Datasheet

ADP2138/ADP2139 Data Sheet
Rev. C | Page 10 of 20
09496-023
CH1 1.00V Ω
CH4 5.00V
CH2 500mA Ω M 40.0µs A CH3 2.50V
T 10.40%
CH3 5.00V
T
4
1
1
1
3
2
SW
V
OUT
I
IN
E
N
Figure 27. Startup, V
OUT
= 0.8 V, I
OUT
= 10 mA
09496-024
CH1 5.00V Ω
CH4 5.00V
CH2 500mA Ω M 40.0µs A CH3 2.50V
T 10.40%
CH3 5.00V
T
4
1
1
1
3
2
SW
V
OUT
I
IN
E
N
Figure 28. Startup, V
OUT
= 3.3 V, I
OUT
= 10 mA
09496-025
T
4
4
1
1
2
A CH1 3.80mVM 1.00µs
T
50.00%
CH1 10.0mVΩ
CH4 2.00V
CH2 500mA Ω
SW
V
OUT
I
L
Figure 29. Typical Waveform, V
OUT
= 1.8 V, PSM Mode, I
OUT
= 10 mA
09496-026
T
4
1
1
2
A CH4 1.32VM 40.0µs
T 50.00%
CH1 10.0mVΩ
CH2 500mA Ω
CH4 2.00V
SW
V
OUT
I
L
Figure 30. Typical Waveform, V
OUT
= 1.8 V, PWM Mode, I
OUT
= 200 mA
09496-035
CH1 100mV
CH4 2.00V
M 40.0µs A CH3 1.36V
T 29.60%
CH3 2.00V
T
4
1
1
1
3
SW
MODE
V
OUT
Figure 31. Mode Transition from PSM to PWM to PSM, V
OUT
= 1.8 V
130
120
100
110
90
80
70
60
50
40
30
20
10
0
0.001 0.01 0.1 1
I
OUT
(A)
V
OUT
RIPPLE (mV)
09496-100
1.8V, V
IN
= 5.5V, AUTO
1.8V, V
IN
= 3.6V, AUTO
1.8V, V
IN
= 2.3V, AUTO
1.8V, V
IN
= 5.5V, PWM
1.8V, V
IN
= 3.6V, PWM
1.8V, V
IN
= 2.3V, PWM
Figure 32. V
OUT
Peak-to-Peak Ripple vs. Output Current, V
OUT
= 1.8 V