LMS3655NQEVM: 3.3V @ 5.5A, 3.5 ~ 36V in


The LMS3655NQEVM evaluation module (EVM) demonstrates the capabilities of the LMS3655-Q1 automotive integrated buck converter. For optimized EMI performance, the LMS3655-Q1 has Spread Spectrum built in and the EVM has an EMI filter on the back side that assists with noise reduction. The user can choose to bypass that EMI filter using VIN1/GND1 posts. The EVM operates from a 3.8V to 36V input (up to 42V transients) and provides a fixed 3.3V output at 5.5A continuous load.


  • High Efficiency with 400kHz and Auto Light Mode PFM/PWM or Forced PWM Mode operation

  • /RESET Power Good output with 3ms delay on timer

  • External Frequency Synchronisation Input

  • Low EMI

  • Fully Synchronous with integrated HS and LS FET


Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 296-48019-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 3.3 V
Current Out 5.5 A
Voltage In 3.5 ~ 36 V
Efficiency @ Conditions >95%, 6V in, 3.3V @ 0.02 ~ 2 A
>90%, 18V in, 3.3V @ 0.01 ~ 4 A
>90%, 12V in, 3.3V @ 0.003 ~ 4.5 A
>85%, 24V in, 3.3V @ 0.003 ~ 5.5 A
Voltage Out Range - Fixed
Features Current Limit (Adj. or Fixed)
Light Load Mode
Power Good Output
Shutdown, Enable, Standby
Soft Start
Spread Spectrum Modulation
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 400 kHz
Standby Current [Typical] 2 µA
Quiescent Current [Typical] 7.5 µA
Component Count + Extras 29 + 23
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Automotive
Standby Current [Maximum] 3 µA
Quiescent Current [Maximum] 16 µA
Main I.C. Base Part LMS3655
Date Created By Author 2017-07
Date Added To Library 2021-06

Eval Board

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