Inicio Gestión de la energía Convertidores de CA/CC y CC/CC (FET integrado)

TPS65253

ACTIVO

Convertidor reductor doble con entrada de 4.5 V a 16 V y salida de 2.5 A/3.5 A

Detalles del producto

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 3.5 Vin (min) (V) 4.5 Vin (max) (V) 16 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1500 Features Adjustable current limit, Enable, Light Load Efficiency, Power good, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 15 Iq (typ) (µA) 600 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 3.5 Vin (min) (V) 4.5 Vin (max) (V) 16 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1500 Features Adjustable current limit, Enable, Light Load Efficiency, Power good, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 15 Iq (typ) (µA) 600 Duty cycle (max) (%) 100
VQFN (RHD) 28 25 mm² 5 x 5
  • Wide Input Supply Voltage Range:
    4.5 V – 16 V
  • Output Range: 0.8 V to ~VIN–1 V
  • Fully Integrated Dual Buck, 3.5-A/2.5-A Continuous Current
    (4-A/3-A Maximum Current)
  • High Efficiency
  • 300-kHz – 1.2-MHz Switching Frequency Set by External Resistor
  • External Eenable/Sequencing Pins
  • Adjustable Cycle-by-Cycle Current Limit Set by External Resistor
  • Soft-Start Pins
  • Current-Mode Control With Simple Compensation Circuit
  • Power Good and Reset Generator
  • Low Power Mode Set By External Signal
  • Supervisory Circuit
  • QFN Package, 28-Pin 5 mm × 5 mm RHD
  • APPLICATIONS
    • DTV
    • DSL Modems
    • Cable Modems
    • Set Top Boxes
    • Car DVD Players
    • Home Gateway and Access Point Networks
    • Wireless Routers

  • Wide Input Supply Voltage Range:
    4.5 V – 16 V
  • Output Range: 0.8 V to ~VIN–1 V
  • Fully Integrated Dual Buck, 3.5-A/2.5-A Continuous Current
    (4-A/3-A Maximum Current)
  • High Efficiency
  • 300-kHz – 1.2-MHz Switching Frequency Set by External Resistor
  • External Eenable/Sequencing Pins
  • Adjustable Cycle-by-Cycle Current Limit Set by External Resistor
  • Soft-Start Pins
  • Current-Mode Control With Simple Compensation Circuit
  • Power Good and Reset Generator
  • Low Power Mode Set By External Signal
  • Supervisory Circuit
  • QFN Package, 28-Pin 5 mm × 5 mm RHD
  • APPLICATIONS
    • DTV
    • DSL Modems
    • Cable Modems
    • Set Top Boxes
    • Car DVD Players
    • Home Gateway and Access Point Networks
    • Wireless Routers

The TPS65253 features two synchronous wide input range high efficiency buck converters. The converters are designed to simplify product application while giving designers the options to optimize their usage according to the target application.

The converters can operate in 5-, 9- and 12-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and the input supply minus 1 V. Each converter features an enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit (RLIMx) pin that enables designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The CMP pin allows optimizing transient versus dc accuracy response with a simple RC compensation.

The switching frequency of the converters is set by an external resistor connected to ROSC pin. The switching regulators are designed to operate from 300 kHz to 1.2 MHz. The converters operate with 180° phase between then to minimize the input filter requirements.

TPS65253 also features a low power mode enabled by an external signal, which allows for a reduction on the input power supplied to the system when the host processor is in stand-by (low activity) mode.

TPS65253 features a supervisor circuit that monitors both converters and provides a PGOOD signal (End of Reset) with a 32-ms timer.

TPS65253 is packaged in a small, thermally efficient 28-pin QFN package.

The TPS65253 features two synchronous wide input range high efficiency buck converters. The converters are designed to simplify product application while giving designers the options to optimize their usage according to the target application.

The converters can operate in 5-, 9- and 12-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and the input supply minus 1 V. Each converter features an enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit (RLIMx) pin that enables designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The CMP pin allows optimizing transient versus dc accuracy response with a simple RC compensation.

The switching frequency of the converters is set by an external resistor connected to ROSC pin. The switching regulators are designed to operate from 300 kHz to 1.2 MHz. The converters operate with 180° phase between then to minimize the input filter requirements.

TPS65253 also features a low power mode enabled by an external signal, which allows for a reduction on the input power supplied to the system when the host processor is in stand-by (low activity) mode.

TPS65253 features a supervisor circuit that monitors both converters and provides a PGOOD signal (End of Reset) with a 32-ms timer.

TPS65253 is packaged in a small, thermally efficient 28-pin QFN package.

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Documentación técnica

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Tipo Título Fecha
* Data sheet 4.5 V - 16 V IN, HIGH CURRENT, SYNCH. STEP DOWN DUAL BUCK CONVERTER w/ Int FETS datasheet 15 jun 2011
EVM User's guide TPS65253 Buck Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 26 may 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Application note TPS65250/1/2/3 LAYOUT GUIDE 15 ene 2013
Application note TPS65250/1/2/3 Output Filter Selection Guidelines 15 ene 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

TPS65253EVM — Módulo de evaluación TPS65253 para 2 convertidores reductores con ENTRADA de 4.5 V a 16 V y FETS int

The TPS65253EVM is a high current, synchronous step down two buck switcher evaluation module. This evaluation module is designed to provide access to the features of the TPS65253. Some modifications can be made to this module to test performance at different input and output voltages, current and (...)

Guía del usuario: PDF | HTML
Modelo de simulación

TPS65253 TINA-TI Average Reference Design

SLVM307.TSC (1170 KB) - TINA-TI Reference Design
Modelo de simulación

TPS65253 TINA-TI Average Spice Model

SLVM308.ZIP (8 KB) - TINA-TI Spice Model
Modelo de simulación

TPS65253 Unencrypted PSpice Average Model Package (Rev. A)

SLVM515A.ZIP (148 KB) - PSpice Model
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RHD) 28 Ultra Librarian

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.

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