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.
| 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 |
Singapore
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