TI E2E Community
TLV62080 - pull-up resistor voltage
Welcome to the Non-Isolated DC/DC Section of the TI E2E Support Community. Ask questions, share knowledge, explore ideas, and help solve problems with fellow engineers. To post a question, click on the forum tab then "New Post".
I would have like to use TLV62080 with a 3.3Vin and 0.95V out.
But I would have like to connect the pull-up resistor to the 3.3Vin instead of the TLV62080's output. Can I do that?
On the datasheet it is mentioned that we are recommending to connect the pull-up resistor to the TLV62080's output.
The pull-up resistor can be connected to any voltage within the absolute maximum ratings for the device. The recommendation to pull it up to the output is to properly determine the state of the output voltage when the TLV62080 is off. If the resistor is pulled up to Vout, the output voltage would presumably be low when the device was off and thus the PG voltage would also be low. This is the correct state.
But if it is connected to another rail, that rail might be up and active even though the TLV62080 is off. Because the PG pin is high impedance when the TLV62080 is off, now we get the wrong state for PG--it would be pulled up high even though the TLV62080 is off and its output is not up.
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.