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TPS546D24

ACTIVE

2.95-V to 16-V, stackable 40-A synchronous SWIFT™ buck converter with PMBus

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Data sheet

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TPS546D24A ACTIVE 2.95-V to 16-V, stackable 40-A synchronous SWIFT™ step-down converter with pin-strapping and PMBus® Includes MSEL programming enhancements to set switching frequency, internal compensation parameters, and more.

TPS546D24

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 40 Vin (max) (V) 16 Vin (min) (V) 2.95 Vout (max) (V) 5.5 Vout (min) (V) 0.25 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, I2C, Overcurrent protection, Phase Interleaving, Power good, Prebias startup, Soft-start adjustable, Synchronous rectification, UVLO adjustable, Voltage Margining Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.009 Duty cycle (max) (%) 85
Rating Catalog Topology Buck Iout (max) (A) 40 Vin (max) (V) 16 Vin (min) (V) 2.95 Vout (max) (V) 5.5 Vout (min) (V) 0.25 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, I2C, Overcurrent protection, Phase Interleaving, Power good, Prebias startup, Soft-start adjustable, Synchronous rectification, UVLO adjustable, Voltage Margining Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.009 Duty cycle (max) (%) 85
LQFN-CLIP (RVF) 40 35 mm² 7 x 5
  • Split Rail Support: 2.95-V to 16-V PVIN;
    2.95-V to 18-V AVIN (4-VIN VDD5 for Switching)
  • Integrated 4.5-mΩ/0.9-mΩ MOSFETs
  • Average Current Mode Control With Selectable Internal Compensation
  • 2×, 3x, 4× Stackable With Current Sharing up to 160 A, Supporting a Single Address per Output
  • Selectable 0.6-V to 5.5-V Output via Pin Strap or 0.25-V to 5.5-V via PMBus VOUT_COMMAND
  • Extensive PMBus Command Set With Telemetry for VOUT, IOUT and Internal Die Temperature
  • Differential Remote Sensing With Internal FB Divider for < 1% VOUT Error –40°C to +150°C TJ
  • AVS and Margining Capabilities Through PMBus
  • MSEL Pins Pin Programming PMBus Defaults
  • 12 Selectable Switching Frequencies from 225 kHz to 1.5 MHz (8 Pin-Strap Options)
  • Frequency Sync In/Sync Out
  • Supports Prebiased Output
  • Supports Strongly Coupled Inductor
  • 7 mm × 5 mm × 1.5 mm, 40-pin QFN,
    Pitch = 0.5 mm
  • Create a Custom Design Using the TPS546D24 With WEBENCH® Power Designer
  • Split Rail Support: 2.95-V to 16-V PVIN;
    2.95-V to 18-V AVIN (4-VIN VDD5 for Switching)
  • Integrated 4.5-mΩ/0.9-mΩ MOSFETs
  • Average Current Mode Control With Selectable Internal Compensation
  • 2×, 3x, 4× Stackable With Current Sharing up to 160 A, Supporting a Single Address per Output
  • Selectable 0.6-V to 5.5-V Output via Pin Strap or 0.25-V to 5.5-V via PMBus VOUT_COMMAND
  • Extensive PMBus Command Set With Telemetry for VOUT, IOUT and Internal Die Temperature
  • Differential Remote Sensing With Internal FB Divider for < 1% VOUT Error –40°C to +150°C TJ
  • AVS and Margining Capabilities Through PMBus
  • MSEL Pins Pin Programming PMBus Defaults
  • 12 Selectable Switching Frequencies from 225 kHz to 1.5 MHz (8 Pin-Strap Options)
  • Frequency Sync In/Sync Out
  • Supports Prebiased Output
  • Supports Strongly Coupled Inductor
  • 7 mm × 5 mm × 1.5 mm, 40-pin QFN,
    Pitch = 0.5 mm
  • Create a Custom Design Using the TPS546D24 With WEBENCH® Power Designer

The TPS546D24 is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 40-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546D24 devices can be interconnected to provide up to 160 A on a single output. The device has an option to overdrive the internal 5-V LDO with an external 5-V supply via the VDD5 pin to improve efficiency and reduce power dissipation of the converter.

The TPS546D24 uses a proprietary fixed-frequency current-mode control with input feedforward and selectable internal compensation components for minimal size and stability over a wide range of output capacitances.

The PMBus interface with 1-MHz clock support gives a convenient, standardized digital interface for converter configuration as well as monitoring 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. Back-channel communication between stacked devices enables all TPS546D24 converters powering a single output rail to share a single address to simplify system software/firmware design. Key parameters including output voltage, switching frequency, soft-start time, and overcurrent fault limits can also be configured through BOM selection without PMBus communication to support program free power-up.

The TPS546D24 is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 40-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546D24 devices can be interconnected to provide up to 160 A on a single output. The device has an option to overdrive the internal 5-V LDO with an external 5-V supply via the VDD5 pin to improve efficiency and reduce power dissipation of the converter.

The TPS546D24 uses a proprietary fixed-frequency current-mode control with input feedforward and selectable internal compensation components for minimal size and stability over a wide range of output capacitances.

The PMBus interface with 1-MHz clock support gives a convenient, standardized digital interface for converter configuration as well as monitoring 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. Back-channel communication between stacked devices enables all TPS546D24 converters powering a single output rail to share a single address to simplify system software/firmware design. Key parameters including output voltage, switching frequency, soft-start time, and overcurrent fault limits can also be configured through BOM selection without PMBus communication to support program free power-up.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS546D24 2.95-V to 16-V, 40-A, up to 4× Stackable, PMBus Buck Converter datasheet (Rev. A) PDF | HTML 04 Dec 2018
Application note DC/DC Converter Solutions for Hardware Accelerators in Data Center Applications (Rev. A) PDF | HTML 04 May 2021
Technical article 3 big benefits of small cells PDF | HTML 26 May 2020
Application note Powering the TPS546D24A Device Family From a Single 3.3-V Input Power Supply (Rev. A) 04 Mar 2020
Application note Point-of-Load Solutions for Data Center App Implementing VR13.HC Vccin Spec (Rev. A) PDF | HTML 08 Jan 2020
Application note Achieving Better than 1% Output Voltage Accuracy with TPS546D24A 01 Dec 2019
White paper Small Cells, Big Impact: Designing Power Soutions for 5G Applications 26 Jun 2019
Application note Programming the NVM of PMBus Buck Converters to Support Mass-Production Needs (Rev. B) 13 May 2019
Application note DC/DC Point-of-load Power Solutions for Wired Networking Switch Systems 11 Dec 2018

Design & development

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Evaluation board

TPS546D24EVM-856 — 40-A fixed frequency non-compensation stackable synchronous buck converters evaluation module

The TPS546D24AEVM-2PH evaluation module is a two-phase interleaved power supply with two TPS546D24 devices on the board. The design provides a regulated 0.8-V output up to 80-A DC steady-state output current. The device allows programming and monitoring via the PMBus interface. Output current is (...)

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Simulation model

TPS546D24 Non-Inverting and Inverting PSpice Transient Model

SLUM659.ZIP (230 KB) - PSpice Model
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Simulation model

TPS546D24 PSPICE AVERAGE MODEL

SLUM692.ZIP (69 KB) - PSpice Model
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LQFN-CLIP (RVF) 40 Ultra Librarian
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