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I'm using a power management IC (PMIC) with a lower max Vin than I want to supply. Is the solution to this as simple as adding a separate, greater voltage regulator in front of it?

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    \$\begingroup\$ Yes, you have to regulate the voltage down to something that the PMIC can handle. It doesn't have to be a great regulator (can have more noise/ripple/variation than normal). And it's not a Zener diode. \$\endgroup\$ – user3624 Jun 27 '13 at 3:20
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    \$\begingroup\$ Which IC are you using? What is your supply voltage? How much current? \$\endgroup\$ – Nick Alexeev Jun 27 '13 at 5:33
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    \$\begingroup\$ I'm using the TPS650532 (driving a TMS320DM368). The supply would be a 7.4V battery, with the DM368 not drawing more than 1A. I'm also trying to figure out if I can run a large current load (15A) off the same battery (for motors) without a huge, negative impact on the DM368. \$\endgroup\$ – Crunchy Jun 27 '13 at 7:33
  • \$\begingroup\$ I'm not sure the TPS650532 is best suited for your application. What is your input voltage range and what are your output voltages(s) and currents. \$\endgroup\$ – Andy aka Jun 27 '13 at 10:01
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Yes, it is. It can be a switching or linear regulator.

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