TPS546A24A

ACTIVE

2.95-V to 18-V, stackable 10-A synchronous SWIFT™ buck converter with pin-strapping and PMBus

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 10 Vin (min) (V) 2.95 Vin (max) (V) 18 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, PMBus, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Telemetry, UVLO adjustable, Voltage Margining Control mode current mode Vout (min) (V) 0.25 Vout (max) (V) 5.5 Iq (typ) (µA) 9000 Duty cycle (max) (%) 85
Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 10 Vin (min) (V) 2.95 Vin (max) (V) 18 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, PMBus, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Telemetry, UVLO adjustable, Voltage Margining Control mode current mode Vout (min) (V) 0.25 Vout (max) (V) 5.5 Iq (typ) (µA) 9000 Duty cycle (max) (%) 85
LQFN-CLIP (RVF) 40 35 mm² 7 x 5
  • Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN (4-VIN VDD5 for switching)
  • Integrated 5.5-mΩ/1.8-mΩ MOSFETs
  • Average current mode control with selectable internal compensation
  • 2×, 3×, 4× stackable with current sharing up to 40 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 TPS546A24A With WEBENCH Power Designer
  • Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN (4-VIN VDD5 for switching)
  • Integrated 5.5-mΩ/1.8-mΩ MOSFETs
  • Average current mode control with selectable internal compensation
  • 2×, 3×, 4× stackable with current sharing up to 40 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 TPS546A24A With WEBENCH Power Designer

The TPS546A24A is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 10-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546A24A devices can be interconnected to provide up to 40 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 TPS546A24A 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 TPS546A24Aconverters 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 TPS546A24A is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 10-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546A24A devices can be interconnected to provide up to 40 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 TPS546A24A 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 TPS546A24Aconverters 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 TPS546A24A 2.95-V to 18-V, 10-A, up to 4x Stackable, PMBus Buck Cnvtr datasheet (Rev. A) 22 Sep 2020
Application note Point-of-Load Solutions for Network Interface Cards (NIC) PDF | HTML 08 Sep 2021
EVM User's guide TPS546A24A SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 27 Apr 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Certificate TPS546A24AEVM-1PH EU Declaration of Conformity (DoC) 30 Jul 2020
Technical article 3 big benefits of small cells PDF | HTML 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 PDF | HTML 30 Apr 2020
Technical article SoC power design: 3 steps to a thermally optimized power supply PDF | HTML 09 Mar 2020
Application note Powering the TPS546D24A Device Family From a Single 3.3-V Input Power Supply (Rev. A) 04 Mar 2020

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 — 40-A, 2-phase synchronous buck evaluation module

The TPS546B24AEVM-2PH evaluation module (EVM) is a 40-A, two-phase buck converter with two TPS546B24A devices. 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 via the (...)
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

TPS546D24SEVM-2PH — TPS546D24S evaluation module fixed frequency synchronous buck converter 2-phase with write lock

The TPS546D24SEVM-2PH evaluation module (EVM) is a 2-phase buck converter with two TPS546D24S devices providing a single 0.8 V output. The TPS546D24A device is a stackable synchronous buck converter with PMBus interface that can operate from a nominal 2.95 V to 16 V input supply. The device allows (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS546A24A IBIS Model

SLUM710.ZIP (98 KB) - IBIS Model
Simulation model

TPS546A24A PSpice Transient Model

SLUM714.ZIP (257 KB) - PSpice Model
Simulation model

TPS546B24A SIMPLIS Model

SLUM748.ZIP (1865 KB) - SIMPLIS Model
Calculation tool

SLUC686 TPS546x24A Compensation and Pin-Strap Resistor Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
TPS546A24A 2.95-V to 18-V, stackable 10-A synchronous SWIFT™ buck converter with pin-strapping and PMBus TPS546B24A 2.95-V to 18-V, stackable 20-A synchronous SWIFT™ buck converter with pin-strapping and PMBus TPS546D24A 2.95-V to 16-V, stackable 40-A synchronous SWIFT™ step-down converter with pin-strapping and PMBus®
Calculation tool

SLURB01 TPS546D24A TPS546B24A TPS546A24A Excel Calculator Tool and Checklist

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
TPS546A24A 2.95-V to 18-V, stackable 10-A synchronous SWIFT™ buck converter with pin-strapping and PMBus TPS546B24A 2.95-V to 18-V, stackable 20-A synchronous SWIFT™ buck converter with pin-strapping and PMBus TPS546D24A 2.95-V to 16-V, stackable 40-A synchronous SWIFT™ step-down converter with pin-strapping and PMBus®
Package Pins CAD symbols, footprints & 3D models
LQFN-CLIP (RVF) 40 Ultra Librarian

Ordering & quality

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  • Ongoing reliability monitoring
Information included:
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