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Altera_Forum's avatar
Altera_Forum
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14 years ago

Cyclone III FPGA power supply problem

hello, i am working on fpga based project. i m using cyclone3 fpga. in dat we hav 1.2v n 3.3v supplies necessary for i/o operation. we are using two TPS54310 ic's for both the supplies. we connect...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

It's not actually a question related to Altera FPGA. Anyway...

TPS54310 doesn't exist. Do you mean TPS54311?

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pin17 shud be 2.7v but we r getting 2.8v

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Read the datasheet once again.

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pin2 shud be 0.9v but we r getting 0.4v

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You either overload the 3.3V node or your circuit is wrong somehow. Did you try to disconnect the load? You should show a complete schematic.