The TPS54478 device is a full featured 6-V, 4-A, synchronous step down current mode converter with two integrated MOSFETs.
The TPS54478 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.
The TPS54478 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature. Efficiency is maximized through the integrated 30-mΩ MOSFETs and 525-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2.5 µA by entering a shutdown mode.
Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage start-up ramp is controlled by the soft-start pin. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage.
Cycle-by-cycle current limit, hiccup overcurrent protection, and thermal shutdown protect the device during an overcurrent condition.
For more SWIFT™ documentation, see the TI website at www.ti.com/swift.
| Documentación principal | Tipo | Título | Opciones de formato | Fecha |
|---|---|---|---|---|
| * | Data sheet | TPS54478 2.95-V to 6-V Input, 4-A Synchrns Step-Down SWIFT™ Cnvrtr w/ Hiccup datasheet (Rev. B) | 18 abr 2018 | |
| Application note | Semiconductor and IC Package Thermal Metrics (Rev. D) | PDF | HTML | 25 mar 2024 | |
| Analog Design Journal | Control-Mode Quick Reference Guide (Rev. B) | PDF | HTML | 29 ago 2023 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 08 abr 2021 | ||
| Application note | Calculating Efficiency (Rev. A) | 06 mar 2020 | ||
| Application note | Minimizing Output Ripple During Startup (Rev. A) | 20 may 2019 | ||
| Selection guide | SWIFT DC/DC Converters Selector Guide (Rev. G) | 06 feb 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 jun 2018 | ||
| EVM User's guide | TPS54478EVM-037 4-A, SWIFT Regulator Evaluation Module | 15 jun 2011 | ||
| Application note | Understanding Thermal Dissipation and Design of a Heatsink | 04 may 2011 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| WQFN (RTE) | 16 | Ultra Librarian |
Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.
El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.
Si tiene alguna pregunta sobre calidad, encapsulados o pedido de productos de TI, consulte el servicio de asistencia de TI.