The TPS54540B is a 42-V, 5-A step-down regulator with an integrated high side MOSFET. Current-mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces no-load-supply current to 146 µA. Shutdown supply current is reduced to 2 µA when the EN (enable) pin is pulled low.
Undervoltage lockout is internally set at 4.3 V but can be increased using the EN pin. Output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot.
A wide switching frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.
The TPS54540B is available in an 8-pin thermally enhanced HSOIC PowerPAD package.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS54540B 4.5-V to 42-V Input, 5-A step-down dc/dc converter with Eco-mode™ datasheet | PDF | HTML | 24 Jan 2019 |
| Application note | NRND & Differences TPS54340/360/540/560 and TPS54340B/360B/540B/560B | 05 Apr 2019 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | Download |
|---|---|---|
| HSOIC (DDA) | 8 | View options |
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.