Voltage Regulator-Down (VRD) 10.1 Design Guide

Processor Vcc Requirements
R
Design Guide 21
Figure 2-4. Examples of High Volume Manufacturing Load Line Violations
Example A: This load line
satisfies voltage limits, but will
violate specifications as the VR
TOB varies across the minimum
to maximum range
Example B: Vccmax violation
when component tolerance shift
Load Line to the upper TOB
limits
Example C: Vccmin violation
when component tolerance shift
Load Line to the lower TOB
limits
VID VID
VID
Vccmin LL
Vccmax LL Vccmax LL Vccmax LL
Vccmin LL Vccmin LL
Measured Load Line 3-σ Manufacturing LL 3-σ Manufacturing LL
Vccmax
Violation
Vccmin
Violation
Figure 2-5. High Volume Manufacturing Compliant Load Line
Example A: Measured load line
satisfies slope specification
and is centered in the LL
window
Example B: When component
tolerances shift the load line to
the lower TOB limits, the 3-σ
manufacturing LL is bounded by
the Vccmin LL
Example C: When component
tolerances shift the load line to
the upper TOB limits, the 3-σ
manufacturing load line is
bounded by the Vccmax LL
VID VID VIDVccmax LL Vccmax LL
Vccmax LL
Measured Load Line
3-σ Manufacturing LL 3-σ Manufacturing LL
Vccmin LL Vccmin LL Vccmin LL