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  1. #1
    Junior Member level 1
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    LDO LM1085 alternative? Power supply for GSM module

    Hi boys,
    I need LDO IC to my new design, for SIM900 GSM module supply. LM317 is poor, so I found LM1085. I need DPAK - TO252 package, but local supplier dosnīt have it. Price on farnell is very high. I need LDO IC with input voltage min 16V and adjustable (4V) output with 2-3A peak current in DPAK.

    My price idea is about 2-3 USD / pcs with 200pcs order.

    Can you help me, anybody?

    Many thanks,
    Petr

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  2. #2
    Advanced Member level 4
    Points: 6,490, Level: 19

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    Re: LDO LM1085 alternative? Power supply for GSM module

    With a linear regulator, at 16v input and 4v output at 2A, you would be dissipating 24W of heat, do you have a heatsink for that?
    You need a switching converter, and that is hard to do for 2-3USD.



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