ISL6237 Datasheet, PDF (13/35 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

ISL6237
Typical Performance Curves
Circuit of Figures 62, 63 and 64, no load on LDO, OUT1, OUT2, and REF, V_IN = 12V,
EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V, V_{EN_LDO} = 5V, T_A = -40°C to +100°C, unless
otherwise noted. Typical values are at T_A = +25°C. (Continued)
450
400
350
300
PWM
250
200
150
100
ULTRA-SKIP
50
0
0.001
SKIP
0.010
0.100
1.000
OUTPUT LOAD (A)
10.000
40
PWM
35
30
ULTRA-SKIP
25
20
SKIP
15
10
5
0
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 27. V_OUT1 = 5V FREQUENCY vs LOAD
FIGURE 28. V_OUT1 = 5V RIPPLE vs LOAD
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
4.88
4.86
4.84
0
BYP = 0V
BYP = 5V
50
100
150
200
OUTPUT LOAD (mA)
FIGURE 29. LDO OUTPUT 5V vs LOAD
3.35
3.30
3.25
BYP = 0V
3.20
3.15
3.10
BYP = 3.3V
3.05
3.00
0
50
100
150
200
OUTPUT LOAD (mA)
FIGURE 30. LDO OUTPUT 3.3V vs LOAD
50
45
40
35
30
25
20
7 9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 31. PWM NO LOAD INPUT CURRENT vs V_IN
(EN = EN2 = EN_LDO = VCC)
13
1400
1200
1000
800
600
400
200
0.0
7
9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 32. SKIP NO LOAD INPUT CURRENT vs V_IN
(EN1 = EN2 = EN_LDO = VCC)
FN6418.4
March 18, 2008