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TPS62684

ACTIVE

1600-mA, High-Efficiency Step-Down Converter optimized for small solution size

Product details

Vin (min) (V) 3.25 Vin (max) (V) 5.5 Vout (min) (V) 2.85 Vout (max) (V) 2.85 Iout (max) (A) 1.6 Iq (typ) (mA) 5.8 Switching frequency (min) (kHz) 3500 Switching frequency (max) (kHz) 5250 EMI features Spread Spectrum Features Enable, Light load efficiency, Output discharge, Spread Spectrum, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 100 Type Converter
Vin (min) (V) 3.25 Vin (max) (V) 5.5 Vout (min) (V) 2.85 Vout (max) (V) 2.85 Iout (max) (A) 1.6 Iq (typ) (mA) 5.8 Switching frequency (min) (kHz) 3500 Switching frequency (max) (kHz) 5250 EMI features Spread Spectrum Features Enable, Light load efficiency, Output discharge, Spread Spectrum, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 100 Type Converter
DSBGA (YFF) 6 1.4000000000000001 mm² 1 x 1.4000000000000001
  • VIN Range From 3.25V to 5.5V
  • Total Solution Size <12 mm2
  • Three Surface-Mount External Components Required
    (One 0805 MLCC Inductor, Two small Ceramic Capacitors)
  • Complete Sub 1-mm Component Profile Solution
  • Spread Spectrum, PWM Frequency Dithering
  • Best in Class Load and Line Transient
  • ±2% Total DC Voltage Accuracy
  • Up to 1600mA load current
  • 5.5MHz Regulated Frequency Operation
  • Available in a 6-Pin NanoFree (WCSP)
  • APPLICATIONS
    • Tablet PC
    • Cell Phones, Smart-Phones
    • Digital TV, WLAN, GPS and Bluetooth Applications
    • VIN Range From 3.25V to 5.5V
    • Total Solution Size <12 mm2
    • Three Surface-Mount External Components Required
      (One 0805 MLCC Inductor, Two small Ceramic Capacitors)
    • Complete Sub 1-mm Component Profile Solution
    • Spread Spectrum, PWM Frequency Dithering
    • Best in Class Load and Line Transient
    • ±2% Total DC Voltage Accuracy
    • Up to 1600mA load current
    • 5.5MHz Regulated Frequency Operation
    • Available in a 6-Pin NanoFree (WCSP)
  • APPLICATIONS
    • Tablet PC
    • Cell Phones, Smart-Phones
    • Digital TV, WLAN, GPS and Bluetooth Applications
  • The TPS62684 is a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications in which high load currents in a very small solution size and height are required. The TPS62684 is optimized for high efficiency and low output voltage ripple, supports up to 1600-mA load current and allows the use of low cost chip inductor and capacitors. With a input voltage range of 3.25V to 5.5V, the device supports applications powered by Li-Ion batteries as well as 5V rails.

    The TPS62684 operates at a 5.5-MHz switching frequency with PWM spread spectrum capability. For noise-sensitive applications, this provides a lower noise regulated output, as well as low noise at the input. The device supports a 2.85V fixed output voltage, requiring no external feedback network.

    These features, combined with high PSRR and AC load regulation performance, make this device suitable to replace a linear regulator to obtain better power conversion efficiency.

    The TPS62684 is a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications in which high load currents in a very small solution size and height are required. The TPS62684 is optimized for high efficiency and low output voltage ripple, supports up to 1600-mA load current and allows the use of low cost chip inductor and capacitors. With a input voltage range of 3.25V to 5.5V, the device supports applications powered by Li-Ion batteries as well as 5V rails.

    The TPS62684 operates at a 5.5-MHz switching frequency with PWM spread spectrum capability. For noise-sensitive applications, this provides a lower noise regulated output, as well as low noise at the input. The device supports a 2.85V fixed output voltage, requiring no external feedback network.

    These features, combined with high PSRR and AC load regulation performance, make this device suitable to replace a linear regulator to obtain better power conversion efficiency.

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    Technical documentation

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    Type Title Date
    * Data sheet TPS62684 1600-mA, High-Efficiency Step-Down Converter Optimized for Smallest Solution Size datasheet PDF | HTML 31 Mar 2014
    Analog Design Journal Understanding 100% mode in low-power DC/DC converters 22 Jun 2018
    Analog Design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold 24 Oct 2017
    Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 24 Oct 2016
    Analog Design Journal Five steps to a great PCB layout for a step-down converter 29 Jan 2015
    EVM User's guide TPS62684EVM-647 User's Guide 08 Apr 2014
    Application note Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) 13 Jan 2012
    Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011

    Design & development

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    Evaluation board

    TPS62684EVM-647 — 1.6-A Step Down (Buck) Converter Evaluation Module

    The TPS62684EVM-647 is designed to help the user easily evaluate and test the operation and functionality of the TPS62684. The EVM converts up to a 5.5-V input voltage to a 2.85-V regulated output voltage at up to 1.6A of output current. The TPS62684 supports a total solution size of 12 mm2.

    User guide: PDF
    Not available on TI.com
    Gerber file

    PWR647 gerbers

    SLVC568.ZIP (182 KB)
    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 (...)
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    DSBGA (YFF) 6 View options

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