ISL62881C Datasheet, PDF (33/37 Pages) Intersil Corporation – Single-Phase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

ISL62881C, ISL62881D
Typical Performance (Continued)
FIGURE 34. CPU MODE SHUT DOWN, V_IN = 19V,
I_O = 0A, VID = 1.2V, Ch1: PHASE, Ch2: V_O
FIGURE 35. GPU MODE SHUT DOWN, V_IN = 19V,
I_O = 0A, VID = 1.2V, Ch1: PHASE, Ch2: V_O
FIGURE 36. CCM STEADY STATE, CPU MODE, V_IN = 8V,
I_O = 1A, VID = 1.2375V, Ch1: PHASE,
Ch2: V_O
FIGURE 37. 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 38. GPU MODE REFERENCE DESIGN LOOP GAIN
T2(s) MEASUREMENT RESULT
1000
900
800
700
600
500
400
300 ^TARGET
200
V_IN = 19V
V_IN = 12V
100
0
0
24
V_IN = 8V
6 8 10 12 14 16 18 20
I_OUT (A)
FIGURE 39. IMON, VID = 1.2375
33
FN7596.0
March 8, 2010