2.95-V to 18-V input, stackable 10-A, SWIFT™ synchronous buck converter with pin-strapping/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) 10 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, Over Current Protection, I2C/PMBus, 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 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

LQFN-CLIP (RVF) 40 35 mm² 7 x 5 open-in-new Find other Buck converters (integrated switch)


  • 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×, 3x, 4× stackable with current sharing up to 40 A, supporting a single address per output
  • Selectable 0.6-V to 5.5-V output via pin strap or 0.25-V to 6.0-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

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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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Sample availability

Preproduction samples are available (XPS546A24ARVFR). Request now

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet TPS546A24A 2.95-V to 18-V, 10-A, up to 4× Stackable, PMBus Buck Converter datasheet Dec. 16, 2019
More literature TPS546A24AEVM-1PH EU Declaration of Conformity (DoC) Jul. 30, 2020
Technical articles 3 big benefits of small cells May 26, 2020
Application notes Minimize On-Time-Jitter and Ripple by Optimizing Compensation May 11, 2020
Technical articles Advantages of scalability: from Peter Parker to pin-strapping Apr. 30, 2020
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles SoC power design: 3 steps to a thermally optimized power supply Mar. 08, 2020
Application notes Powering the TPS546D24A Device Family From a Single 3.3-V Input Power Supply (Rev. A) Mar. 04, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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

Hardware development

document-generic User guide
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 PMBus (...)
  • 2 stacked devices with current sharing
  • Selectable internal compensation
  • PMBus programmable switching frequency from 225 kHz to 1.5 MHz
  • PMBus telemetry of VIN, VOUT, IOUT, and internal die temperature
  • Adaptive voltage scaling (AVS) and margining via PMB
  • Differential remote sense with internal FB divider (...)

Design tools & simulation

SLUM710.ZIP (98 KB) - IBIS Model
SLUM714.ZIP (257 KB) - PSpice Model
SLUM748.ZIP (1865 KB) - SIMPLIS Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLUC686A.ZIP (165 KB)

CAD/CAE symbols

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