LM25575EVAL: 5V @ 1.5A; 7 ~ 42 V in, 85%

Summary

The LM25575 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM25575 regulator IC. The evaluation board provides a 5V output with a 1.5A current capability. The ultra-wide input voltage ranges from 7V to 42V.

The design operates at 300kHz, a good compromise between conversion efficiency and solution size. The printed circuit board consists of 2 layers of 2 ounce copper on FR4 material with a thickness of 0.06 inches. This application note contains the evaluation board schematic, Bill-of-Materials (BOM) and a quick setup procedure. Refer to the LM25575 datasheet for complete circuit design information.

Specifications

Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number LM25575EVAL-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 5 V
Current Out 1.5 A
Voltage In 7 ~ 42 V
Efficiency @ Conditions >90%, 7V in, 5V @ 250 mA ~ 1 A
>85%, 7V in, 5V @ 0.25~ 1.5 A
>80%, 24V in, 5V @ 300 mA ~ 1.5 A
Voltage Out Range 1.225 ~ 40 V
Features Over Current Protection
Switching Frequency 300 kHz
Standby Current [Typical] 48 µA
Quiescent Current [Typical] 3.7 mA
Component Count + Extras 18 + 5
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Point of Load (PoL)
Standby Current [Maximum] 70 µA
Quiescent Current [Maximum] 4.5 mA
Main I.C. Base Part LM25575
Date Created By Author
Date Added To Library 2011-03

Eval Board

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Support Documents & Media

AN-1149 - Layout Guidelines for SMPS LM25575 EVAL User Guide - App Note AN-1578 LM25575 - Datasheet LM(2)557x Downloadable Excel Calculator AN-1197 - Selecting Inductors for Buck DC/DC Ultra Librarian Software:CAD Symbols and Footprints (Zip File) TI's CAD/CAE Symbols and Footprint Search

Media

LM25575EVAL_Schematic.JPG LM25575EVAL_Photo.JPG LM25575EVAL_Chart.JPG