This LM25576 reference design is based on a LM25576 demonstration board which was a assembled and tested platform to evaluate the LM25576 SIMPLE SWITCHER® stepdown converter. The reference design takes a 6V-42V input and generates a regulated 5V output that can source up to 3A of current.
The primary consideration for this design was to obtain the highest efficiency LM25576 design, over it’s full operating voltage input range.
Cost and size of components were a secondary consideration (i.e.: using small, less expensive ceramic capacitors; a small, off the shelf inductor; etc.). The result is a design that achieves 95% peak efficiency, with a short list of necessary components.
All optional features of the LM25576 can be enabled if necessary. The board layout is ideal for demonstrating the capabilities of the target design, while allowing for easy probing and adjustments.
| Manufacturer | Texas Instruments |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | DC/DC SMPS - Single Output |
| Eval Board |
Board not Stocked
|
| Topology |
Step Down
|
| Outputs and Type |
1 Non-Isolated
|
| Voltage Out: Factory Set |
5 V
|
| Current Out |
3 A
|
| Voltage In |
6 ~ 42 V
|
| Efficiency @ Conditions |
>90%, 7V in, 5V @ 500 mA ~ 2 A
>85%, 12V in, 5V @ 0.5 ~ 2.5 A >82%, 24V in, 5V @ 500 mA ~ 3 A >78%, 42V in, 5V @ 750 mA ~ 3 A |
| Voltage Out Range |
1.225 ~ Vin
|
| Features |
Current Limit (Adj. or Fixed)
Short Circuit Protection Shutdown, Enable, Standby Soft Start Synchronizable Thermal Protection |
| Switching Frequency |
300 kHz
|
| Standby Current [Typical] |
48 µA
|
| Quiescent Current [Typical] |
48 µA
|
| Component Count + Extras |
16 + 1
|
| Internal Switch |
Yes
|
| Design Author |
Texas Instruments
|
| Application / Target Market |
Automotive
White Goods |
| Standby Current [Maximum] |
70 µA
|
| Quiescent Current [Maximum] |
70 µA
|
| Main I.C. Base Part |
LM25576
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
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