Which voltage regulator would be best for this?

I have a lot of inspection tools that use 1.55 volt button batteries.
If the voltage from the battery drops below 1.45 volts or so the
displays will start flashing. I use the silver oxide batteries, the
SR44 button ones. I only buy the name brand batteries because they
last the longest. I have tried on a couple tools using a 1.5 volt AA
battery but the damn scales are voltage sensitive so when the AA
battery voltage drops past the 1.45 volt limit, which happens pretty
fast, maybe 3 months, the display starts that flashing business. So I
was hoping that maybe a 3 . something volt battery and a voltage
regulator could be used to lengthen the battery change interval. For
the tools that can have a double A battery strapped on the back I
think the reg used wouldn't matter much. But most of the tools only
have room for a button battery so I would need a tiny efficient
voltage regulator. Is there such a beast?
Thanks,
Eric

 

[Rheilly Phoull]

On 17/01/15 8:50 AM, etpm@whidbey.com wrote:

I have a lot of inspection tools that use 1.55 volt button batteries.
If the voltage from the battery drops below 1.45 volts or so the
displays will start flashing. I use the silver oxide batteries, the
SR44 button ones. I only buy the name brand batteries because they
last the longest. I have tried on a couple tools using a 1.5 volt AA
battery but the damn scales are voltage sensitive so when the AA
battery voltage drops past the 1.45 volt limit, which happens pretty
fast, maybe 3 months, the display starts that flashing business. So I
was hoping that maybe a 3 . something volt battery and a voltage
regulator could be used to lengthen the battery change interval. For
the tools that can have a double A battery strapped on the back I
think the reg used wouldn't matter much. But most of the tools only
have room for a button battery so I would need a tiny efficient
voltage regulator. Is there such a beast?
Thanks,
Eric

Check the SMD versions??

 

[whit3rd]

On Saturday, January 17, 2015 at 10:25:41 AM UTC-8, et...@whidbey.com wrote:

On Sat, 17 Jan 2015 08:57:14 +0800, Rheilly Phoull
rheilly@bigslong.com> wrote:

On 17/01/15 8:50 AM, etpm@whidbey.com wrote:
[replacing one or more button batteries}
I ... need a tiny efficient
voltage regulator. Is there such a beast?

Yes, lots of 'em...

I was wondering if a linear would be best or should I be looking at a
switching type? And can I find a switching type on a chip that uses a
tiny external inductor?

Easiest to design and wire: LDO linear regulators, like
<http://www.ti.com/lit/ds/symlink/tps78001.pdf>
Most power-efficient: switching types.

But, you won't likely be fitting these inside an existing button-battery
compartment, because they all need connection to BOTH terminals
of their battery, and must connect to both terminals of the target device.
So, your best bet is to mount a power cord on the target device,
and use any old large batteries and regulators that may be handy.

 

On Sat, 17 Jan 2015 08:57:14 +0800, Rheilly Phoull
<rheilly@bigslong.com> wrote:

On 17/01/15 8:50 AM, etpm@whidbey.com wrote:
I have a lot of inspection tools that use 1.55 volt button batteries.
If the voltage from the battery drops below 1.45 volts or so the
displays will start flashing. I use the silver oxide batteries, the
SR44 button ones. I only buy the name brand batteries because they
last the longest. I have tried on a couple tools using a 1.5 volt AA
battery but the damn scales are voltage sensitive so when the AA
battery voltage drops past the 1.45 volt limit, which happens pretty
fast, maybe 3 months, the display starts that flashing business. So I
was hoping that maybe a 3 . something volt battery and a voltage
regulator could be used to lengthen the battery change interval. For
the tools that can have a double A battery strapped on the back I
think the reg used wouldn't matter much. But most of the tools only
have room for a button battery so I would need a tiny efficient
voltage regulator. Is there such a beast?
Thanks,
Eric

Check the SMD versions??

I was wondering if a linear would be best or should I be looking at a
switching type? And can I find a switching type on a chip that uses a
tiny external inductor?
Eric

 

Perhaps a Joule thief ?