Home Power management DC/DC switching regulators Step-down (buck) regulators Buck converters (integrated switch)
NEW

TPS546B24S

ACTIVE

2.95-V to 16-V stackable 20-A synchronous SWIFT™ step-down PMBus converter with extended security

Product details

Vin (min) (V) 2.95 Vin (max) (V) 16 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) 16 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
  • Integrated extended security feature
  • Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN (4-V IN 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 through pin strap or 0.25-V to 5.5-V using PMBus VOUT_COMMAND
  • Extensive PMBus command set with telemetry for V OUT, I OUT, and internal die temperature
  • Differential remote sensing with an internal FB divider for < 1% V OUT error, –40°C to +150°C T J
  • 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
  • 7-mm × 5-mm × 1.5-mm, 40-pin QFN
  • Drop-in compatible with TPS546B24A
  • Create a Custom Design Using the TPS546B24S with WEBENCH Power Designer
  • Integrated extended security feature
  • Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN (4-V IN 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 through pin strap or 0.25-V to 5.5-V using PMBus VOUT_COMMAND
  • Extensive PMBus command set with telemetry for V OUT, I OUT, and internal die temperature
  • Differential remote sensing with an internal FB divider for < 1% V OUT error, –40°C to +150°C T J
  • 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
  • 7-mm × 5-mm × 1.5-mm, 40-pin QFN
  • Drop-in compatible with TPS546B24A
  • Create a Custom Design Using the TPS546B24S with WEBENCH Power Designer

The TPS546B24S is a highly integrated, non-isolated DC/DC converter that expands on the TPS546B24A by adding manufacturer-specific PMBus commands and Extended Write Protect and Passkey. This feature improves security against malicious access to the PMBus by restricting Write capability with greater resolution than the standard Write Protect command. TPS546B24S is capable of high frequency operation and 20-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546B24S 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 through the VDD5 pin to improve efficiency and reduce power dissipation of the converter.

The TPS546B24S 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 TPS546B24S 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 TPS546B24S is a highly integrated, non-isolated DC/DC converter that expands on the TPS546B24A by adding manufacturer-specific PMBus commands and Extended Write Protect and Passkey. This feature improves security against malicious access to the PMBus by restricting Write capability with greater resolution than the standard Write Protect command. TPS546B24S is capable of high frequency operation and 20-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546B24S 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 through the VDD5 pin to improve efficiency and reduce power dissipation of the converter.

The TPS546B24S 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 TPS546B24S 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.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet TPS546B24S2.95-V to18-V,20-A, Up to 4 × Stackable, SynchronousSWIFTStep-Down Converter withPMBusand Extended Write Protection datasheet PDF | HTML 14 Nov 2023
Application brief Using the Security Features Inside the TPS546x24S Family of Step-Down Converters and Modules (Rev. A) PDF | HTML 26 Feb 2024
Certificate TPS546B24SEVM-1PH EU Declaration of Conformity (DoC) 14 Jun 2023
Certificate TPS546B24SEVM-2PH EU Declaration of Conformity (DoC) 13 Jun 2023

Design & development

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

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 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 (...)
Package Pins Download
LQFN-CLIP (RVF) 40 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos