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TPS546B24A

ACTIVE

2.95-V to 18-V, stackable 20-A synchronous SWIFT™ buck converter with pin-strapping and PMBus

Product details

Vin (min) (V) 2.95 Vin (max) (V) 18 Vout (min) (V) 0.25 Vout (max) (V) 5.5 Iout (max) (A) 20 Iq (typ) (mA) 9 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, I2C/PMBus, Over Current Protection, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable, Voltage Margining Operating temperature range (°C) -40 to 150 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 85 Type Converter
Vin (min) (V) 2.95 Vin (max) (V) 18 Vout (min) (V) 0.25 Vout (max) (V) 5.5 Iout (max) (A) 20 Iq (typ) (mA) 9 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, I2C/PMBus, Over Current Protection, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable, Voltage Margining Operating temperature range (°C) -40 to 150 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 85 Type Converter
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 80 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 TPS546B24A 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 80 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 TPS546B24A With WEBENCH Power Designer

The TPS546B24A is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 20-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546B24A devices can be interconnected to provide up to 80 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 TPS546B24A 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 TPS546B24Aconverters 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 TPS546B24A is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 20-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546B24A devices can be interconnected to provide up to 80 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 TPS546B24A 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 TPS546B24Aconverters 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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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
Simulation model

TPS546B24A IBIS Model

SLUM709.ZIP (98 KB) - IBIS Model
Simulation model

TPS546B24A PSpice Transient Model

SLUM713.ZIP (258 KB) - PSpice Model
Simulation model

TPS546B24A SIMPLIS Transient and Average Model

SLUM750.ZIP (1784 KB) - SIMPLIS Model
Simulation model

TPS546B24A Unencrypted PSpice Average Model Package (Rev. A)

SLUM715A.ZIP (72 KB) - PSpice Model
Calculation tool

SLUC686 TPS546x24A Compensation and Pin-Strap Resistor Calculator

Supported products & hardware

Supported products & hardware

Products
Buck converters (integrated switch)
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
Buck converters (integrated switch)
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®
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 (...)
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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