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


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 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

LQFN-CLIP (RVF) 40 35 mm² 7 x 5 open-in-new Find other Buck converters (integrated switch)


  • 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

All trademarks are the property of their respective owners.

open-in-new Find other Buck converters (integrated switch)


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.

open-in-new Find other Buck converters (integrated switch)
Similar products you might be interested in
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS543C20 ACTIVE 4-V to 14-V, 40-A synchronous SWIFT™ buck converter with adaptive internal compensation A pin-compatible product with higher current.

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 16
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) Mar. 28, 2018
Application note DC/DC Converter Solutions for Hardware Accelerators in Data Center Applications (Rev. A) May 04, 2021
Application note Non-Isolated Point-of-Load Solutions for Tiger Lake in PC Applications (Rev. B) Apr. 29, 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Technical article 3 big benefits of small cells May 26, 2020
Application note Point-of-Load Solutions for Data Center App Implementing VR13.HC Vccin Spec (Rev. A) Jan. 08, 2020
White paper Small Cells, Big Impact: Designing Power Soutions for 5G Applications Jun. 26, 2019
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 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. 07, 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? Apr. 04, 2018
Technical article Powering FPGAs – Improving overshoot of voltage regulators for Intel Arria 10 and Stratix 10 FPGAs Feb. 08, 2018
Application note Understanding thermal-resistance specification of DC/DC convert. w/ MOSFETs Jan. 04, 2018
Selection guide Control-Mode Quick Reference Guide (Rev. A) Sep. 14, 2017
User guide TPS543B20 25-A Single Phase Synchronous Step-Down Converter May 22, 2017

Design & development

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

Hardware development

document-generic User guide

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 of 8T8R + 2FB RF-sampling AFE80xx family of transceiver solutions, such as AFE8092
  • JESD204B/C data interface to simplify digital interface; compliant up to 32.5-Gbps lane rates
  • Supports JESD204B/C for synchronization and compatibility
  • Includes efficient power-management solution
  • Onboard (...)
document-generic User guide

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 (...)

  • Internally compensated advanced current mode control minimizes external component count while maintaining true fixed frequency operation
  • Pin-strap selectable switching frequency with optional frequency synchronization
  • 4.1-mΩ / 1.9-mΩ integrated MOSFETs for high efficiency up to 25 A

Design tools & simulation

SLUM590.ZIP (128 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
LQFN-CLIP (RVF) 40 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​