Data Sheet

ISL85410
10
FN8375.5
July 24, 2014
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FIGURE 17. V
OUT
REGULATION vs LOAD, PWM, V
OUT
= 1.8V FIGURE 18. V
OUT
REGULATION vs LOAD, PFM, V
OUT
= 1.8V
Efficiency Curves f
SW
= 500kHz, T
A
= +25°C (Continued)
1.800
1.801
1.802
1.803
1.804
1.805
1.806
1.807
1.808
1.809
1.810
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
V
IN
= 5V
V
IN
= 15V
V
IN
= 24V
V
IN
= 33V
V
IN
= 12V
OUTPUT LOAD (A)
OUTPUT VOLTAGE (V)
1.800
1.802
1.804
1.806
1.808
1.810
1.812
1.814
1.816
1.818
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
OUTPUT VOLTAGE (V)
V
IN
= 5V
V
IN
= 15V
V
IN
= 24V V
IN
= 33V
V
IN
= 12V
Measurements f
SW
= 500kHz, V
IN
= 24V, V
OUT
= 3.3V, T
A
= +25°C
FIGURE 19. START-UP AT NO LOAD, PFM FIGURE 20. START-UP AT NO LOAD, PWM
FIGURE 21. SHUTDOWN AT NO LOAD, PFM
FIGURE 22. SHUTDOWN AT NO LOAD, PWM
LX 20V/DIV
V
OUT
2V/DIV
EN 20V/DIV
PG 2V/DIV
5ms/DIV
LX 20V/DIV
V
OUT
2V/DIV
EN 20V/DIV
PG 2V/DIV
5ms/DIV
LX 20V/DIV
V
OUT
2V/DIV
EN 20V/DIV
PG 2V/DIV
100ms/DIV
LX 20V/DIV
V
OUT
2V/DIV
EN 20V/DIV
PG 2V/DIV
100ms/DIV