ISL6227 Datasheet, PDF (5/27 Pages) Intersil Corporation – Dual Mobile-Friendly PWM Controller with DDR Option

ISL6227
Typical Operation Performance
100
EFF@ 5V
90
EFF@ 12V
80
70 _{EFF@ 5V, PWM}
60
50
EFF@ 19.5V
EFF@ 12V, PWM
40
30
20
EFF@ 19.5V, PWM
10
0
0.01
0.10
1.00
10.0
LOAD CURRENT (A)
FIGURE 1. EFFICIENCY OF CHANNEL 1, 2.5V,
HYS/PWM MODE
100
EFF@ 12V
90
80
70
EFF@ 5V
60
EFF@ 19.5V
EFF@ 19.5V, PWM
50
EFF@ 12V, PWM
40
EFF@ 5V, PWM
30
20
10
0
0.01
0.10
1.00
10.0
LOAD CURRENT (A)
FIGURE 2. EFFICIENCY OF CHANNEL 2, 1.8V,
HYS/PWM MODE
2.54
2.53
V_OUT @ 19.5V
2.52
2.51
2.50
V_OUT @ 12V
V_OUT @ 19.5V, PWM
2.49
2.48
2.47
0
V_OUT @ 5V, PWM
V_OUT @ 5V
V_OUT @ 12V, PWM
1
2
3
4
5
LOAD CURRENT (A)
FIGURE 3. OUTPUT VOLTAGE OF CHANNEL 1 vs LOAD
308
306
304
302
300
298
296
294
292
290
288
286
-20
0
75% QUANTILE
FREQUENCY MEAN
25% QUANTILE
20
40
60
80
TEMPERATURE (°C)
100 120
FIGURE 5. SWITCHING FREQUENCY OVER-TEMPERATURE
5
1.83
V_OUT @ 19.5V
1.82
V_OUT @ 12V
1.81
1.80
V_OUT @ 12V, PWM
V_OUT @ 19.5V, PWM
1.79
V_OUT @ 5V, PWM
V_OUT @ 5V
1.78
0
1
2
3
4
5
LOAD CURRENT (A)
FIGURE 4. OUTPUT VOLTAGE OF CHANNEL 2 vs LOAD
0.9025
0.9020
0.9015
0.9010
0.9005
0.9000
0.8995
0.8990
0.8985
75% QUANTILE
VREF MEAN
25% QUANTILE
0.8980
0.8975
-20
0
20
40
60
80
TEMPERATURE (°C)
100 120
FIGURE 6. REFERENCE VOLTAGE ACCURACY
OVER-TEMPERATURE
FN9094.7
May 4, 2009