ISL62882_14 Datasheet, PDF (35/42 Pages) Intersil Corporation – Multiphase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

ISL62882, ISL62882B
Typical Performance
92
90
88
86
84
82
V_IN = 8V
VIN = 12V
80
78
V_IN = 19V
76
74
72
70
0
5 10 15 20 25 30 35 40 45 50 55
I_OUT (A)
FIGURE 32. 2-PHASE CCM EFFICIENCY, VID = 1.075V,
V_IN1 = 8V, V_IN2 = 12.6V AND V_IN3 = 19V
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0
5 10 15 20 25 30 35 40 45 50 55 60 65
I_OUT (A)
FIGURE 33. 2-PHASE CCM LOAD LINE, VID = 1.075V,
V_IN1 = 8V, V_IN2 = 12.6V AND V_IN3 = 19V
90
V_IN = 8V
85
80
V_IN = 12V
75
V_IN = 19V
70
65
60
55
0.1
1
10
100
I_OUT (A)
FIGURE 34. 1-PHASE DEM EFFICIENCY, VID = 0.875V,
DPRSLPVR IS ASSERTED FOR I_OUT < 3A, V_IN1 = 8V,
V_IN2 = 12.6V AND V_IN3 = 19V. SOLID LINES:
ISL62882 EFFICIENCY, DOTTED LINES: WOULD-BE
EFFICIENCY IF LGATE1b WAS NOT TURNED OFF IN
DPRSLPVR MODE
0.885
0.875
0.865
0.855
0.845
0.835
0.825
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
I_OUT (A)
FIGURE 35. 1-PHASE DEM LOAD LINE, VID = 0.875V, DPRSLPVR
IS ASSERTED FOR I_OUT < 3A
V_IN1 = 8V, V_IN2 = 12.6V AND V_IN3 = 19V
FIGURE 36. 2-PHASE CPU MODE SOFT-START, V_IN = 19V,
I_O = 0A, VID = 0.95V, Ch1: PHASE1, Ch2: V_O, Ch3:
PHASE2
35
FIGURE 37. 2-PHASE CPU MODESHUT DOWN, V_IN = 19V,
I_O = 1A, VID = 0.95V, Ch1: PHASE1, Ch2: V_O, Ch3:
PHASE2
FN6890.4
June 21, 2011