ISL6237 Datasheet, PDF (10/35 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)
7 V_IN SKIP MODE
7 V_IN PWM MODE
7 V_IN ULTRA SKIP MODE
12 V_IN SKIP MODE
2.5 ^{12 VIN PWM MODE}
12 V_IN ULTRA SKIP MODE
25 V_IN SKIP MODE
25 V_IN PWM MODE
25 V_IN ULTRA SKIP MODE
7 V_IN SKIP MODE
7 V_IN PWM MODE
7 V_IN ULTRA SKIP MODE
12 V_IN SKIP MODE
2.5 ^{12 VIN PWM MODE}
12 V_IN ULTRA SKIP MODE
25 V_IN SKIP MODE
25 V_IN PWM MODE
25 V_IN ULTRA SKIP MODE
2.0
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 9. V_OUT2 = 1.05V POWER DISSIPATION vs LOAD
(300kHz)
0
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 10. V_OUT1 = 1.5V POWER DISSIPATION vs LOAD
(200kHz)
7 V_IN SKIP MODE
7 V_IN PWM MODE
7 V_IN ULTRA SKIP MODE
12 V_IN SKIP MODE
3.5 ^{12 VIN PWM MODE}
12 V_IN ULTRA SKIP MODE
25 V_IN SKIP MODE
25 V_IN PWM MODE
25 V_IN ULTRA SKIP MODE
3.0
2.5
2.0
1.5
1.0
0.5
0
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 11. V_OUT2 = 3.3V POWER DISSIPATION vs LOAD
(500kHz)
7 V_IN SKIP MODE
7 V_IN PWM MODE
7 V_IN ULTRA SKIP MODE
12 V_IN SKIP MODE
3.5
12 V_IN PWM MODE
12 V_IN ULTRA SKIP MODE
25 V_IN SKIP MODE
25 V_IN PWM MODE
25 V_IN ULTRA SKIP MODE
3.0
2.5
2.0
1.5
1.0
0.5
0
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 12. V_OUT1 = 5V POWER DISSIPATION vs LOAD
(400kHz)
1.064
1.062
NO LOAD PWM
1.060
1.058
1.056
1.054
MID LOAD PWM
1.052
1.050
MAX LOAD PWM
1.048
5 7 9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 13. V_OUT2 = 1.05V OUTPUT VOLTAGE REGULATION
vs V_IN (PWM MODE)
1.068
1.066
1.064
1.062
NO LOAD PWM
1.060
1.058
1.056
1.054
1.052
MID LOAD PWM
1.050
1.048
5
MMAAXX LLOOAADDPPWWMM
7 9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 14. V_OUT2 = 1.05V OUTPUT VOLTAGE REGULATION
vs V_IN (SKIP MODE)
10
FN6418.4
March 18, 2008