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TPS56C231

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3.8-V to 17-V, 12-A synchronous buck converter with D-CAP3 control

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Data sheet

TPS56C231

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 3.8 Vin (max) (V) 17 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1200 Features Adjustable current limit, Enable, Forced PWM, Light Load Efficiency, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 6 Iq (typ) (µA) 148 Duty cycle (max) (%) 90
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 3.8 Vin (max) (V) 17 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 1200 Features Adjustable current limit, Enable, Forced PWM, Light Load Efficiency, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 6 Iq (typ) (µA) 148 Duty cycle (max) (%) 90
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 12-A continuous output current
  • TPS56C231 supports 15-A peak current
  • Integrated 7.8-mΩ and 3.2-mΩ MOSFETs
  • 0.6-V ±1% reference voltage across a –40°C to 125°C junction temperature 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: TPS56C231 (14.7 A, 17 A) and TPS56C231L (11.5 A, 13.8 A)
  • Non-latched protections for UV, OV, OT, and UVLO
  • Pin-to-pin compatible with 12-A TPS56C215, and 8-A TPS568231 and TPS568215
  • –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 12-A continuous output current
  • TPS56C231 supports 15-A peak current
  • Integrated 7.8-mΩ and 3.2-mΩ MOSFETs
  • 0.6-V ±1% reference voltage across a –40°C to 125°C junction temperature 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: TPS56C231 (14.7 A, 17 A) and TPS56C231L (11.5 A, 13.8 A)
  • Non-latched protections for UV, OV, OT, and UVLO
  • Pin-to-pin compatible with 12-A TPS56C215, and 8-A TPS568231 and TPS568215
  • –40°C to 125°C operating junction temperature
  • 3.5-mm × 3.5-mm, 18-pin HotRod™ QFN package

The TPS56C231 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 TPS56C231 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 the configuration of the 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 TPS56C231 operates from a –40°C to 125°C junction temperature range.

The TPS56C231 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 TPS56C231 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 the configuration of the 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 TPS56C231 operates from a –40°C to 125°C junction temperature range.
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Technical documentation

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* Data sheet TPS56C231 3.8-V to 17-V Input , 12-A Synchronous Step-Down Converter datasheet PDF | HTML 23 Aug 2022
Application brief Solving Power Design Challenges in Enterprise SSD Applications PDF | HTML 23 Sep 2024
Application note How to Extract Raw Data of DC/DC Converter Loop Response Bench and Simulation Te PDF | HTML 20 Oct 2022
EVM User's guide TPS56C231 Step-Down Converter Evaluation Module User's Guide PDF | HTML 18 Aug 2022
Certificate TPS56C231EVM EU RoHS Declaration of Conformity (DoC) 18 Aug 2022

Design & development

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Evaluation board

TPS56C231EVM — TPS56C231 step-down converter evaluation module

The TPS56C231 is a single, D-CAP3™ mode, synchronous buck converter requiring a very low external component count. The TPS56C231EVM evaluation module (EVM) is a single, synchronous buck converter providing 1.2-V at 12-A from 4.5-V to 17-V input.
User guide: PDF | HTML
Not available on TI.com
Evaluation board

TPS56C231LEVM — TPS56C231L step-down converter evaluation module

The TPS56C231L evaluation module (EVM) is a single, D-CAP3™ mode, synchronous buck converter providing 1.2-V at 12-A from 4.5-V to 17-V input, requiring a very low external component count. The EVM uses D-CAP3™ control mode to provide a fast transient response, good line, load regulation, no (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS56C231 PSPICE Model

SLVMDX6.ZIP (158 KB) - PSpice Model
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VQFN-HR (RNN) 18 Ultra Librarian
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