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TPS65253

ACTIVE

4.5V to 16V input, 2.5A/3.5A output Dual Buck Converter

Product details

Vin (min) (V) 4.5 Vin (max) (V) 16 Vout (min) (V) 0.8 Vout (max) (V) 15 Iout (max) (A) 3.5 Iq (typ) (mA) 0.6 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 Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 100 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 16 Vout (min) (V) 0.8 Vout (max) (V) 15 Iout (max) (A) 3.5 Iq (typ) (mA) 0.6 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 Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 100 Type Converter
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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Technical documentation

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Type Title Date
* 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 Jan 2013
Application note TPS65250/1/2/3 Output Filter Selection Guidelines 15 Jan 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS65253EVM — Evaluation Module for TPS65253 4.5V to 16V INPUT with 2 Buck Converters and Integrated FETS

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 (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS65253 TINA-TI Average Reference Design

SLVM307.TSC (1170 KB) - TINA-TI Reference Design
Simulation model

TPS65253 TINA-TI Average Spice Model

SLVM308.ZIP (8 KB) - TINA-TI Spice Model
Simulation model

TPS65253 Unencrypted PSpice Average Model Package (Rev. A)

SLVM515A.ZIP (148 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
VQFN (RHD) 28 View options

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