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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®

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Data sheet

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TPS546D24S ACTIVE 2.95-V to 16-V, stackable 40-A synchronous SWIFT™ step-down PMBus® converter with extended security Extended write protection

TPS546D24A

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 40 Vin (min) (V) 2.95 Vin (max) (V) 16 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) 40 Vin (min) (V) 2.95 Vin (max) (V) 16 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 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
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Application brief Solving power design challenges in oscilloscope applications PDF | HTML 31 Oct 2023
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 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
Technical article 35 years later, APEC continues to set the tone for innovation in power management PDF | HTML 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

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