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TPS544C25

ACTIVE

4.5-V to 18-V, 30-A synchronous SWIFT™ buck converter with PMBus and frequency sync

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Data sheet

TPS544C25

ACTIVE
Data sheet Order now

Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.5 Vout (Max) (V) 5 Iout (Max) (A) 30 Iq (Typ) (uA) 7700 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 Rating Catalog Regulated outputs (#) 1 Control mode Voltage Mode Duty cycle (Max) (%) 80
Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.5 Vout (Max) (V) 5 Iout (Max) (A) 30 Iq (Typ) (uA) 7700 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 Rating Catalog Regulated outputs (#) 1 Control mode Voltage Mode Duty cycle (Max) (%) 80
LQFN-CLIP (RVF) 40 35 mm² 7 x 5
  • 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
  • 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

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.

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.
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Technical documentation

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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 PDF | HTML 15 May 2015
EVM User's guide TPS5442x5 Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 26 Aug 2021
Application note Programming the NVM of PMBus Buck Converters to Support Mass-Production Needs (Rev. B) 13 May 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Analog Design Journal Maximizing power density and thermal performance in power-module designs 12 Dec 2018
Application note Analysis and Design of Input Filter for DC-DC Circuit 27 Nov 2017
Application note SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC 22 Feb 2016
Analog Design Journal MOSFET power losses and how they affect power-supply efficiency 26 Jan 2016
Technical article Select the correct PMBus POL solution for your application 03 Aug 2015
Application note Not All Jitter Is Created Equal (Rev. A) 04 Jul 2015

Design & development

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

Evaluation board

TPS544C25EVM-681 — TPS544C25EVM-681 Evaluation Module

The TPS544C25EVM-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 (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS544C25 PSpice Average Model

SLUM462.ZIP (109 KB) - PSpice Model
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Simulation model

TPS544C25 PSpice Transient Model (Rev. A)

SLUM467A.ZIP (158 KB) - PSpice Model
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Calculation tool

TPS544B25 and TPS544C25 Excel Calculator and Layout Checklist

SLURB02.ZIP (1790 KB)
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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 (...)
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Reference designs

PMP12004-HE — Reference Design for Powering a Xilinx Zynq UltraScale+ Remote Radio Head (RRH) or Backhaul (BH)

This design for powering Xilinx Zynq UltraScale+ (www.xilinx.com/power) Remote Radio Heads (RRH) features the TPS6508640 and is a small and highly efficient solution. The PMIC reduces size, cost, and power loss by having integrated rails into 1 device, high switching frequency and separate rails (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP20023 — 12V to 1V 30A Voltage Mode Synchronous Buck Converter with PMBus Control Reference Design

Fixed frequency voltage mode control is used for communications and computing applications where a predictable frequency and / or synchronization to an external clock is needed. With control and power in one IC and inductor on top of the IC with its raised leads, a very small size solution is (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP11399 — PMBus Power System for Enterprise Ethernet Switches Reference Design

PMP11399 is a complete PMBus power system for 3 ASIC/FPGA cores, DDR3 core memory, VTT termination, and auxiliary voltages commonly found on high-performance Ethernet Switches. The hardware is accompanied by a GUI that allows the user to perform real-time configuration and monitoring of the power (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP11328 — 30A PMBus Reference Design for Xilinx Zynq Ultrascale+ ZU9EG MPSoC Core Rail for Base Stations

The PMP11328 is a high power density 30A PMBus power supply meeting the Xilinx Ultrascale+ ZU9EG FPGA core rail power specifications for Base Station Remote Radio Unit (RRU) applications. The power supply regulates 0.85V for the core rail at 25A in 55mm x 40mm total power supply PCB area. PMBus (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDEP0042 — Generating AVS SmartReflex Core Voltage for K2E Using TPS544C25 and PMBus Reference Design

The K2E requires the use of AVS SmartReflex control for the CVDD core voltage. This design provides method of generating the proper voltage using software and the PMBus interface of the TPS544C25. The circuit can be implemented on the XEVMK2EX.
Design guide: PDF
Schematic: PDF
Reference designs

TIDEP0041 — Generating AVS SmartReflex core voltage, PMBus for K2E reference design

The K2E requires the use of AVS SmartReflex control for the CVDD core voltage. This design provides method of generating the proper voltage without the need for any software. The circuit is currently implemented on the XEVMK2EX.
Design guide: PDF
Schematic: PDF
Reference designs

PMP10896 — Complete PMBus Power System for Enterprise Ethernet Switches Reference Design

Complete PMBus power system for 3 ASIC/FPGA cores, DDR3 core memory, and auxiliary voltages found on high-performance Ethernet Switches.
Test report: PDF
Schematic: PDF
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