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TPS568231

ACTIVE

3.8-V to 17-V, 8-A synchronous buck converter with D-CAP3 control

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Data sheet

TPS568231

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 8 Vin (max) (V) 17 Vin (min) (V) 3.8 Vout (max) (V) 6 Vout (min) (V) 0.6 Features Enable, Forced PWM, Light Load Efficiency, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP3 Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000148 Duty cycle (max) (%) 90 Sector Test & measurement
Rating Catalog Topology Buck Iout (max) (A) 8 Vin (max) (V) 17 Vin (min) (V) 3.8 Vout (max) (V) 6 Vout (min) (V) 0.6 Features Enable, Forced PWM, Light Load Efficiency, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP3 Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000148 Duty cycle (max) (%) 90 Sector Test & measurement
VQFN-HR (RNN) 18 12.25 mm² 3.5 x 3.5
  • 4.5-V to 17-V input range without external bias
  • 3.8-V to 17-V input range with external bias
  • Supports 8-A continuous output current
  • Integrated 7.8-mΩ and 3.2-mΩ MOSFETs
  • 0.6-V ±1% reference voltage across a –40°C to 125°C junction range
  • 0.6-V to 5.5-V output voltage range
  • 146-µA low quiescent current
  • D-CAP3™ control mode for fast transient response
  • Supports ceramic output capacitors
  • Selectable fSW of 400 kHz, 800 kHz, and 1200 kHz
  • Selectable FCCM (forced continuous conduction mode) for tight output voltage ripple
  • Selectable Eco-mode™ (auto skip mode) for high light-load efficiency
  • Optional external 5-V bias for enhanced efficiency
  • Prebiased start-up capability
  • Adjustable soft start with a default 1.2-ms soft-start time
  • Power-good indicator to monitor output voltage
  • Two adjustable current limit settings with hiccup restart
  • Non-latched protections for UV, OV, OT, and UVLO
  • Pin-to-pin compatible with 8-A TPS568215, and 12-A TPS56C231 and TPS56C215
  • –40°C to 125°C operating junction temperature
  • 3.5-mm × 3.5-mm, 18-pin HotRod™ QFN package
  • 4.5-V to 17-V input range without external bias
  • 3.8-V to 17-V input range with external bias
  • Supports 8-A continuous output current
  • Integrated 7.8-mΩ and 3.2-mΩ MOSFETs
  • 0.6-V ±1% reference voltage across a –40°C to 125°C junction range
  • 0.6-V to 5.5-V output voltage range
  • 146-µA low quiescent current
  • D-CAP3™ control mode for fast transient response
  • Supports ceramic output capacitors
  • Selectable fSW of 400 kHz, 800 kHz, and 1200 kHz
  • Selectable FCCM (forced continuous conduction mode) for tight output voltage ripple
  • Selectable Eco-mode™ (auto skip mode) for high light-load efficiency
  • Optional external 5-V bias for enhanced efficiency
  • Prebiased start-up capability
  • Adjustable soft start with a default 1.2-ms soft-start time
  • Power-good indicator to monitor output voltage
  • Two adjustable current limit settings with hiccup restart
  • Non-latched protections for UV, OV, OT, and UVLO
  • Pin-to-pin compatible with 8-A TPS568215, and 12-A TPS56C231 and TPS56C215
  • –40°C to 125°C operating junction temperature
  • 3.5-mm × 3.5-mm, 18-pin HotRod™ QFN package

The TPS568231 is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP3 control mode. Because external compensation is not required, the device is easy to use and requires few external components. The device is well-suited for space-constrained data center applications.

The TPS568231 has competitive features including a very accurate reference voltage, fast load transient response, and no requirement for external compensation, adjustable current limit, and both Eco-mode and FCCM operation modes for selection at light-load condition through configuration of MODE pin. To attain high efficiency at light load, Eco-mode can be selected. To support tight output voltage ripple requirement, FCCM can be selected. The TPS568231 operates from –40°C to 125°C junction temperature.

The TPS568231 is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP3 control mode. Because external compensation is not required, the device is easy to use and requires few external components. The device is well-suited for space-constrained data center applications.

The TPS568231 has competitive features including a very accurate reference voltage, fast load transient response, and no requirement for external compensation, adjustable current limit, and both Eco-mode and FCCM operation modes for selection at light-load condition through configuration of MODE pin. To attain high efficiency at light load, Eco-mode can be selected. To support tight output voltage ripple requirement, FCCM can be selected. The TPS568231 operates from –40°C to 125°C junction temperature.
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Technical documentation

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* Data sheet TPS568231 3.8-V to 17-V Input , 8-A Synchronous Step-Down Converter datasheet PDF | HTML 10 Oct 2022
Application brief Solving Power Design Challenges in Enterprise SSD Applications PDF | HTML 23 Sep 2024
Application brief Solving power design challenges in oscilloscope applications PDF | HTML 31 Oct 2023
Certificate TPS568231EVM EU RoHS Declaration of Conformity (DoC) 30 Sep 2022

Design & development

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Evaluation board

TPS568231EVM — TPS568231 step-down converter evaluation module

The TPS568231 is a single, D-CAP3™ mode, synchronous buck converter requiring a very low external component count. The TPS568231 evaluation module (EVM) is a single, synchronous buck converter providing 1.2-V at 8-A from 4.5-V to 17-V input. This user’s guide describes the TPS568231EVM performance.
User guide: PDF | HTML
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