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TPS544B28

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4-V to 16-V input, 20-A, PMBus, synchronous step-down converter

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Data sheet

TPS544B28

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Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 16 Vin (min) (V) 4 Vout (max) (V) 5.5 Vout (min) (V) 0.4 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Light load efficiency, PMBUS, Power good, Soft Start Adjustable, Synchronous Rectification, Telemetry Control mode D-CAP4 Operating temperature range (°C) to Iq (typ) (A) 4 Duty cycle (max) (%) 90
Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 16 Vin (min) (V) 4 Vout (max) (V) 5.5 Vout (min) (V) 0.4 Features Adaptive/Dynamic Voltage Scaling, Adjustable current limit, Differential Remote Sense, Enable, Forced PWM, Light load efficiency, PMBUS, Power good, Soft Start Adjustable, Synchronous Rectification, Telemetry Control mode D-CAP4 Operating temperature range (°C) to Iq (typ) (A) 4 Duty cycle (max) (%) 90
WQFN-HR (VAN) 19 9 mm² 3 x 3
  • 4V to 16V input voltage range without external bias
  • 2.7V to 16V input voltage range with external bias
  • 3.1V to 4.3V external VCC bias support
  • 8.4mΩ and 3.3mΩ MOSFETs (VVCC = 3.3V)
  • 20A continuous output current
  • Optimized 19-pin WQFN-HR package for efficiency and thermal performance
  • ±1.25% output voltage accuracy with internal feedback, TJ = –40°C to +150°C
  • 0.4V to 5.5V output voltage range
  • Differential remote sense
  • D-CAP4 with ultra-fast load-step response
  • User programmable NVM
  • Supports all ceramic output capacitors
  • Selectable auto-skip Eco-mode for high light-load efficiency
  • Programmable valley current limit
  • 500kHz, 600kHz, 800kHz, 1.0MHz, 1.2MHz, 1.4MHz selectable switching frequency
  • Programmable soft-start time
  • Prebiased start-up capability
  • Open-drain power-good output
  • Overvoltage and undervoltage fault protection
  • 3mm × 3mm (0.4mm pin pitch) and 3mm × 3.5mm (0.5 pin pitch) 19-pin QFN packages
  • Pin-to-pin compatible with 12A TPS544A28 and 6A TPS544628
  • 4V to 16V input voltage range without external bias
  • 2.7V to 16V input voltage range with external bias
  • 3.1V to 4.3V external VCC bias support
  • 8.4mΩ and 3.3mΩ MOSFETs (VVCC = 3.3V)
  • 20A continuous output current
  • Optimized 19-pin WQFN-HR package for efficiency and thermal performance
  • ±1.25% output voltage accuracy with internal feedback, TJ = –40°C to +150°C
  • 0.4V to 5.5V output voltage range
  • Differential remote sense
  • D-CAP4 with ultra-fast load-step response
  • User programmable NVM
  • Supports all ceramic output capacitors
  • Selectable auto-skip Eco-mode for high light-load efficiency
  • Programmable valley current limit
  • 500kHz, 600kHz, 800kHz, 1.0MHz, 1.2MHz, 1.4MHz selectable switching frequency
  • Programmable soft-start time
  • Prebiased start-up capability
  • Open-drain power-good output
  • Overvoltage and undervoltage fault protection
  • 3mm × 3mm (0.4mm pin pitch) and 3mm × 3.5mm (0.5 pin pitch) 19-pin QFN packages
  • Pin-to-pin compatible with 12A TPS544A28 and 6A TPS544628

The TPS544B28 device is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP4 control mode. The control method provides low minimum on-time and fast load-transient response across the entire output voltage range without requiring an external compensation network.

The TPS544B28 device has differential remote sense, high-performance integrated MOSFETs, and supports ±1.25% output voltage accuracy with internal reference. The device features accurate load and line regulation and Eco-mode or Forced Continuous Conduction Mode (FCCM) operation.

The PMBus interface with 1MHz clock support gives a convenient, standardized digital interface for device configuration as well as output voltage, output current, and die temperature telemetry. Pin strap options allow for the configuration of the overcurrent limit, fault response, internal or external feedback, output voltage selection, switching frequency, and compensation. Internal NVM is also available to store a variety of the PMBus parameters.

The TPS544B28 device is a lead-free device. The device is RoHS compliant without exemption.

The TPS544B28 device is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP4 control mode. The control method provides low minimum on-time and fast load-transient response across the entire output voltage range without requiring an external compensation network.

The TPS544B28 device has differential remote sense, high-performance integrated MOSFETs, and supports ±1.25% output voltage accuracy with internal reference. The device features accurate load and line regulation and Eco-mode or Forced Continuous Conduction Mode (FCCM) operation.

The PMBus interface with 1MHz clock support gives a convenient, standardized digital interface for device configuration as well as output voltage, output current, and die temperature telemetry. Pin strap options allow for the configuration of the overcurrent limit, fault response, internal or external feedback, output voltage selection, switching frequency, and compensation. Internal NVM is also available to store a variety of the PMBus parameters.

The TPS544B28 device is a lead-free device. The device is RoHS compliant without exemption.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS544B28 4V to 16V Input, 20A , Remote Sense Synchronous Buck Converter With PMBus® datasheet PDF | HTML 30 Jan 2026
EVM User's guide TPS544B28RBH Step-Down Converter Evaluation Module PDF | HTML 16 Jun 2025
EVM User's guide TPS544B28VAN Step-Down Converter Evaluation Module PDF | HTML 11 Jun 2025
Certificate TPS544B28EVM Declaration of Conformity (DoC) (Rev. A) 24 Jan 2025
Certificate TPS544B28RBHEVM EU Declaration of Conformity (DoC) (Rev. A) 24 Jan 2025

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WQFN-HR (VAN) 19 Ultra Librarian
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