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external pass trans on chip reg.
external pass trans on chip reg.
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Old 25th November 2002, 11:22 AM   #1
tbla is offline tbla
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Join Date: Jul 2002
Location: denmark
Question external pass trans on chip reg.



does anybody know how to connect an external transistor on a 3 legged chip regulator ?
perhaps there is more than one way to do that ?

best regards,
troels
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Old 25th November 2002, 11:41 AM   #2
halojoy is offline halojoy  Sweden
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Join Date: Nov 2002
Default Higher currents

I know that there are such schematics in
regulated power supply - threads

But I searched the web.
Higher current operation

Sure there is more than one way to acheive this.

R1 sets the current limit for the IC.
0.7volts/5ohm= 0.140 Ampere

So at currents over like 0.140 A the transistor
starts to help with current.
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