Inicio Administración de potencia Reguladores conmutados CC/CC Convertidores de CC/CC

TPS54428

ACTIVO

Convertidor reductor síncrono SWIFT™ de 4 A, entrada de 4.5 V a 18 V, con Eco-Mode™

Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 7 Vout (min) (V) 0.76 Features Enable, Light-load efficiency, Soft-start adjustable, Synchronous rectification Control mode D-CAP2 Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00095 Duty cycle (max) (%) 65
Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 7 Vout (min) (V) 0.76 Features Enable, Light-load efficiency, Soft-start adjustable, Synchronous rectification Control mode D-CAP2 Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00095 Duty cycle (max) (%) 65
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm) VSON (DRC) 10 9 mm² (3 mm × 3 mm)
  • D-CAP2™ Mode Enables Fast Transient
    Response
  • Low Output Ripple and Allows Ceramic Output
    Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7.0 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 70 mΩ (High Side) and 53 mΩ (Low Side)
  • High Efficiency, Less Than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 650-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Auto-Skip Eco-mode™ for High Efficiency at Light
    Load
  • D-CAP2™ Mode Enables Fast Transient
    Response
  • Low Output Ripple and Allows Ceramic Output
    Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7.0 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 70 mΩ (High Side) and 53 mΩ (Low Side)
  • High Efficiency, Less Than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 650-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Auto-Skip Eco-mode™ for High Efficiency at Light
    Load

The TPS54428 is an adaptive on-time D-CAP2™ mode synchronous buck converter.

The TPS54428 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution.

The main control loop for the TPS54428 uses the D-CAP2™ mode control that provides a fast transient response with no external compensation components.

The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads.

Eco-mode™ allows the TPS54428 to maintain high efficiency during lighter load conditions.

The TPS54428 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input.

The output voltage can be programmed between 0.76 V and 7.0 V.

The device also features an adjustable soft start time.

The TPS54428 is available in 8-pin DDA package and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

The TPS54428 is an adaptive on-time D-CAP2™ mode synchronous buck converter.

The TPS54428 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution.

The main control loop for the TPS54428 uses the D-CAP2™ mode control that provides a fast transient response with no external compensation components.

The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads.

Eco-mode™ allows the TPS54428 to maintain high efficiency during lighter load conditions.

The TPS54428 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input.

The output voltage can be programmed between 0.76 V and 7.0 V.

The device also features an adjustable soft start time.

The TPS54428 is available in 8-pin DDA package and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

Descargar Ver vídeo con transcripción Video

Productos similares que pueden interesarle

open-in-new Comparar alternativas
Pin por pin con la misma funcionalidad que el dispositivo comparado
TPS54528 ACTIVO Convertidor reductor sincrónico de entrada de 4.5 V a 18 V y 5 A con Eco-mode™ This product offers higher current (5 A).
TPS54328 ACTIVO Convertidor reductor síncrono de 3 A, entrada de 4.5 V a 18 V, con Eco-Mode™ This product offers lower current (3 A).
Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
TLV62595 ACTIVO Convertidor reductor de 4 A c/ entrada de 2.5 V a 5.5 V, precisión del 1 % en QFN de 1.5 mm × 1.5 mm Newer generation of TPS54418
Funcionalidad similar a la del dispositivo comparado
TPS564252 ACTIVO Tensión de entrada de 3 V a 17 V, modo ECO de 4 A, convertidor reductor síncrono This product has smaller package and power good feature
TPS564242 ACTIVO Convertidor buck sincrónico en modo ECO de 4 A con tensión de entrada de 3 V a 16 V en encapsulado S This product has a smaller package with 1.2MHz switching frequency

Documentación técnica

No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 3
Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos TPS54428 4.5-V to 18-V Input, 4-A Synchronous Step-Down Converter With Eco-Mode™ datasheet (Rev. D) PDF | HTML 20/01/2016
Nota sobre la aplicación Optimize Output Filter on D-CAP2 for Stability Improvement 13/06/2017
Nota sobre la aplicación D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- 2/01/2013

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

TPS54428EVM-052 — Módulo de evaluación para convertidor reductor síncrono TPS54428 con Eco-Mode de salto automático

The TPS54428EVM-052 is a fully assembled and tested circuit for evaluating the TPS54428 synchronous step-down converter. The EVM operates from a 4.5-V to 18-V input and provides a 1.05-V output up to 4 A. The main control loop of TPS54428 uses D-CAP2™ mode control, which provides a very fast (...)

Guía del usuario: PDF | HTML
Productos y hardware compatibles
En inventario
Límite:
??asset.out-of-stock-ti_es_MX??
No disponible
Modelo de simulación

TPS54428 PSpice Transient Model

SLVM455.ZIP (91 KB) - Modelo PSpice
Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
HSOIC (DDA) 8 Ultra Librarian
VSON (DRC) 10 Ultra Librarian

Pedidos y calidad

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

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 alguna pregunta sobre calidad, encapsulados o pedido de productos de TI, consulte el servicio de asistencia de TI. ​​​​​​​​​​​​​​

Videos