Inicio Gestión de la energía AC/DC & DC/DC converters (integrated FET)

TPS54478

ACTIVO

Convertidor reductor SWIFT™ síncrono de 6 A, con entrada de 2.95 V a 4A con límite de corriente Hicc

Detalles del producto

Iout (max) (A) 4 Vin (min) (V) 2.95 Vin (max) (V) 6 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2000 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000525
Iout (max) (A) 4 Vin (min) (V) 2.95 Vin (max) (V) 6 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2000 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000525
WQFN (RTE) 16 9 mm² 3 x 3
  • Two 30-mΩ (typical) MOSFETs for High Efficiency at 4-A Loads
  • 200-kHz to 2-MHz Switching Frequency
  • 0.6-V ± 1% Voltage Reference Over Temperature (–40°C to +150°C)
  • Start-up With Prebiased Voltage
  • Synchronizes to External Clock
  • Adjustable Slow Start / Sequencing
  • UV and OV Power-Good Output
  • Cycle by Cycle Current Limit and Hiccup Current Protection
  • Thermally Enhanced 3-mm × 3-mm 16-Pin WQFN (RTE)
  • Pin Compatible to TPS54418
  • Create a Custom Design Using the TPS54478 With the WEBENCH® Power Designer
  • Two 30-mΩ (typical) MOSFETs for High Efficiency at 4-A Loads
  • 200-kHz to 2-MHz Switching Frequency
  • 0.6-V ± 1% Voltage Reference Over Temperature (–40°C to +150°C)
  • Start-up With Prebiased Voltage
  • Synchronizes to External Clock
  • Adjustable Slow Start / Sequencing
  • UV and OV Power-Good Output
  • Cycle by Cycle Current Limit and Hiccup Current Protection
  • Thermally Enhanced 3-mm × 3-mm 16-Pin WQFN (RTE)
  • Pin Compatible to TPS54418
  • Create a Custom Design Using the TPS54478 With the WEBENCH® Power Designer

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.

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.

Descargar Ver vídeo con transcripción Video

Documentación técnica

star =Principal documentación para este producto seleccionada por TI
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 11
Tipo Título 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
Application note Minimizing Output Ripple During Startup 22 jun 2017
User 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

Diseño y desarrollo

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.

Placa de evaluación

TPS54478EVM-037 — Módulo de evaluación para convertidor reductor síncrono TPS54478 con inicio prepolarizado

The TPS54478EVM-037 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS54478 Synchronous Step-Down Switcher. The EVM operates from a 3V to 6V supply and provides a 1.8V output at 4A.
Guía del usuario: PDF
Modelo de simulación

TPS54478 TINA-TI Average Reference Design

SLVM762.TSC (237 KB) - TINA-TI Reference Design
Modelo de simulación

TPS54478 TINA-TI Average Spice Model

SLVM761.ZIP (7 KB) - TINA-TI Spice Model
Modelo de simulación

TPS54478 Unencrypted PSpice Average Model Package (Rev. A)

SLVM279A.ZIP (67 KB) - PSpice Model
Modelo de simulación

TPS54478 Unencrypted PSpice Transient Model Package (Rev. A)

SLVMAE8A.ZIP (110 KB) - PSpice Model
Paquete Pasadores Descargar
WQFN (RTE) 16 Ver opciones

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros 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 preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI. ​​​​​​​​​​​​​​

Videos