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ISL62871 Datasheet, PDF (21/25 Pages) Intersil Corporation – PWM DC/DC Controller With VID Inputs For Portable GPU Core-Voltage Regulator
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ISL62871, ISL62872
Typical Performance Curves
100
95
VIN = 8V
90
85
VIN = 12.6V
80
VIN = 19V
75
70
65
60
55
50
0 2 4 6 8 10 12 14 16 18 20
IOUT (A)
FIGURE 18. EFFICIENCY AT VOUT = 1.1V
1.0
0.8
0.6
0.4
0.2
VIN = 19V
0.0
VIN = 8V
-0.2
VIN = 12.6V
-0.4
-0.6
-0.8
-1.0
0 2 4 6 8 10 12 14 16 18 20
IOUT (A)
FIGURE 19. LOAD REGULATION AT VOUT = 1.1V
1.0
0.8
0.6
0.4
VIN = 19V
0.2
VIN = 12.6V
0.0
-0.2
VIN = 8V
-0.4
-0.6
-0.8
-1.0
0 2 4 6 8 10 12 14 16 18 20
IOUT (A)
FIGURE 20. SWITCHING FREQUENCY AT VOUT = 1.1V
EN
SREF
VOUT
PGOOD
EN
SREF
VOUT
PGOOD
FIGURE 21. START-UP, VIN = 12.6V, VOUT = 1.05V, LOAD = 10A
EN
PGOOD
20µs
SREF
VOUT
FIGURE 22. START-UP INTO 750mV PRE-BIASED OUTPUT,
VIN = 12.6V, VOUT = 1.05V, LOAD = 10A
21
FIGURE 23. SHUT-DOWN, VIN = 12.6V, VOUT = 1.05V,
LOAD = 50mΩ
FN6707.0
August 14, 2008
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