Hey guys, does anyone know the vr_ready pin for this ic for epower mod. px3544 was pin 15. Want to do a 8800gtx epower mod. Thanks.

 

PX3540 datasheet, PX3540 PDF, Graphics Processor Digital Multiphase Controller - Primarion

I've seen some people desolder the whole IC, maybe that could work.

primarion PX3540 it has same configuration pin out like PX3544 , so p_good/vr_ready is same pin 15.

 

VDD(3.3v) is pin36

GND is pin 25

vr_ready pin15

OCP per phase:

phase4 pin 28( NC on px3540 and 8800GTS 640/320mb)

phase3 pin 31

phase2 pin 34

phase1 pin 38

 

 

PX3544 can be used in DC-DC converters up to 130A and 1 to 4 phase pwm

PX3540 can be used in DC/DC converters up to 200A up to six phase digital multiphase controller.

 

also PX3544 it has more features like oldest PX3540

-Multiple Internal and External Temperature Limits

-Configurable latched fault or autonomous recovery shutdown

-Single +3.3V supply operation

Edited July 17, 20169 yr by nachtfalke