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TPS543B20

ACTIVE

4-V to 19-V, 25-A synchronous SWIFT™ buck converter with adaptive internal compensation

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Data sheet

TPS543B20

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 25 Vin (max) (V) 19 Vin (min) (V) 4 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, Over Current Protection, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO Fixed Control mode ACM/AECM Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0043 Duty cycle (max) (%) 70
Rating Catalog Topology Buck Iout (max) (A) 25 Vin (max) (V) 19 Vin (min) (V) 4 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Frequency synchronization, Over Current Protection, Phase Interleaving, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO Fixed Control mode ACM/AECM Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0043 Duty cycle (max) (%) 70
LQFN-CLIP (RVF) 40 35 mm² (7 mm × 5 mm)
  • 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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* Data sheet TPS543B20 4-VIN to 19-VIN, 25-A Stackable, Synchronous Step-Down SWIFT™ Converter With Adaptive Internal Compensation datasheet (Rev. B) PDF | HTML Mar 28, 2018
Analog design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML Aug 29, 2023
Application note Point-of-Load Solutions for Network Interface Cards (NIC) PDF | HTML Sep 8, 2021
Application note DC/DC Converter Solutions for Hardware Accelerators in Data Center Applications (Rev. A) PDF | HTML May 4, 2021
Application note Non-Isolated Point-of-Load Solutions for Tiger Lake in PC Applications (Rev. B) PDF | HTML Apr 29, 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr 8, 2021
Technical article 3 big benefits of small cells PDF | HTML May 26, 2020
Application note Non-Isolated Point-of-Load Solutions for Elkhart Lake in Industrial PC App. (Rev. A) PDF | HTML May 21, 2020
Application note Point-of-Load Solutions for Data Center App Implementing VR13.HC Vccin Spec (Rev. A) PDF | HTML Jan 8, 2020
White paper Small Cells, Big Impact: Designing Power Soutions for 5G Applications Jun 26, 2019
Application note DC/DC Point-of-load Power Solutions for Wired Networking Switch Systems Dec 11, 2018
White paper Internally compensated advanced current mode (ACM) (Rev. A) Dec 7, 2018
Application note Solve Point-of-Load Power Design Challenges: Single Board Computer Applications Aug 24, 2018
Technical article Why are there so many control modes for step-down DC/DC converters and controllers PDF | HTML Apr 4, 2018
Technical article Powering FPGAs – Improving overshoot of voltage regulators for Intel Arria 10 and PDF | HTML Feb 8, 2018
Technical article Powering FPGAs – Improving undershoot of voltage regulators with asynchronous puls PDF | HTML Feb 2, 2018
Technical article Powering FPGAs - What to consider with Xilinx UltraScale+ FPGAs PDF | HTML Jan 29, 2018
Analog design Journal Understanding thermal-resistance specification of DC/DC convert. w/ MOSFETs Jan 4, 2018
Technical article Lightning-fast internally-compensated ACM topology – what can it do for you? PDF | HTML May 18, 2017

Design & development

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

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
Supported products & hardware
Calculation tool

SLURB00 — TPS543B20 TPS543C20A TPS543C20 Excel Calculator Tool and Checklist

Supported products & hardware
Reference design

PMP22194 — Synchronous inverting buck-boost converter with adjustable negative-output voltage reference design

This reference design uses a synchronous-buck regulator with internal top and bottom FETs which is configured as a synchronous-inverting buck-boost converter to provide an adjustable output between -0.2 V and -0.6 V capable of delivering a maximum 15 A of current to the load. The output voltage is (...)

Supported products & hardware
Reference design

TIPA-050005 — Non-isolated point-of-load solutions for Tiger Lake in PC applications

Advanced processors and platforms such as the Intel® Tiger Lake micro-architecture need point-of-load (POL) solutions for memory, low-power CPU rails, and 3.3V and 5V rail requirements from an array of rechargeable batteries, or a 12V input bus. 

 

This power-supply design highlights the latest (...)

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LQFN-CLIP (RVF) 40 Ultra Librarian
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