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Regulated DC Step-up Convertor with variable output voltage.

R

royalmp2001

Jan 1, 1970
0
Correct me but I don't think such a thing exists as a chip.

I want to use a 9v battery to get a variable 9-14V regulated output,
but sticking a regulator on the end of a chip step-up convertor doesn't
seem too efficient.

Anyone know of a chip that will do the whole job that requires just
connecting up a pot to control the output voltage? I don't need much
current, say 20mA.
Thanks
 
E

ehsjr

Jan 1, 1970
0
royalmp2001 said:
Correct me but I don't think such a thing exists as a chip.

I want to use a 9v battery to get a variable 9-14V regulated output,
but sticking a regulator on the end of a chip step-up convertor doesn't
seem too efficient.

Anyone know of a chip that will do the whole job that requires just
connecting up a pot to control the output voltage? I don't need much
current, say 20mA.
Thanks

Check out the TL499. When used as a step up
DC-DC converter, the regulation is in the switcher.

You do need to add a pot, a couple of resistors and
caps, and an inductor.

Ed
 
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