TPS54328EVM-686: 1.05V @ 3A, 4.5 ~ 18V in


The TPS54328 is a single, adaptive on-time, D-CAP2™-mode, synchronous buck converter requiring a very low external component count. The D-CAP2™ control circuit is optimized for low-ESR output capacitors such as POSCAP, SP-CAP, or ceramic types and features fast transient response with no external compensation. The switching frequency is internally set at a nominal 700 kHz.

The high-side and low-side switching MOSFETs are incorporated inside the TPS54328 package along with the gate drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS54328 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS54328 also features auto-skip Eco-mode™ for improved light load efficiency. The TPS54328 dc/dc synchronous converter is designed to provide up to a 3-A output from an input voltage source of 4.5 V to 18 V. The output voltage range is from 0.76 V to 7.0 V. Rated input voltage and output current range for the evaluation module are given in Table 1.

The TPS54328EVM-686 evaluation module is a single, synchronous buck converter providing 1.05 V at 3 A from 4.5-V to 18-V input. This user’s guide describes the TPS54328EVM-686 performance.


Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 296-28144-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 1.05 V
Current Out 3 A
Voltage In 4.5 ~ 18 V
Efficiency @ Conditions >80%, 5V in, 1.05V @ 0.04 ~ 2 A
>80%, 12V in, 1.05V @ 0.25 ~ 1.5 A
>75%, 5V in, 1.05V @ 0.02 ~ 3 A
>74%, 12V in, 1.05V @ 0.06 ~ 3 A
Voltage Out Range 0.76 ~ 7 V
Features Current Limit (Adj. or Fixed)
Over Current Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 675 kHz
Standby Current [Typical] 1.8 µA
Quiescent Current [Typical] 800 µA
Component Count + Extras 15 + 9
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Computers
DVD/Blu-ray Players
LCD TV / Monitor
Set-Top Boxes
Standby Current [Maximum] 10 µA
Quiescent Current [Maximum] 1.2 mA
Main I.C. Base Part TPS54328
Date Created By Author 2010-12
Date Added To Library 2020-05

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