Datasheet

ADP2370/ADP2371 Data Sheet
Rev. C | Page 12 of 32
40
45
50
55
60
65
70
75
80
85
90
0.01
0.1
1
10
100
1000
EFFICIENCY (%)
LOAD (mA)
600kHz
1.2MHz
09531-027
Figure 27. Efficiency vs. Load Current, Different Switching Frequency,
V
OUT
= 1.8 V, V
IN
= 9 V
CH1 500mA Ω
B
W
CH3 1.00V
B
W
CH2 20.0mV
B
W
M10.0µs A CH3 4.56V
1
2
3
T
11.00%
V
OUT
V
IN
09531-028
INDUCTOR CURRENT
Figure 28. Line Transient, V
OUT
= 1.8 V, PSM Mode, 100 mA, V
IN1
= 4 V to 5 V,
2 μs Rise Time, C
IN
= 3.3 μF
M10.0µs A CH3 4.64V
1
T 11.20%
V
OUT
V
IN
INDUCTOR CURRENT
09531-029
CH1 200mA Ω
B
W
CH3 1.00V
B
W
CH2 20.0mV
B
W
Figure 29. Line Transient, V
OUT
= 1.8 V, PWM Mode, 800 mA, V
IN1
= 4 V to 5 V,
2 μs Rise Time, C
IN
= 3.3 μF
M10.0µs A CH3 4.56V
2
1
3
T 11.0%
V
OUT
V
IN
INDUCTOR CURRENT
09531-030
CH1 500mA Ω
B
W
CH3 1.00V
B
W
CH2 20.0mV
B
W
Figure 30. Line Transient, V
OUT
= 1.2 V, PSM Mode, 100 mA, V
IN1
= 4 V to 5 V,
2 μs Rise Time, C
IN
= 3.3 μF
M10.0µs A CH3 5.44V
1
2
3
T 10.80%
V
OUT
V
IN
INDUCTOR CURRENT
09531-031
CH1 500mA Ω
B
W
CH3 1.00V
B
W
CH2 10.0mV
B
W
Figure 31. Line Transient, V
OUT
= 1.2 V, PWM Mode, 800 mA, V
IN1
= 4 V to 5 V,
2 μs Rise Time, C
IN
= 3.3 μF
M10.0µs A CH3 6.78V
1
2
3
T 11.40%
V
OUT
V
IN
INDUCTOR CURRENT
09531-032
CH1 200mA Ω
B
W
CH3 1.00V
B
W
CH2 20.0mV
B
W
Figure 32. Line Transient, V
OUT
= 3.3 V, PSM Mode, 100 mA, V
IN1
= 6 V to 7 V,
2 μs Rise Time, C
IN
= 3.3 μF