Datasheet

ADP2138/ADP2139 Data Sheet
Rev. C | Page 6 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 3.6 V, T
A
= 25°C, V
EN
= V
IN
, unless otherwise noted.
100
90
80
70
60
50
40
30
20
10
0
0.001 0.01 0.1 1
I
OUT
(A)
EFFICIENCY (%)
09496-003
V
IN
= 2.3V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
Figure 3. Efficiency vs. Load Current, Across Input Voltage,
V
OUT
= 1.8 V, PSM Mode
100
90
80
70
60
50
40
30
20
10
0
0.001 0.01 0.1 1
I
OUT
(A)
EFFICIENCY (%)
09496-004
V
IN
= 2.3V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
Figure 4. Efficiency vs. Load Current, Across Input Voltage,
V
OUT
= 1.8 V, PWM Mode
100
90
80
70
60
50
40
30
20
10
0
0.001 0.01 0.1 1
I
OUT
(A)
EFFICIENCY (%)
09496-005
V
IN
= 2.3V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
Figure 5. Efficiency vs. Load Current, Across Input Voltage,
V
OUT
= 0.8 V, PSM Mode
100
90
80
70
60
50
40
30
20
10
0
0.001 0.01 0.1 1
I
OUT
(A)
EFFICIENCY (%)
09496-006
V
IN
= 2.3V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
Figure 6. Efficiency vs. Load Current, Across Input Voltage,
V
OUT
= 0.8 V, PWM Mode
100
90
80
70
60
50
40
30
20
10
0
0.001 0.01 0.1 1
I
OUT
(A)
EFFICIENCY (%)
09496-007
V
IN
= 3.9V
V
IN
= 4.2V
V
IN
= 5.5V
Figure 7. Efficiency vs. Load Current, Across Input Voltage,
V
OUT
= 3.3 V, PSM Mode
100
90
80
70
60
50
40
30
20
10
0
0.001 0.01 0.1 1
I
OUT
(A)
EFFICIENCY (%)
09496-008
V
IN
= 3.9V
V
IN
= 4.2V
V
IN
= 5.5V
Figure 8. Efficiency vs. Load Current, Across Input Voltage,
V
OUT
= 3.3 V, PWM Mode