Low quiescent current 78M05 equivalent
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Low quiescent current 78M05 equivalent
by Vitaliy-14
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We're designing a device that is powered from the car battery, that must be
able to enter low power "sleep" mode. Unfortunately, the 78M05 has a quiescent current of 3mA (too high for this application). There are regulators that meet this requirement, but they are considerably more expensive. Are there any alternatives in the same price range as the 78M05? Vitaliy -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: Low quiescent current 78M05 equivalent
by M.L.-2
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On Mon, Oct 12, 2009 at 4:45 PM, Vitaliy <piclist@...> wrote:
> We're designing a device that is powered from the car battery, that must be > able to enter low power "sleep" mode. Unfortunately, the 78M05 has a > quiescent current of 3mA (too high for this application). > > There are regulators that meet this requirement, but they are considerably > more expensive. Are there any alternatives in the same price range as the > 78M05? > > Vitaliy There are many that meet that requirement, however; I'm sure you have a few other requirements such as output current, input voltage, package type. Generally speaking, LDOs have low quiescent current (e.g. LP2992 at 65uA with no load) there are thousands of varieties so I can't be more specific. -- Martin K. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: Low quiescent current 78M05 equivalent
by Forrest W Christian-2
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I use a LM2936 (TO-92) and a LM2937 (TO-220) but like you said, more
than you want. In reviewing my list of commonly used and relatively inexpensive parts (aka the jameco catalog), I came up with the following: LP2950 - 100mA 5V TO-92. $.50 in qty. 75uA Quiescent You can also search the national semiconductor catalog at http://www.national.com/cat/index.cgi?i=i//232 If you click on show all columns at the top, you'll get quiescent current as a search option, along with $1k pricing. Vitaliy wrote: > We're designing a device that is powered from the car battery, that must be > able to enter low power "sleep" mode. Unfortunately, the 78M05 has a > quiescent current of 3mA (too high for this application). > > There are regulators that meet this requirement, but they are considerably > more expensive. Are there any alternatives in the same price range as the > 78M05? > > Vitaliy > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: Low quiescent current 78M05 equivalent
by enkitec
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Maybe the Microchip TC1015 would be an option. Some $.30 and 50uA. Mark Jordan Forrest W Christian wrote: > I use a LM2936 (TO-92) and a LM2937 (TO-220) but like you said, more > than you want. > > In reviewing my list of commonly used and relatively inexpensive parts > (aka the jameco catalog), I came up with the following: > > LP2950 - 100mA 5V TO-92. $.50 in qty. 75uA Quiescent > > You can also search the national semiconductor catalog at > http://www.national.com/cat/index.cgi?i=i//232 > > If you click on show all columns at the top, you'll get quiescent > current as a search option, along with $1k pricing. > > > > > Vitaliy wrote: > >> We're designing a device that is powered from the car battery, that must be >> able to enter low power "sleep" mode. Unfortunately, the 78M05 has a >> quiescent current of 3mA (too high for this application). >> >> There are regulators that meet this requirement, but they are considerably >> more expensive. Are there any alternatives in the same price range as the >> 78M05? >> >> Vitaliy >> >> > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: Low quiescent current 78M05 equivalent
by PICdude-3
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I've also looked for this too, and most of the Microchip offerings
have a very low input voltage range. The LM2937 is not very low quiescient either. IIRC the MIC2940A is a good choice and relatively bearable cost-wise (not great though). Don't have the info with me here, but Digikey or Mouser has it. Cheers, -Neil. Quoting enkitec@...: > > Maybe the Microchip TC1015 would be an option. Some $.30 and 50uA. > > Mark Jordan > > > Forrest W Christian wrote: >> I use a LM2936 (TO-92) and a LM2937 (TO-220) but like you said, more >> than you want. >> >> In reviewing my list of commonly used and relatively inexpensive parts >> (aka the jameco catalog), I came up with the following: >> >> LP2950 - 100mA 5V TO-92. $.50 in qty. 75uA Quiescent >> >> You can also search the national semiconductor catalog at >> http://www.national.com/cat/index.cgi?i=i//232 >> >> If you click on show all columns at the top, you'll get quiescent >> current as a search option, along with $1k pricing. >> >> >> >> >> Vitaliy wrote: >> >>> We're designing a device that is powered from the car battery, that must be >>> able to enter low power "sleep" mode. Unfortunately, the 78M05 has a >>> quiescent current of 3mA (too high for this application). >>> >>> There are regulators that meet this requirement, but they are considerably >>> more expensive. Are there any alternatives in the same price range as the >>> 78M05? >>> >>> Vitaliy >>> >>> >> >> > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: Low quiescent current 78M05 equivalent
by Forrest W Christian-2
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Hmmm... thought the 2937 was lower than 2ma... oh well.
-forrest Neil wrote: > I've also looked for this too, and most of the Microchip offerings > have a very low input voltage range. The LM2937 is not very low > quiescient either. IIRC the MIC2940A is a good choice and relatively > bearable cost-wise (not great though). Don't have the info with me > here, but Digikey or Mouser has it. > > Cheers, > -Neil. > > > > Quoting enkitec@...: > > >> Maybe the Microchip TC1015 would be an option. Some $.30 and 50uA. >> >> Mark Jordan >> >> >> Forrest W Christian wrote: >> >>> I use a LM2936 (TO-92) and a LM2937 (TO-220) but like you said, more >>> than you want. >>> >>> In reviewing my list of commonly used and relatively inexpensive parts >>> (aka the jameco catalog), I came up with the following: >>> >>> LP2950 - 100mA 5V TO-92. $.50 in qty. 75uA Quiescent >>> >>> You can also search the national semiconductor catalog at >>> http://www.national.com/cat/index.cgi?i=i//232 >>> >>> If you click on show all columns at the top, you'll get quiescent >>> current as a search option, along with $1k pricing. >>> >>> >>> >>> >>> Vitaliy wrote: >>> >>> >>>> We're designing a device that is powered from the car battery, that must be >>>> able to enter low power "sleep" mode. Unfortunately, the 78M05 has a >>>> quiescent current of 3mA (too high for this application). >>>> >>>> There are regulators that meet this requirement, but they are considerably >>>> more expensive. Are there any alternatives in the same price range as the >>>> 78M05? >>>> >>>> Vitaliy >>>> >>>> >>>> >>> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> >> > > > > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: Low quiescent current 78M05 equivalent
by Vitaliy-14
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Mark wrote:
> Maybe the Microchip TC1015 would be an option. Some $.30 and 50uA. Two problems: maximum input voltage is only 6.5 volts, and we need at least 200 mA on the output. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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Re: Low quiescent current 78M05 equivalent
by Vitaliy-14
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M.L. wrote:
>> We're designing a device that is powered from the car battery, that must >> be >> able to enter low power "sleep" mode. Unfortunately, the 78M05 has a >> quiescent current of 3mA (too high for this application). >> >> There are regulators that meet this requirement, but they are >> considerably >> more expensive. Are there any alternatives in the same price range as the >> 78M05? >> >> Vitaliy > > There are many that meet that requirement, however; I'm sure you have > a few other requirements such as output current, input voltage, > package type. I wish they were many! :) Or maybe I just need to check my vision... I said "78M05", but I guess I should have been more specific regarding current rating. 500 mA would be great, but basically anything above ~200 mA should work. The maximum input voltage is ~20V. Vitalij -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist |
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