Voltage Regulator-Down (VRD) 10.0 Design Guide Addendum

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VRD Design Guide Addendum
Figure 5. Example Socket Vcc Overshoot Waveform
Example Overshoot Waveform
1.490
1.500
1.510
1.520
1.530
1.540
1.550
1.560
1.570
1.580
0.0E+00 5.0E-06 1.0E-05 1.5E-05 2.0E-05
Time
Voltag
e
Overshoot Waveform VID Referenc e
Maximum Voltage Rule:
V
OS
= 1.570
VID = 1.550
Maximum voltage criteria
satisfied
Settling Time Rule:
Initial VID crossing: 0.5 µs
Final VID crossing: 16.5 µs
T
OS
= Final VID
crossing–Initial VID crossing
Time above VID criteria satisfied
Overshoot compliant to
specification
V
OS-MAX
= 50 mV
VID + V
OS-MAX
= 1.600 V
V
OS
< VID + V
OS-MAX
T
OS
= 16.5 µs - 0.5 µs = 16 µs
T
OS-MAX
= 25 µs
T
OS
< T
OS-MAX