Need tiny switcher 3.3v in 2.5vout 300ma

[Yzordderrex]

Title says it all. Application is cell phone and I need more
efficiency. I'm using a LDO now. I can use TI, Maxim,LT, national,
Micrel. Boss wants answer NOW!

regards,
Bob
N9NEO

 

[Martin Riddle]

Title says it all. Application is cell phone and I need more
efficiency. I'm using a LDO now. I can use TI, Maxim,LT, national,
Micrel. Boss wants answer NOW!

regards,
Bob
N9NEO

Linear Tech has some neat sot switchers.

Cheers

 

[David L. Jones]

Title says it all. Application is cell phone and I need more
efficiency. I'm using a LDO now. I can use TI, Maxim,LT, national,
Micrel. Boss wants answer NOW!

regards,
Bob
N9NEO

Plenty of options available there.
How about the MAX8640:
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5281

Tiny SC-70 package, available with 2.5V preset out (saving you parts), and
around 87% efficiency @ 300mA.
I haven't checked availability.

Dave.

 

[David L. Jones]

Plenty of options available there.
How about the MAX8640:
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5281

Tiny SC-70 package, available with 2.5V preset out (saving you parts), and
around 87% efficiency @ 300mA.
I haven't checked availability.

The Micrel MIC2205 will hit 90% @ 300mA:
http://www.micrel.com/page.do?page=/product-info/products/mic2205.shtml
How much board space do you have?
Cost an issue?
Got an efficiency target in mind?
Is the load a fairly constant 300mA?, or does it vary a lot?

Dave.

 

[[email protected]]

Title says it all. Application is cell phone and I need more
efficiency. I'm using a LDO now. I can use TI, Maxim,LT, national,
Micrel. Boss wants answer NOW!

regards,
Bob
N9NEO

http://www.linear.com/pc/productDetail.jsp?navId=LTC3411

300mA 3.3V to 2.5V = ~96%

BTW your boss sounds like a right dick