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TPS546C23

ACTIVE

4.5-V to 18-V, stackable 35-A synchronous SWIFT™ buck converter with PMBus and telemetry

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Data sheet

TPS546C23

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 35 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, Over Current Protection, PMBus, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Telemetry, UVLO adjustable, Voltage Margining Control mode Voltage mode Vout (min) (V) 0.35 Vout (max) (V) 5.5 Iq (typ) (µA) 7700 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 35 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, Over Current Protection, PMBus, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Telemetry, UVLO adjustable, Voltage Margining Control mode Voltage mode Vout (min) (V) 0.35 Vout (max) (V) 5.5 Iq (typ) (µA) 7700 Duty cycle (max) (%) 100
LQFN-CLIP (RVF) 40 35 mm² 7 x 5
  • PMBus™ 1.3 Compliant Converters: 35 A
  • 2-Device Stackable for up to 70 A With Current Sharing
  • Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.35 V to 5.5 V
  • Integrated 3.2-mΩ and 1.4-mΩ Stacked NexFET™ Power Stage
  • 350-mV to 1650-mV Reference for Adaptive Voltage Scaling (AVS) Function 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
  • Internal Die Temperature Monitoring
  • 64 Programmable PMBus Addresses via ADDR0 and ADDR1 Pins
  • Programmable via the PMBus Interface:
    • OCP, UVLO, Soft-Start, PG, OV, UV, OT Levels, Fault Responses
    • Turnon and Turnoff Delays
  • Thermal Shutdown
  • Pin Strapping for Switching Frequency: 200 kHz to 1 MHz
  • Frequency Synchronization to an External Clock or Output Clock to Sync Out
  • Create a Custom Design Using the TPS546C23 With the WEBENCH® Power Designer
  • PMBus™ 1.3 Compliant Converters: 35 A
  • 2-Device Stackable for up to 70 A With Current Sharing
  • Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.35 V to 5.5 V
  • Integrated 3.2-mΩ and 1.4-mΩ Stacked NexFET™ Power Stage
  • 350-mV to 1650-mV Reference for Adaptive Voltage Scaling (AVS) Function 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
  • Internal Die Temperature Monitoring
  • 64 Programmable PMBus Addresses via ADDR0 and ADDR1 Pins
  • Programmable via the PMBus Interface:
    • OCP, UVLO, Soft-Start, PG, OV, UV, OT Levels, Fault Responses
    • Turnon and Turnoff Delays
  • Thermal Shutdown
  • Pin Strapping for Switching Frequency: 200 kHz to 1 MHz
  • Frequency Synchronization to an External Clock or Output Clock to Sync Out
  • Create a Custom Design Using the TPS546C23 With the WEBENCH® Power Designer

The TPS546C23 devices are PMBus 1.3 Compliant, non-isolated DC/DC converters with integrated FETs, capable of high-frequency operation and 35-A current output from a 7-mm × 5-mm package. Two TPS546C23 devices can be paralleled together to provide up to 70-A load. Current sensing is realized by sampling a small portion of the power stage current and independent on the device temperature. 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 functions through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current, and internal die temperature. Response to fault conditions can be set to either restart, latch-off or ignore depending on system requirements.

The TPS546C23 devices are PMBus 1.3 Compliant, non-isolated DC/DC converters with integrated FETs, capable of high-frequency operation and 35-A current output from a 7-mm × 5-mm package. Two TPS546C23 devices can be paralleled together to provide up to 70-A load. Current sensing is realized by sampling a small portion of the power stage current and independent on the device temperature. 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 functions through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current, and internal die 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 TPS546C23 4.5-V to 18-V, 35-A 2× Stackable Synchronous Buck Converters With PMBus Supporting Telemetry datasheet (Rev. C) PDF | HTML 11 Jun 2018
User guide TPS546C23 2-Phase SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 24 Feb 2022
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article 3 big benefits of small cells PDF | HTML 26 May 2020
White paper Small Cells, Big Impact: Designing Power Soutions for 5G Applications 26 Jun 2019
Application note Programming the NVM of PMBus Buck Converters to Support Mass-Production Needs (Rev. B) 13 May 2019
Application note 如何实现比基准更低的输出电压 08 Apr 2018
Application note Analysis and Design of Input Filter for DC-DC Circuit 27 Nov 2017
Technical article Getting started with PMBus PDF | HTML 14 Sep 2017
Technical article Save PCB space and overcome point-of-load design complexity with PMBus modules PDF | HTML 27 Mar 2017
Technical article Stack current with PowerStack packages for higher power POL PDF | HTML 07 Dec 2016
More literature TPS546C23 Quick Reference Guide 17 Nov 2016
EVM User's guide TPS546C23EVM1-746 Two, Separated Single-Phase Evaluation Module 21 Jun 2016
Application note Method of Graphing Safe Operating Area (SOA) Curves in DC-DC Converter 30 Mar 2016
Analog Design Journal MOSFET power losses and how they affect power-supply efficiency 26 Jan 2016

Design & development

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

Evaluation board

TPS546C23EVM1-746 — TPS546C23 35A PMBus Stackable Synchronous Buck Converter Evaluation Module

The TPS546C23EVM1-746 evaluation module provides two separate buck converters that convert from a nominal 12-V bus to produce two regulated 0.9-V outputs, up to 35 A of load current each. The TPS546C23EVM1-746 is designed to demonstrate the TPS546C23 in a typical single-phase low output voltage (...)

User guide: PDF
Not available on TI.com
Evaluation board

TPS546C23EVM2-746 — TPS546C23 Stacked Two-Phase 70A Evaluation Module With PMBUS

The TPS546C23EVM2-746 evaluation module combines two 35-A TPS546C23 buck converters in a stackable configuration to deliver a continuous 70-A output current and a regulated 1.2-V output from a nominal 12-V input bus. The evaluation module accomodates the PMBus interface with telemetry.

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

TPS546C23 IBIS Model

SLUM706.ZIP (53 KB) - IBIS Model
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Simulation model

TPS546C23 PSpice Transient Model

SLUM531.ZIP (289 KB) - PSpice Model
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Calculation tool

SLURB05 — TPS546C20A and TPS546C23 Excel Calculator and Layout Checklist

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
TPS546C20A — 4.5-V to 18-V, stackable 35-A synchronous SWIFT™ buck converter with PMBus and pin-strapping TPS546C23 — 4.5-V to 18-V, stackable 35-A synchronous SWIFT™ buck converter with PMBus and telemetry
Download
Reference designs

PMP20490 — High-Density 12Vin, 1.2Vout, 60A POL Reference Design with Stacked TPS546C20A PMBus DCDC Converters

The TPS546C23 provides a single IC for both control & the synchronous power stage for high current DC/DC applications and allows doubling of the current capability with use of two of the same part.  Multi-phase also allows output ripple cancellation and effective higher bandwidth control (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
LQFN-CLIP (RVF) 40 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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