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TPS543C20A

ACTIVE

4-V to 16-V, 40-A synchronous SWIFT™ buck converter with adaptive internal compensation

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Data sheet

TPS543C20A

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 40 Vin (min) (V) 4 Vin (max) (V) 16 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2000 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 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 4300 Duty cycle (max) (%) 70
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 40 Vin (min) (V) 4 Vin (max) (V) 16 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2000 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 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 4300 Duty cycle (max) (%) 70
LQFN-CLIP (RVF) 40 35 mm² 7 x 5
  • Internally-Compensated Advanced Current Mode Control 40-A POL
  • Input Voltage Range: 4 V to 16 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Integrated 3.4/0.9-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 80 A With Current Share, Voltage Share, and CLK Sync
  • Pin Strapping Programmable Reference from 0.6V 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 TPS543C20A With the WEBENCH® Power Designer
  • Internally-Compensated Advanced Current Mode Control 40-A POL
  • Input Voltage Range: 4 V to 16 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Integrated 3.4/0.9-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 80 A With Current Share, Voltage Share, and CLK Sync
  • Pin Strapping Programmable Reference from 0.6V 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 TPS543C20A With the WEBENCH® Power Designer

The TPS543C20A uses 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 40 A in a 5-mm × 7-mm PowerStack™ package with a layout friendly thermal pad. Two TPS543C20A devices can be stacked together to provide up to 80-A point-of-load.

The TPS543C20A uses 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 40 A in a 5-mm × 7-mm PowerStack™ package with a layout friendly thermal pad. Two TPS543C20A devices can be stacked together to provide up to 80-A point-of-load.
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Technical documentation

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Type Title Date
* Data sheet TPS543C20A 4-VIN to 16-VIN, 40-A Stackable, Synchronous Step-Down SWIFT™ Converter With Adaptive Internal Compensation datasheet PDF | HTML 01 Dec 2018
Analog Design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML 29 Aug 2023
User guide TPS543C20A SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 28 Sep 2021
Application note Point-of-Load Solutions for Network Interface Cards (NIC) PDF | HTML 08 Sep 2021
Application note DC/DC Converter Solutions for Hardware Accelerators in Data Center Applications (Rev. A) PDF | HTML 04 May 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Application note Point-of-Load Solutions for Data Center App Implementing VR13.HC Vccin Spec (Rev. A) PDF | HTML 08 Jan 2020
White paper Internally compensated advanced current mode (ACM) (Rev. A) 07 Dec 2018
Analog Design Journal Comparing internally-compensated advanced current mode (ACM) w/ D-CAP3™ control (Rev. A) 06 Nov 2018
Application note Solve Point-of-Load Power Design Challenges: Single Board Computer Applications 24 Aug 2018
Analog Design Journal Understanding thermal-resistance specification of DC/DC convert. w/ MOSFETs 04 Jan 2018

Design & development

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

Evaluation board

TPS543C20AEVM-054 — 40-A fixed frequency non-compensation stackable synchronous buck converters evaluation module

The TPS543C20AEVM-054 evaluation module provides a fixed 0.9-V output at up to 40 A from a nominal 12-V input bus. The design acheives 90% peak efficiency.

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

TPS543C20A PSpice Transient Model

SLUM671.ZIP (128 KB) - PSpice Model
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Calculation tool

SLURB00 — TPS543B20 TPS543C20A TPS543C20 Excel Calculator Tool and Checklist

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
TPS543B20 — 4-V to 19-V, 25-A synchronous SWIFT™ buck converter with adaptive internal compensation TPS543C20 — 4-V to 14-V, 40-A synchronous SWIFT™ buck converter with adaptive internal compensation TPS543C20A — 4-V to 16-V, 40-A synchronous SWIFT™ buck converter with adaptive internal compensation
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Reference designs

PMP21386 — Dual Phase Stackable Buck Converter Reference Design with Full Test Capability

This reference design uses TPS543C20 in a stacked configuration to provide 0.85V @ 40A in a compact (21mm x 35mm) form factor with low temperature rise with no airflow. Board includes on board high speed dynamic load tester, output ripple probe interface, and test point for stability analyzer, (...)
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.

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