ISL62381 Datasheet, PDF (9/23 Pages) Intersil Corporation – High-Efficiency, Quad or Triple-Output System Power Supply Controller for Notebook Computers

ISL62381, ISL62382, ISL62383
Pin Descriptions (Continued)
PIN NUMBER
28 LD 32 LD NAME
FUNCTION
28
32
FB2 SMPS2 feedback input used for output voltage programming and regulation.
Bottom Bottom
Pad
Pad
GND Analog ground of the IC. Unless otherwise stated, signals are reference to this GND.
Typical Performance
100
V_IN = 7V
95
90
85
V_IN = 12V
80
75
V_IN = 19V
70
65
60
0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5
I_OUT (A)
FIGURE 5. CHANNEL 1 EFFICIENCY AT V_O = 3.3V
100
95
90
85
V_IN = 12V
V_IN = 7V
80
V_IN = 19V
75
70
65
60
0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5
I_OUT (A)
FIGURE 6. CHANNEL 2 EFFICIENCY AT V_O = 5V
V_O1
FB1
PGOOD1
PHASE1
FIGURE 7. POWER-ON, V_IN = 12V, LOAD = 5A, V_O = 3.3V
V_O1
FB1
PGOOD1
PHASE1
FIGURE 8. POWER-OFF, V_IN = 12V, I_O = 5A, V_O = 3.3V
9
FN6665.4
August 7, 2008