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TPS546D24A

ACTIVE

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

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Data sheet

TPS546D24A

ACTIVE
Data sheet Order now

Product details

Vin (Min) (V) 2.95 Vin (Max) (V) 16 Vout (Min) (V) 0.25 Vout (Max) (V) 5.5 Iout (Max) (A) 40 Iq (Typ) (uA) 9000 Switching frequency (Min) (kHz) 225 Switching frequency (Max) (kHz) 1500 Features Adaptive/Dynamic Voltage Scaling, Adjustable Current Limit, Differential Remote Sense, Enable, Forced PWM, Frequency Synchronization, Over Current Protection, I2C/PMBus, Phase Interleaving, Power Good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO Adjustable, Voltage Margining Rating Catalog Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 85
Vin (Min) (V) 2.95 Vin (Max) (V) 16 Vout (Min) (V) 0.25 Vout (Max) (V) 5.5 Iout (Max) (A) 40 Iq (Typ) (uA) 9000 Switching frequency (Min) (kHz) 225 Switching frequency (Max) (kHz) 1500 Features Adaptive/Dynamic Voltage Scaling, Adjustable Current Limit, Differential Remote Sense, Enable, Forced PWM, Frequency Synchronization, Over Current Protection, I2C/PMBus, Phase Interleaving, Power Good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO Adjustable, Voltage Margining Rating Catalog Regulated outputs (#) 1 Control mode Current Mode 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×, 3×, 4× stackable with current sharing up to 160 A, supporting a single address per output
  • Selectable 0.5-V to 5.5-V output via pin strap or 0.25-V to 5.5-V using 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 TPS546D24A 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×, 3×, 4× stackable with current sharing up to 160 A, supporting a single address per output
  • Selectable 0.5-V to 5.5-V output via pin strap or 0.25-V to 5.5-V using 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 TPS546D24A With WEBENCH Power Designer

The TPS546D24A 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 TPS546D24A 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 TPS546D24A 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 TPS546D24A 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 TPS546D24A 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 TPS546D24A 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 TPS546D24A 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 TPS546D24A 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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Type Title Date
* Data sheet TPS546D24A 2.95-V to 16-V, 40-A, up to 4x Stackable, PMBus Buck Converter datasheet (Rev. A) 05 Nov 2020
Application note Collection of DC/DC Buck Regulator Technical Documentation (Rev. A) PDF | HTML 28 Nov 2022
Application note Point-of-Load Solutions for Network Interface Cards (NIC) PDF | HTML 08 Sep 2021
EVM User's guide TPS546D24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 20 Aug 2021
Application note DC/DC Converter Solutions for Hardware Accelerators in Data Center Applications (Rev. A) PDF | HTML 04 May 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article 3 big benefits of small cells 26 May 2020
Application note Minimize On-Time-Jitter and Ripple by Optimizing Compensation 11 May 2020
Technical article Advantages of scalability: from Peter Parker to pin-strapping 30 Apr 2020
Technical article SoC power design: 3 steps to a thermally optimized power supply 09 Mar 2020
Application note Powering the TPS546D24A Device Family From a Single 3.3-V Input Power Supply (Rev. A) 04 Mar 2020
Technical article 35 years later, APEC continues to set the tone for innovation in power management 27 Feb 2020
White paper Power solution options for data center applications (Rev. A) 27 Feb 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

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS546A24AEVM-1PH — 2.95-V to 18-V, 10-A synchronous buck evaluation module

The TPS546A24AEVM-1PH is an evaluation module (EVM) for the TPS546A24A 10-A buck converter. The TPS546A24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the PMBus interface.
User guide: PDF | HTML
Not available on TI.com
Evaluation board

TPS546B24AEVM-1PH — 2.95-V to 18-V, 20-A synchronous buck evaluation module

The TPS546B24AEVM-1PH is an evaluation module (EVM) for the TPS546B24A 20-A buck converter. The TPS546B24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the PMBus interface.
User guide: PDF | HTML
Not available on TI.com
Evaluation board

TPS546D24AEVM — Fixed frequency synchronous buck converter 2-phase evaluation module

The TPS546D24AEVM-2PH evaluation module (EVM) is a two-phase buck converter with two TPS546D24A devices. The TPS546D24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 16-V supply. The device allows programming and monitoring via the PMBus (...)
User guide: PDF | HTML
Not available on TI.com
Application software & framework

FUSION_DIGITAL_POWER_DESIGNER — Digital Power Software

Fusion Digital Power™ graphical user interface (GUI) software is used to configure and monitor select Texas Instruments digital power controllers and sequencer/health monitors. The application uses the PMBus protocol to communicate with the device over serial bus by way of a TI USB adapter.
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Simulation model

TPS546D24A IBIS Model

SLUM704.ZIP (98 KB) - IBIS Model
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Simulation model

TPS546D24A PSpice Average Model

SLUM705.ZIP (69 KB) - PSpice Model
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Simulation model

TPS546D24A PSpice Transient Model

SLUM707.ZIP (257 KB) - PSpice Model
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Simulation model

TPS546D24A PSpice Two Phase Transient Model

SLUM708.ZIP (189 KB) - PSpice Model
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Simulation model

TPS546D24A SIMPLIS Transient and Average Model

SLUM725.ZIP (1791 KB) - SIMPLIS Model
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Calculation tool

TPS546x24A Compensation and Pin-Strap Resistor Calculator (Rev. A)

SLUC686A.ZIP (165 KB)
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Calculation tool

TPS546D24A TPS546B24A TPS546A24A Excel Calculator Tool and Checklist

SLURB01.ZIP (2227 KB)
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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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Reference designs

PMP21254 — 160-A, four-phase reference design with integrated FET controller

This reference design is for powering high current, low voltage ASICs and FPGAs from a 5-V or 12-V rail.  The design is optimized for high-density and supports PMBus with current, voltage and temperature telemetry, if desired.  A test report is included.
Test report: PDF
Schematic: PDF
Reference designs

PMP21814 — 4-Phase, 160-A synchronous buck converter reference design for communications processor power

This reference design uses four TPS546D24A converters with integrated MOSFETs to support a full load of 160A at a 0.9V output. The system operates at a switching frequency of 650 kHz and has a PMBus interface that can be used to configure key converter parameters, including internal compensation. (...)
Test report: PDF
Schematic: PDF
Package Pins Download
LQFN-CLIP (RVF) 40 View options

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