 744373240022 | 0.2 | 9.5 | 17.0 | 6.60 | 4.45 x 4.06 x 2 | |
| 7447797022 | 0.2 | 16.0 | 32.0 | 2.90 | 10.2 x 10.2 x 4.5 | |
| 7447798022 | 0.2 | 19.0 | 20.0 | 1.60 | 10.2 x 10.2 x 6.4 |
