Other Parts Discussed in Thread: , TPS7A85
Hello all -
I require a high current and low noise (High PSRR + low output noise) 7.5V supply that is capable up to about 2A. We also require good transient response ~100mV pk-pk change settling within 3-5us with a 10mA-2A pulse. The 2A-10mA transition can yield more of a spike.
Normally, you'd use high ballast resistors or try to use opamps in the feedback network; however ballasting is inefficient and the opamp solution seems complex.
This appnote describes a very similar part being used in parallel by joining the NR pins. It seems that by doing this, you're pretty much guaranteed to be within 0.1% from part to part; which makes ballasting very easy. In the appnote, they've used 5mOhm PCB traces for this.
My question is, can the TPS7A47 be used in the same manner?
I would normally just buy a couple evaluation kits and try it; but it seems that these aren't available. I'm skeptical of using simulation, as I don't believe it accounts for device-device variations - and it may give me a false positive.
Can anyone comment on this?
thank you -