Hi
I have two circtuis on a common ground. The voltage on each circuit is regulated by its own V regulator (LP2951): One at 3.0V the other at 5.0V.
The 3.0V supplies a SD card, the 5.0V supplies a set of sensors.
What I notice is that every time the SD card is written to, there is a voltage (up or down) spike on the 5.0V supply!
I am using a 68uF cap on each of the V regulators.
Can someone please help me in eliminating/ reducing the V spikes on the sensor 5.0V regulated supply?
Thank you in advance.
a.
I have two circtuis on a common ground. The voltage on each circuit is regulated by its own V regulator (LP2951): One at 3.0V the other at 5.0V.
The 3.0V supplies a SD card, the 5.0V supplies a set of sensors.
What I notice is that every time the SD card is written to, there is a voltage (up or down) spike on the 5.0V supply!
I am using a 68uF cap on each of the V regulators.
Can someone please help me in eliminating/ reducing the V spikes on the sensor 5.0V regulated supply?
Thank you in advance.
a.