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I am designing a Power Circuitry for a Application that needs to feed 1x Beaglebone Black (5v), 1x Device with 600mA (5v), and 2x XBeePro Modules (3.3v)

via a 2S (7.4v 1Ah LiPo) Pack.

The Plan of action was to use 1x 5v@3A Switching Regulator to give power to the BeagleBone, the Other device and an LM1117 which will give 3.3v to the XBees. Is this approach Correct?

While choosing a DC DC Buck Rectifier, of how much importance does the switching frequency play?

Can i use a MAX16909 for my Application?

Is there any other Switching Regulator for Battery Supplies that i can use? The power source will be a 2S Lipo Battery rated for 1Ah. The MAX16909 takes input from 3.5V to 36V. Should i look for an IC that takes input from 5v-12v for efficiency?

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  • \$\begingroup\$ Just an update. I found a triple buck switching regulator TI652510 JUst curious what the footprint size will be. \$\endgroup\$ – user2967920 Jan 7 '15 at 14:06
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LTC3633 Does the job for +5v and +3.3v Voltage Generation.

What I learnt from enough RnD is Switching Supply for Production Level Designs and Linear Regulation for Development and Testing (Fast Prototyping Environments where u dont need to worry much about Efficiency).

I am looking into doing a digital control for the outputs now via the LTC1157 where the Vcc's of the Modules can be controlled by a digital 3.3v tolerant pin.

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