ISL62881 Datasheet, PDF (31/35 Pages) Intersil Corporation – Single-Phase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

ISL62881, ISL62881B
Typical Performance (Continued)
FIGURE 33. CPU MODE SHUT DOWN, V_IN = 19V,
I_O = 0A, VID = 1.2V, Ch1: PHASE, Ch2: V_O
FIGURE 34. GPU MODE SHUT DOWN, V_IN = 19V,
I_O = 0A, VID = 1.2V, Ch1: PHASE, Ch2: V_O
FIGURE 35. CCM STEADY STATE, CPU MODE, V_IN = 8V,
I_O = 1A, VID = 1.2375V, Ch1: PHASE,
Ch2: V_O
FIGURE 36. DCM STEADY STATE, CPU MODE,
V_IN = 12V, I_O = 1A, VID = 1.075V, Ch1:
PHASE1, Ch2: V_O, Ch3: COMP, Ch4: LGATE
Phase Margin
Gain
FIGURE 37. GPU MODE REFERENCE DESIGN LOOP GAIN
T2(s) MEASUREMENT RESULT
31
1000
900
800
700
600
500
400
300
200
100
0
0
IMON
TARGET
2 4 6 8 10 12 14 16 18 20 22
I_OUT (A)
FIGURE 38. IMON, VID = 1.2375
FN6924.0
October 26, 2009