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TPS546E25

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4V to 18V input, 50A, stackable PMBus synchronous step-down converter

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Data sheet

TPS546E25

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Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 50 Vin (min) (V) 4 Vin (max) (V) 18 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2000 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Extended security, Forced PWM, Over Current Protection, PMBUS, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable, Voltage Margining Control mode D-CAP4 Vout (min) (V) 0.4 Vout (max) (V) 5.5 Iq (typ) (µA) 7500 Duty cycle (max) (%) 85
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 50 Vin (min) (V) 4 Vin (max) (V) 18 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2000 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Extended security, Forced PWM, Over Current Protection, PMBUS, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable, Voltage Margining Control mode D-CAP4 Vout (min) (V) 0.4 Vout (max) (V) 5.5 Iq (typ) (µA) 7500 Duty cycle (max) (%) 85
WQFN-FCRLF (RXX) 37 30 mm² 6 x 5
  • 4V to 18V input voltage without external bias
  • 2.7V to 18V input voltage with external bias
  • 0.4V to 5.5V output voltage
  • Supports 50A single-phase or 2 ×, 3 ×, or 4 × stacked configurations
  • Rdson_HS = 2.9mΩ, Rdson_LS = 1mΩ
  • 400kHz to 2MHz operating frequency (four discrete settings through pinstrap, additional settings through PMBus)
  • PMBus programmability
    • Revision 1.5 Compliant with PASSKEY security feature
    • Input voltage, output voltage, output current, temperature telemetry
    • Programmable overcurrent, overvoltage, undervoltage, overtemperature protections
    • Includes single command write function in stacked configuration
    • Extended write protection feature
    • Non-volatile memory to store configuration settings

  • Two methods for programming the output voltage

    • Internal resistor divider (discrete settings), with boot-up voltage selected by pin strapping
    • External resistor divider (continuous settings), with boot-up voltage selected by VBOOT field
  • Precision voltage reference and differential remote sense for high output accuracy
    • +/– 0.5% DAC accuracy from 0°C to 85°C junction
    • +/– 1% VOUT tolerance from –40°C to 125°C junction
  • Selectable FCCM/DCM in single phase only
  • Start-up without PMBus communication through pin strapping
  • Safe start-up into prebiased output
  • Programmable soft-start time from 0.5ms to 16ms
  • Programmable soft-stop time from 0.5ms to 4ms
  • D-CAP4 control topology with fast transient response, supporting all ceramic output capacitors
  • Programmable internal loop compensation
  • Selectable cycle-by-cycle valley current limit
  • Open-drain power-good output
  • 4V to 18V input voltage without external bias
  • 2.7V to 18V input voltage with external bias
  • 0.4V to 5.5V output voltage
  • Supports 50A single-phase or 2 ×, 3 ×, or 4 × stacked configurations
  • Rdson_HS = 2.9mΩ, Rdson_LS = 1mΩ
  • 400kHz to 2MHz operating frequency (four discrete settings through pinstrap, additional settings through PMBus)
  • PMBus programmability
    • Revision 1.5 Compliant with PASSKEY security feature
    • Input voltage, output voltage, output current, temperature telemetry
    • Programmable overcurrent, overvoltage, undervoltage, overtemperature protections
    • Includes single command write function in stacked configuration
    • Extended write protection feature
    • Non-volatile memory to store configuration settings

  • Two methods for programming the output voltage

    • Internal resistor divider (discrete settings), with boot-up voltage selected by pin strapping
    • External resistor divider (continuous settings), with boot-up voltage selected by VBOOT field
  • Precision voltage reference and differential remote sense for high output accuracy
    • +/– 0.5% DAC accuracy from 0°C to 85°C junction
    • +/– 1% VOUT tolerance from –40°C to 125°C junction
  • Selectable FCCM/DCM in single phase only
  • Start-up without PMBus communication through pin strapping
  • Safe start-up into prebiased output
  • Programmable soft-start time from 0.5ms to 16ms
  • Programmable soft-stop time from 0.5ms to 4ms
  • D-CAP4 control topology with fast transient response, supporting all ceramic output capacitors
  • Programmable internal loop compensation
  • Selectable cycle-by-cycle valley current limit
  • Open-drain power-good output

