4.5-V to 18-V, 20-A synchronous SWIFT™ buck converter with PMBus and frequency sync


Product details


Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.5 Vout (Max) (V) 5.5 Iout (Max) (A) 20 Iq (Typ) (uA) 9500 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 1000 Features Adjustable Current Limit, Enable, Frequency Synchronization, I2C/PMBus, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable, Voltage Margining, Differential Remote Sense, Over Current Protection, Adjustable Current Limit, Forced PWM, Soft Start Adjustable Operating temperature range (C) -40 to 125 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)


  • PMBus 1.2 Compliant Converters: 20 A and 30 A
  • Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.5 V to 5.5 V
  • 5 mm × 7 mm LQFN Package
  • Single Thermal Pad
  • Integrated 5.5-mΩ and 2.0-mΩ Stacked NexFET™ Power Stage
  • 500-mV to 1500-mV Reference for Adapative Voltage Scaling (AVS) and Margining through PMBus
  • 0.5% Reference Accuracy at 600 mV and Above
  • Lossless Low-Side MOSFET Current Sensing
  • Voltage Mode Control with Input Feed-Forward
  • Differential Remote Sensing
  • Monotonic Start-Up into Pre-Biased Output
  • Output Voltage and Output Current Reporting
  • External Temperature Monitoring with 2N3904 Transistor
  • Programmable via the PMBus interface
    • VOUT_COMMAND and AVS VOUT Transition Rate
    • Overcurrent Protection with Thermal Compensation
    • UVLO, Soft-Start and Soft-Stop
    • PGOOD, OV, UV, OT Levels
    • Fault Responses
    • Turn-On and Turn-Off Delays
  • Thermal Shutdown
  • Pin Strapping for Switching Frequency: 200 kHz to 1 MHz
  • Frequency Synchronization to an External Clock
  • Footprint Compatible 20-A, 30-A Converters

All trademarks are the property of their respective owners.

open-in-new Find other Buck converters (integrated switch)


The TPS544x25 devices are PMBus 1.2 Compliant, non-isolated DC-DC converters with integrated FETs, capable of high-frequency operation and 20-A or 30-A current output from a 5 mm × 7 mm package. High-frequency, low-loss switching, provided by an integrated NexFET™ power stage and optimized drivers, allows for very high-density power solutions. The PMBus interface enables the AVS through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current and an optional external temperature. Response to fault conditions can be set to either restart, latch-off or ignore depending on system requirements.

open-in-new Find other Buck converters (integrated switch)
Similar products you might be interested in
open-in-new Compare products
Same functionality with different pin-out to the compared device.
NEW TPS546B24A ACTIVE 2.95-V to 18-V, stackable 20-A synchronous SWIFT™ buck converter with pin-strapping and PMBus Upgraded 20-A PMBus converter product offering higher efficiency.
Similar functionality to the compared device.
TPS544C25 ACTIVE 4.5-V to 18-V, 30-A synchronous SWIFT™ buck converter with PMBus and frequency sync A pin-compatible product with higher current.

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 8
Type Title Date
* Data sheet TPS544x25 4.5-V to 18-V, 20-A and 30-A SWIFT Synchronous Buck Converters with PMBus and Frequency Synchronization datasheet May 15, 2015
Application note Programming the NVM of PMBus Buck Converters to Support Mass-Production Needs (Rev. B) May 13, 2019
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Maximizing power density and thermal performance in power-module designs Dec. 12, 2018
Application note Analysis and Design of Input Filter for DC-DC Circuit Nov. 27, 2017
Application note SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC Feb. 22, 2016
User guide Using the TPS544B25 and TPS544C25 (Rev. A) Sep. 16, 2015
Technical article Select the correct PMBus POL solution for your application Aug. 03, 2015

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 TPS544B25EVM-681 evaluation module (EVM) is designed as a single output DC-DC converter that demonstrates a typical low-voltage application while providing a number of test points to evaluate the performance. It uses a nominal 12-V input bus to produce a regulated 0.95-V output at up to (...)

  • Regulated 0.95-V output up to 30-ADC, steady-state output current
  • Configuarable features via the PMBus interface include Output Voltage, UVLO, Soft Start, Enable, Fault Limits and Programmable Response
  • Convenient Test Points for Probing Critical Waveforms
  • Optional External Temperature Sensor


Software development

Linux Driver for PMBUS
PMBUSSW-LINUX The Linux driver supports PMBus controlled Buck Controllers. The Linux driver supports communication through the PMBus and interfaces with the HWMon framework.


Linux Mainline Status

Available in Linux Main line: Yes
Available through N/A

Supported Devices:

  • tps40400
  • tps40422
  • tps544b20
  • tps544b25
  • (...)

Design tools & simulation

SLUM463.ZIP (110 KB) - PSpice Model
SLUM468.ZIP (159 KB) - PSpice Model
SLUM644A.TSC (104 KB) - TINA-TI Reference Design
SLUM646.ZIP (11 KB) - TINA-TI Spice 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
  • (...)

CAD/CAE symbols

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

Ordering & quality

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

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. ​​​​​​​​​​​​​​