Part Number: UC285 Other Parts Discussed in Thread: TPS7A39 , TIDA-01232 , TPS7A85 Team,
Customer need an LDO suggestions with the following specifications:
1)Input voltage: 6 V
Output Voltage: 5.5V @ 10Amps
2)Input voltage: 5.5V
Output Voltage: 5 V @ 1…
Hi Joe,
I got you points and I can see the need to reduce the Rblast to a level that will cause less voltage drop especially at higher current. In the TIDA-01232 document, the first paragraph on Page 8, it discusses possible ways to reduce Rshare by measuring…
Hi Ross,
If you are attempting to parallel the two LDO outputs, please refer to the following TI Designs for how to parallel the outputs.
www.ti.com/.../TIDA-00270
www.ti.com/.../TIDA-01232
Very Respectfully,
Ryan
Hi Ryan,
Thanks for your suggestion. I may need to use adjustable output mode option as well in addition to ANY-OUT, so how should I connect FB pin during 2x LDO in parallel.
I understand ANYOUT from your reference schematic (TIDA-01232) that ANYOUT config…
Part Number: LP3874-ADJ Other Parts Discussed in Thread: TPS7A85A , TPS7A84A , TPS7A83A , , TIDA-01232 Hi Support,
If I need to output more than 0.8A of current, can I connect 2 of these LDOs in parallel? Any risk or issue?
Thanks.
Dear Eric,
Design TIDA-01232 in application note tiduc7.pdf is exactly what we need: retain the ultra low noise and good PSRR performance of the TPS7A47-Q1 at the expense of slightly lower load regulation. The application note is very comprehensive and…
Hi ,
You are able to use the same concepts illustrated in the following TI Design to parallel TPS7A85A. Due to your low Vin, we would recommend that you use a BIAS rail to improve dc and ac performance.
www.ti.com/.../TIDA-01232
Very Respectfully…
Hi Jerry,
Unfortunately we do not have any negative LDOs that are able to handle 2 A; however, we do have several negative voltage regulators that could be used in a current sharing application. You can find our selection of negative voltage regulators…
Hi Rich,
In order to have a maximum of 4% mismatch, we need to make sure that the current driven by the op-amp through the resistor is greater than the current resulting in a 4% deviation in output voltage:
Current from op-amp > current through top r…
Hi Tiffany,
We do not have a single chip solution for 6 A with your required voltage rails; however, we do have a couple of TI Designs that discuss methods for using a couple LDOs to meet the current requirement through current sharing:
Very Respectfully…