Product details

Vin (Min) (V) 4 Vin (Max) (V) 19 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Iout (Max) (A) 25 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 2000 Features Enable, Frequency Synchronization, Over Current Protection, Phase Interleaving, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Fixed, Differential Remote Sense, Forced PWM, Soft Start Adjustable, Adjustable Current Limit Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4 Vin (Max) (V) 19 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Iout (Max) (A) 25 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 2000 Features Enable, Frequency Synchronization, Over Current Protection, Phase Interleaving, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Fixed, Differential Remote Sense, Forced PWM, Soft Start Adjustable, Adjustable Current Limit Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
LQFN-CLIP (RVF) 40 35 mm² 7 x 5
  • Internally-Compensated Advanced Current Mode Control 25-A POL
  • Input Voltage Range: 4 V to 19 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Integrated 4.1/1.9-mΩ Stacked NexFET™ Power Stage With Lossless Low-Side Current Sensing
  • Fixed Frequency - Synchronization to an External Clock and/or Sync Out
  • Pin Strapping Programmable Switching Frequency
    • 300 kHz to 2 MHz for Standalone
    • 300 kHz to 1 MHz for Stackable
  • Stack 2× for up to 50 A With Current Share, Voltage Share, and CLK Sync
  • Pin Strapping Programmable Reference from 0.6 V to 1.1 V With 0.5% Accuracy
  • Differential Remote Sensing
  • Safe Start-Up into Prebiased Output
  • High-Accuracy Hiccup Current Limit
  • Asynchronous Pulse Injection (API) and Body Braking
  • 40-pin, 5-mm × 7-mm LQFN Package with 0.5-mm Pitch and Single Thermal Pad
  • Create a Custom Design Using the TPS543B20 With the WEBENCH® Power Designer
  • Internally-Compensated Advanced Current Mode Control 25-A POL
  • Input Voltage Range: 4 V to 19 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Integrated 4.1/1.9-mΩ Stacked NexFET™ Power Stage With Lossless Low-Side Current Sensing
  • Fixed Frequency - Synchronization to an External Clock and/or Sync Out
  • Pin Strapping Programmable Switching Frequency
    • 300 kHz to 2 MHz for Standalone
    • 300 kHz to 1 MHz for Stackable
  • Stack 2× for up to 50 A With Current Share, Voltage Share, and CLK Sync
  • Pin Strapping Programmable Reference from 0.6 V to 1.1 V With 0.5% Accuracy
  • Differential Remote Sensing
  • Safe Start-Up into Prebiased Output
  • High-Accuracy Hiccup Current Limit
  • Asynchronous Pulse Injection (API) and Body Braking
  • 40-pin, 5-mm × 7-mm LQFN Package with 0.5-mm Pitch and Single Thermal Pad
  • Create a Custom Design Using the TPS543B20 With the WEBENCH® Power Designer

The TPS543B20 employs an internally compensated emulated peak-current-mode control, with a clock synchronizable, fixed-frequency modulator for EMI-sensitive POL. The internal integrator and directly amplifying ramp tracking loop eliminate the need for external compensation over a wide range of frequencies thereby making the system design flexible, dense, and simple. Optional API and body braking help improve transient performance by significantly reducing undershoot and overshoot, respectively. Integrated NexFET™ MOSFETs with low-loss switching facilitate high efficiency and deliver up to 25 A in a 5-mm × 7-mm PowerStack™ package with a layout friendly thermal pad. Two TPS543B20 devices can be stacked together to provide up to 50-A point-of-load.

The TPS543B20 employs an internally compensated emulated peak-current-mode control, with a clock synchronizable, fixed-frequency modulator for EMI-sensitive POL. The internal integrator and directly amplifying ramp tracking loop eliminate the need for external compensation over a wide range of frequencies thereby making the system design flexible, dense, and simple. Optional API and body braking help improve transient performance by significantly reducing undershoot and overshoot, respectively. Integrated NexFET™ MOSFETs with low-loss switching facilitate high efficiency and deliver up to 25 A in a 5-mm × 7-mm PowerStack™ package with a layout friendly thermal pad. Two TPS543B20 devices can be stacked together to provide up to 50-A point-of-load.

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Technical documentation

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Type Title Date
* Data sheet TPS543B20 4-VIN to 19-VIN, 25-A Stackable, Synchronous Step-Down SWIFT™ Converter With Adaptive Internal Compensation datasheet (Rev. B) 28 Mar 2018
Application note Point-of-Load Solutions for Network Interface Cards (NIC) 08 Sep 2021
Application note DC/DC Converter Solutions for Hardware Accelerators in Data Center Applications (Rev. A) 04 May 2021
Application note Non-Isolated Point-of-Load Solutions for Tiger Lake in PC Applications (Rev. B) 29 Apr 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article 3 big benefits of small cells 26 May 2020
Application note Point-of-Load Solutions for Data Center App Implementing VR13.HC Vccin Spec (Rev. A) 08 Jan 2020
White paper Small Cells, Big Impact: Designing Power Soutions for 5G Applications 26 Jun 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note DC/DC Point-of-load Power Solutions for Wired Networking Switch Systems 11 Dec 2018
White paper Internally compensated advanced current mode (ACM) (Rev. A) 07 Dec 2018
Application note Solve Point-of-Load Power Design Challenges: Single Board Computer Applications 24 Aug 2018
Technical article Why are there so many control modes for step-down DC/DC converters and controllers? 04 Apr 2018
Technical article Powering FPGAs – Improving overshoot of voltage regulators for Intel Arria 10 and Stratix 10 FPGAs 08 Feb 2018
Analog design journal Understanding thermal-resistance specification of DC/DC convert. w/ MOSFETs 04 Jan 2018
Selection guide Control-Mode Quick Reference Guide (Rev. A) 14 Sep 2017

Design & development

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

Evaluation board

AFE8092EVM — AFE8092 evaluation module for octal-channel RF transceiver

The AFE8092 evaluation module (EVM) is an RF-sampling transceiver platform that can be simultaneously configured to support up to eight-transmit eight-receive plus two-feedback (8T8R + 2FB) channels. AFE8092EVM evaluates the AFE8092, which belongs to a family of octal-channel, RF-sampling, analog (...)

Evaluation board

TPS543B20EVM-054 — 25-A Fixed Frequency Non-Compensation Stackable Syncronous Buck Converter Evaluation Module

The TPS543B20EVM-054 is designed to help the user easily evaluate and test the operation and functionality of the TPS543B20 buck converter. The EVM converts a 4-V to 19-V input voltage to a regulated 0.9-V output voltage that delivers up to 25 A in a 5-mm x 7-mm QFN package. The EVM features (...)

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Simulation model

TPS543B20 PSpice Transient Model

SLUM590.ZIP (128 KB) - PSpice Model
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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LQFN-CLIP (RVF) 40 View options

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