Maker Pro
Maker Pro

Low Q current linear regulators

P

Pimpom

Jan 1, 1970
0
Standard 78xx regulators are very handy, but their quiescent
current of 5mA or more seems wasteful when the load is only a few
mAs. 78Lxx types are no better in this respect. What would you
recommend as stock low-quiescent devices? They need not be real
micro-power, ~1mA standby current is OK. LDO and TH desireable
but not essential. One prime requirement is that they should be
available just about everywhere, which is why I have not simply
searched through manufacturers' datasheets. And reasonably priced
of course. TIA.
 
E

E

Jan 1, 1970
0
Pimpom said:
Standard 78xx regulators are very handy, but their quiescent current of
5mA or more seems wasteful when the load is only a few mAs. 78Lxx types
are no better in this respect. What would you recommend as stock
low-quiescent devices? They need not be real micro-power, ~1mA standby
current is OK. LDO and TH desireable but not essential. One prime
requirement is that they should be available just about everywhere, which
is why I have not simply searched through manufacturers' datasheets. And
reasonably priced of course. TIA.
I like lp2950/lp2951. Low dropout, low quiescent current and low price
 
H

Hammy

Jan 1, 1970
0
Standard 78xx regulators are very handy, but their quiescent
current of 5mA or more seems wasteful when the load is only a few
mAs. 78Lxx types are no better in this respect. What would you
recommend as stock low-quiescent devices? They need not be real
micro-power, ~1mA standby current is OK. LDO and TH desireable
but not essential. One prime requirement is that they should be
available just about everywhere, which is why I have not simply
searched through manufacturers' datasheets. And reasonably priced
of course. TIA.

You are looking for either a CMOS LDO or one with a super beta PNP.
Heres a cheap Onsemi CMOS one.

http://www.onsemi.com/pub_link/Collateral/NCP511-D.PDF

Check out Mcrochips offerings most of theirs are CMOS. Heres two I
have.

http://ww1.microchip.com/downloads/en/DeviceDoc/22008E.pdf

http://ww1.microchip.com/downloads/en/DeviceDoc/22070a.pdf
 
P

Pimpom

Jan 1, 1970
0
Pimpom said:
Standard 78xx regulators are very handy, but their quiescent
current of 5mA or more seems wasteful when the load is only a
few
mAs. 78Lxx types are no better in this respect. What would you
recommend as stock low-quiescent devices? They need not be real
micro-power, ~1mA standby current is OK. LDO and TH desireable
but not essential. One prime requirement is that they should be
available just about everywhere, which is why I have not simply
searched through manufacturers' datasheets. And reasonably
priced
of course. TIA.

Thanks for the replies and sorry about the late reply - I'm
swamped with work these days. I'll see if I can get the types you
suggested: This is always a major factor for me, and is the
reason why I have not simply picked them out from the specs.
 
Top