Part Number: TPS3895
TPS3895 SENSE_OUT status is unknown during power on before VPOR and is shown in below highlighted area.
A 10k-ohm pull low resistor is used but during power on there is still a spike on SENSE_OUT.
May I know if there is any way to make sense_out low during power on?
We have a solution to keep the SENSE_OUT low until the VCC comes up then the device works as normal (SENSE_OUT will be just slightly lower than normal when "high"). It requires 2 external MOSFETS and 2 external resistors at the output. Q1 is N-FET and Q2 is P-FET. See solution below.
Will this solution work for you?
In reply to Michael DeSando1:
In reply to Ting Ye:
We have ran some simulations and we believe this solution is valid. See the schematic and results below. Note: I have the SENSE_OUT pulled low until Vcc reaches ~1.5V which should be fine since the minimum recommended operating voltage is 1.7V.
Some bench testing is still needed but I have some parts to aim for now.
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.