
6 Device PowerSupply General Purpose Power Supply (GPDPS)
150 System Reference, January 2001
Figure 63 Relation Between Load Capacitance and Voltage Ripple - Range 4
m
Examples of Dynamic Load Performance
To illustrate the GPDPS characteristics, examples of
measurement plots are illustrated in the following figures.
The measurement setup used is shown in Figure 64. One
measurement for each performance range has been
performed using a hand-wired loadboard. In performance
ranges 1 and 2, low ESR (Equivalent Series Resistance)
capacitors have been used and in performance ranges 3
and 4 through-hole electrolytic capacitors.
The current step response at the GPDPS pin has been
measured for each performance range using an adequate
current step and load capacitance.
In general you will observe that:
• the voltage ripple is less than 200mV in all perfor-
mance ranges
• it takes less than 1ms to recover the original voltage
supply level in all performance ranges
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