The TPS546E25 device is a highly integrated, buck converter with D-CAP4 control topology for fast transient response. All programmable parameters can be configured by the PMBus interface and stored in NVM as the new default values to minimize the external component count. Pinstrap options allow for configuration as primary or secondary, stack position and stack number, DCM (single phase only) or FCCM, overcurrent limit, fault response, internal or external feedback resistor, output voltage selection or range, switching frequency, and compensation.

The PMBus interface with 1MHz clock support gives a convenient, standardized digital interface for configuration as well as telemetry of key parameters including output voltage, output current, and internal die temperature. Response to fault conditions can be set to restart, latch off, or ignore, depending on system requirements. Two, three, and four TPS546E25 devices can be interconnected to provide up to 200A on a single output.

The device has an option to overdrive the internal 5V LDO with an external 5V supply through the VDRV and VCC pins to improve efficiency, reduce power dissipation, and enable start-up with a lower input voltage.

The TPS546E25 is a lead-free device and is RoHS compliant without exemption.

The TPS546E25 device is a highly integrated, buck converter with D-CAP4 control topology for fast transient response. All programmable parameters can be configured by the PMBus interface and stored in NVM as the new default values to minimize the external component count. Pinstrap options allow for configuration as primary or secondary, stack position and stack number, DCM (single phase only) or FCCM, overcurrent limit, fault response, internal or external feedback resistor, output voltage selection or range, switching frequency, and compensation.

The PMBus interface with 1MHz clock support gives a convenient, standardized digital interface for configuration as well as telemetry of key parameters including output voltage, output current, and internal die temperature. Response to fault conditions can be set to restart, latch off, or ignore, depending on system requirements. Two, three, and four TPS546E25 devices can be interconnected to provide up to 200A on a single output.

The device has an option to overdrive the internal 5V LDO with an external 5V supply through the VDRV and VCC pins to improve efficiency, reduce power dissipation, and enable start-up with a lower input voltage.

The TPS546E25 is a lead-free device and is RoHS compliant without exemption.
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Type Title Date
* Data sheet TPS546E25 4V to 18V Input, 50A , 4 × Stackable, Synchronous Buck Converter With PMBus and Telemetry datasheet PDF | HTML 12 Jul 2024
Application note TPS546E25 and TPS546C25 Advanced Product Errata PDF | HTML 31 Jul 2024
EVM User's guide TPS546E25EVM-1PH SWIFT™ Step-Down Converter Evaluation Module PDF | HTML 15 Jul 2024
Certificate TPS546E25EVM-1PH EU Declaration of Conformity (DoC) (Rev. A) 09 Jul 2024

Design & development

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Evaluation board

TPS546E25EVM-1PH — TPS546E25 evaluation module single phase

The TPS546E25 evaluation module (EVM) is a single phase buck design using the TPS546E25 device. The EVM is designed for a nominal 12V bus and to produce a regulated 1.2V output at up to 50A of load current. The TPS546E25EVM-1PH is designed to demonstrate operation of the TPS546E25 in a single (...)

User guide: PDF | HTML
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Evaluation board

USB-TO-GPIO2 — USB-TO-GPIO2 USB interface adapter evaluation module

This EVM serves as an interface adapter or a bridge between a host PC and one or multiple targeted devices through a standard type-A to mini-B USB cable. The communication between the USB interface adapter and the host PC is via USB, while the communication between the USB interface adapter and (...)
User guide: PDF | HTML
Not available on TI.com
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WQFN-FCRLF (RXX) 37 Ultra Librarian
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