• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 63 subscribers
  • Views 546 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Power Supply for GSM module TPS54260 vs LM25011

Zuzana Skrivanova
Prodigy 10 points
Other Parts Discussed in Thread: TPS54260, LM25011, TPS62140, TPS62175

Suggest a power supply for GSM modem.
3,8V,sleep mode consuption under 1mA, average consumption 22mA, peak consuption burst 2A 500us
Input voltage 12V (6 -24).
A good choice would probably be use TPS54260 http://www.ti.com/lit/an/slva412/slva412.pdf
Unfortunately,due to the pricing policy of Farnell is in the EU TPS54260 overpriced.

http://de.farnell.com/texas-instruments/tps54260dgq/ic-buck-reg-2-5a-10msop/dp/1815769.

In search of cheaper variants we came across LM25011.
I'm not sure whether it is suitable,
- that can handle small sampling in sleep mode 1mA
- which will be effective in comparison with TPS54260

Possibly recommend another IC suitable for this type of use.

  • 0
    TI__Genius 11490 points

    Hi Skrivanova,

    The IQ of the LM25011 is 1.2mA typ. So it is probably not going to make <1mA spec. Other two specs should be fine.

     

  • 0
    TI__Guru**** 151520 points

    6V - 24V is quite a wide range.  Perhaps there are multiple systems that would use this?  If so, this gives a not optimized power architecture for the lower input voltage systems.

    TPS62140 is very small and very low Iq with excellent transient response.  It's great for GSM, though cannot support 24Vin.

    Otherwise, TPS62175 can support 24Vin but only 500 mA.  About 2 mF of Cout would be needed on the output to support the peak current with ~300 mV drop.

    Last option is to use a lower voltage is the system, such as 5V or 3.3V, and run the GSM power supply off of this with a lower voltage converter.