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N64 voltage regulator PQ7VZ5

gorgyrip

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I can't find it for sale. Is it ok if I replace it with LM317? Or maybe someone knows a direct replacement.
I've attached the schematic.
Datasheet is here:
 

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Trimesh

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I don't think a LM317 is going to work - that has a dropout voltage of between 1 and 2 volts depending on operating conditions - and the output of that regulator is only 650mV lower than the input - the spec sheet says the dropout is < 500mV, so that's probably your limiting parameter.
 

gorgyrip

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I don't think a LM317 is going to work - that has a dropout voltage of between 1 and 2 volts depending on operating conditions - and the output of that regulator is only 650mV lower than the input - the spec sheet says the dropout is < 500mV, so that's probably your limiting parameter.

Thank you. What voltage regulator should i try?
 

Trimesh

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Thank you. What voltage regulator should i try?

You could try this one:


2.5V-16V input
500mA load capacity
300mV dropout at full load

It's got an 800mV reference voltage, so you are going to need feedback resistors with a ratio of 2.3125:1 - if you use 0.1% resistors and 5k to ground and 11.5k to the output you should get 2.64V out, which should be close enough...
 

gorgyrip

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Thank you. I will search for them. (i need 2)
 

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