LM25574EVAL: 5V @ 500mA; 7 ~ 42 V in, 82%

Summary

The LM25574 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM25574 regulator IC. The evaluation board provides a 5V output with a 0.5A 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 LM25574 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	296-52590-ND
Eval Board Supplier	Texas Instruments
Eval Board	Board not Stocked
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	5 V
Current Out	500 mA
Voltage In	7 ~ 42 V
Efficiency @ Conditions	>87%, 7V in, 5V @ 100 ~ 500 mA >82%, 24V in, 5V @ 200 ~ 500 mA
Voltage Out Range
Features	Over Current Protection
Switching Frequency	300 kHz
Standby Current [Typical]	48 µA
Quiescent Current [Typical]	3.7 mA
Component Count + Extras	14 + 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	LM25574
Date Created By Author
Date Added To Library	2011-03