×

SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.

avatar

David W

Member Since: January 13, 2011

Country: United States

Profile

Mechanical and Electronics engineer. Past includes thermal design of military computer systems, present and future in the medical device industry.

  • Has this been tested at 500mA output current? The MIC5219 would be dissipating ~0.85W at 500mA output [(5-3.3)*0.5]. Theta-ja is 220C/W, which would lead to about a 190C temp rise. I don’t know what the duty cycle of a XBee pro going “full bore”, but any design assuming the 3.3V regulator can sustain 500mA from a 5V input will quickly release the smoke.