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ISL6237 Datasheet, PDF (9/35 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers
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ISL6237
Typical Performance Curves
Circuit of Figures 62, 63 and 64, no load on LDO, OUT1, OUT2, and REF, VIN = 12V,
EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V, VEN_LDO = 5V, TA = -40°C to +100°C, unless
otherwise noted. Typical values are at TA = +25°C. (Continued)
7 VIN SKIP MODE
7 VIN PWM MODE
7 VIN ULTRA SKIP MODE
12 VIN SKIP MODE
100
12 VIN PWM MODE
12 VIN ULTRA SKIP MODE
25 VIN SKIP MODE
25 VIN PWM MODE
25 VIN ULTRA SKIP MODE
90
80
70
60
50
40
30
20
10
0
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 3. VOUT2 = 3.3V EFFICIENCY vs LOAD (500kHz)
7 VIN SKIP MODE
7 VIN PWM MODE
7 VIN ULTRA SKIP MODE
12 VIN SKIP MODE
100
12 VIN PWM MODE
12 VIN ULTRA SKIP MODE
25 VIN SKIP MODE
25 VIN PWM MODE
25 VIN ULTRA SKIP MODE
90
80
70
60
50
40
30
20
10
0
0.001
0.010
0.100
1.000
10.000
OUTPUT LOAD (A)
FIGURE 4. VOUT1 = 5V EFFICIENCY vs LOAD (400kHz)
1.070
7 VIN SKIP MODE
7 VIN PWM MODE
7 VIN ULTRA SKIP MODE
12 VIN SKIP MODE
12 VIN PWM MODE
12 VIN ULTRA SKIP MODE
25 VIN SKIP MODE
25 VIN PWM MODE
25 VIN ULTRA SKIP MODE
1.068
1.066
1.064
1.062
1.060
1.058
1.056
1.054
1.052
1.050
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 5. VOUT2 = 1.05V REGULATION vs LOAD (300kHz)
1.540
7 VIN SKIP MODE
7 VIN PWM MODE
7 VIN ULTRA SKIP MODE
12 VIN SKIP MODE
12 VIN PWM MODE
12 VIN ULTRA SKIP MODE
25 VIN SKIP MODE
25 VIN PWM MODE
25 VIN ULTRA SKIP MODE
1.535
1.530
1.525
1.520
1.515
1.510
1.505
1.500
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 6. VOUT1 = 1.5V REGULATION vs LOAD (200kHz)
7 VIN SKIP MODE
7 VIN PWM MODE
7 VIN ULTRA SKIP MODE
12 VIN SKIP MODE
3.38 12 VIN PWM MODE
12 VIN ULTRA SKIP MODE
25 VIN SKIP MODE
25 VIN PWM MODE
25 VIN ULTRA SKIP MODE
3.37
3.36
3.35
3.34
3.33
3.32
3.31
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 7. VOUT2 = 3.3V REGULATION vs LOAD (500kHz)
7 VIN SKIP MODE
7 VIN PWM MODE
7 VIN ULTRA SKIP MODE
12 VIN SKIP MODE
5.16 12 VIN PWM MODE
12 VIN ULTRA SKIP MODE
25 VIN SKIP MODE
25 VIN PWM MODE
25 VIN ULTRA SKIP MODE
5.14
5.12
5.10
5.08
5.06
5.04
5.02
5.00
0.001
0.010
0.100
OUTPUT LOAD (A)
1.000
10.000
FIGURE 8. VOUT1 = 5V REGULATION vs LOAD (400kHz)
9
FN6418.4
March 18, 2008
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