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TPS63030: TPS63060 Laser Driver

Part Number: TPS63030
Other Parts Discussed in Thread: TPS63060

Tool/software:

I am trying to driver a laser diode using the TPS63060. I have a variable power source from 3-6VDC (Vin). The laser diode has a Vforward of 2.5V.  During power up the circuit goes out of regulation, yet when I put a resistive load everything works fine. Is there something during power up that dos not like a diode load?