Product details


Vin (Min) (V) 3 Vin (Max) (V) 28 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Iout (Max) (A) 40 Iq (Typ) (uA) 920 Switching frequency (Min) (kHz) 275 Switching frequency (Max) (kHz) 1000 Features Dynamic Voltage Scaling, Enable, Light Load Efficiency, PMBus, Power Good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

VQFN (RGT) 16 9 mm² 3 x 3 open-in-new Find other Buck controllers (external switch)


  • Conversion Input Voltage 3 V to 28 V
  • VDD input voltage 4.5 V to 28 V
  • Output voltage 0.6 V to 5.5 V
  • Supports all ceramic output capacitors
  • Reference voltage: 600 mV ±0.5% tolerance
  • ±9% Voltage adjustment with PMBus™
  • Built-in 5-V LDO
  • D-CAP2™ mode with 100-ns load-step response
  • Auto-skip Eco-mode™ for light-load efficiency
  • Adaptive on-time control architecture with eight selectable frequencies using PMBus
  • Supports voltage margining using PMBus
  • Programmable soft-start time using PMBus
  • Programmable power-on delay using PMBus
  • Programmable VDD UVLO level using PMBus
  • Fault report using PMBus
  • Pre-charged start-up capability
  • Built-In output discharge
  • Power-good output with programmable delay
  • Internal overvoltage, undervoltage, and overcurrent limit protections
  • Thermal shutdown (non-latch)
  • 3 mm × 3 mm, 16-pin, QFN package
  • Create a custom design using the TPS53819A with the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

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The TPS53819A device is a small-sized, single buck controller with adaptive on-time D-CAP2 mode control and PMBus. The device is suitable for low output voltage and high current, system power rail, or similar point-of-load (POL) power supply in digital consumer products. Small package with minimal pin-count saves space on the PCB, while the programmability and fault report via PMBus simplify the power supply design. The skip-mode at light-load condition combined with strong gate drivers and low-side FET on-resistance (RDS(on)) current sensing can support low-loss and high efficiency operation, over a broad load range. The conversion input voltage, which is the high-side FET drain voltage, ranges from 3 V to 28 V. The supply voltage (VDD) is from 4.5 V to 28 V. The output voltage ranges from 0.6 V to 5.5 V. The device is available in a 16-pin, QFN package and is specified from –40°C to +85°C.

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Technical documentation

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Type Title Date
* Data sheet TPS53819A 3-V to 28-V Input, 40-A, Eco-Mode™, D-CAP2™ Synchronous Buck Controller With PMBus™ datasheet (Rev. B) Apr. 05, 2019
Application note Programming the TPS53819A 3-V to 28-V Input, 40-A, Eco-mode™, D-CAP2™ May 05, 2020
White paper Power solution options for data center applications (Rev. A) Feb. 27, 2020
Technical article Select the correct PMBus POL solution for your application Aug. 03, 2015
User guide Using the TPS53819AEVM-123 Step-Down Controller Evaluation Module (Rev. A) Dec. 06, 2012

Design & development

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

Hardware development

TPS53819A Evaluation Module
document-generic User guide
The Texas Instruments TPS53819AEVM-123 evaluation module (EVM) helps designers evaluate the performance of the TPS53819A High Performance, Single Synchronous Step-Down Controller with PMBus. If a designer wants to communicate with this EVM from a Windows-based PC, a separate USB Interface Adapter (...)
  • Conversion Input Voltage Range: 3 V to 28 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • DCAP2 Mode with 100-ns Load Step Response
  • Adaptive On-Time Control with Eight Selectable Frequencies via PMBus
  • Programmable Soft-Start Time, Power-On Delay, VDD UVLO Level, Power Good Output Delay via PMBus
  • Internal (...)

Design tools & simulation

SLUM349A.ZIP (40 KB) - PSpice Model
SLUM545.ZIP (76 KB) - TINA-TI Spice Model
SLUM546.TSC (867 KB) - TINA-TI Reference Design
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
  • (...)

Reference designs

TPS53819A Synchronous Step-Down Regulator with PMBus for Industrial Bus POL Applications
PMP11220 The PMP11220 reference design is a high efficiency, high power density, PMBus synchronous buck converter design for programming, and margining the power supply including output voltage.  With a nominal input of 24V meant for industrial bus applications, this design allows for programmable (...)
document-generic Schematic document-generic User guide
20A Communication/ Enterprise Storage ASIC Adaptive Voltage Scaling Power Supply PMBus Ref. Design
PMP10778 This is a 20A Communication or Enterprise Storage ASIC Adaptive Voltage Scaling (AVS) power supply using the TPS53819A PMBus PWM controller. The design enables high power density, PCB layout flexibility and ease of test and design for AVS using the PMBus interface and the Vout Adjustment and (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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VQFN (RGT) 16 View options

Ordering & quality

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