On Wednesday 21 January 2009, Kalle Jokiniemi wrote: > > The TWL5030/4030 internal VUSB regulators are eating current > > like small piggies. > > Feral pigs are a big problem in many places ... > no surprise that feral code is too!
A simple but impacting point is a LDO when left on, wastes a lot of system power. If you have say 4.4v battery and it goes to a LDO which supports a 1.8v IO. The LDO will drop a lot of power on the floor. A design with a 3.6v batter to the same LDO drops less power. Twl5030 can consume a lot of power if your not watching at the system level. For processor rails VCORE (omap2), VDD1/VDD2 (omap3) at least there is a DCDC switcher which is somewhat efficient. This gives you your 1.2v with out dumping everything. Didn't know Dave was such a poet :) Regards, Richard W. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
