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Battery powered USB charger

posted Jun 14, 2013, 12:35 PM by Quoc-Anh Vuong   [ updated Jun 14, 2013, 2:26 PM ]
LT1302 - 5VDC Step up from 3V, or 2 AA/AAA batteries
http://www.linear.com/product/LT1302

LM7805, fixed 5VDC regulator. Drop out of 2.5V
http://www.fairchildsemi.com/ds/LM/LM7805.pdf

LM317, Adjustable regulator
http://www.fairchildsemi.com/ds/LM/LM317.pdf

LP2954, low dropout regulator
http://www.ti.com/product/lp2954

LP2940, low dropout regulator
http://www.ti.com/lit/ds/symlink/lm2940-n.pdf

LT1117-5, Low dropout voltage regulator
http://www.linear.com/product/LT1117


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