TI E2E Community
Sitara Processors Forum
separate LDO for VRTC required when using TPS65217?
Paul and others mention a power sequencing issue in post http://e2e.ti.com/support/dsp/sitara_arm174_microprocessors/f/791/t/151486.aspx :
The EXT_WAKEUP output buffer is powered by the VDDS_RTC power domain. This signal is what controls the TPS65910 when operating in the sleep mode where only the AM335x RTC is powered on.
Therefore, you must have a separate voltage regulator to source the VDDS-RTC supply form the battery if you plan to use the EXT_WAKEUP output to control the TPS65910.
Is the above also required when using the TPS65217B + AM3352 ?
Or can I just power VRTC by the always on VLDO1?
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.