DLPS052 October 2015 DLPA3000
The DLPA3000 is designed to operate from a 6 V to 20 V input voltage supply or battery. To avoid insufficient supply current due to line drop, ringing due to trace inductance at the VIN terminals, or supply peak current limitations, additional bulk capacitance may be required. In the case of ringing that is caused by the interaction with the ceramic input capacitors, an electrolytic or tantalum type capacitor may be needed for damping.
The amount of bulk capacitance required should be evaluated such that the input voltage can remain in spec long enough for a proper fast shutdown to occur for the VOFFSET, VRESET, and VBIAS supplies. The shutdown begins when the input voltage drops below the programmable UVLO threshold, such as when the external power supply or battery supply is suddenly removed from the system.