Datasheet

Data Sheet ADP2126/ADP2127
Rev. B | Page 7 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 3.6 V, f
EXTCLK
= 10 MHz, V
OUT
= 1.20 V, L = 1.0 µH (CKP1608S1R0), C
IN
= 2.2 µF (GRM153R60J225ME95), C
OUT
= 2.2 µF
(GRM153R60G225M), and T
A
= 25°C, unless otherwise noted.
90
0
10
20
30
40
50
60
70
80
1 10 100 1000
EFFICIENCY (%)
LOAD CURRENT (mA)
V
IN
= 2.1V
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
AUTO MODE
PWM MODE
09658-006
Figure 5. Efficiency vs. Load Current
90
30
40
50
60
70
80
2.1 5.14.64.13.63.12.6
EFFICIENCY (%)
INPUT VOLTAGE (V)
09658-007
I
LOAD
= 50mA, PWM MODE
I
LOAD
= 100mA, PWM MODE
I
LOAD
= 10mA, PFM MODE
I
LOAD
= 50mA, PFM MODE
I
LOAD
= 100mA, PFM MODE
I
LOAD
= 250mA, PFM MODE
Figure 6. Efficiency vs. Input Voltage
1.24
1.23
1.22
1.21
1.19
1.20
1 10 100 1000
OUTPUT VOLTAGE (V)
LOAD CURRENT (mA)
V
IN
= 2.1V
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
09658-008
Figure 7. Auto Mode Output Voltage Accuracy
1.205
1.204
1.203
1.202
1 10 100 1000
OUTPUT VOLTAGE (V)
LOAD CURRENT (mA)
V
IN
= 2.1V
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5.5V
09658-009
Figure 8. PWM Mode Output Voltage Accuracy
250
200
150
100
50
0
2.3 5.55.14.74.33.93.53.12.7
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
PWM OPERATION
PFM OPERATION
09658-010
Figure 9. Auto Mode Switching Threshold vs. Input Voltage
60
0
10
20
30
40
50
0 100 200 300 400 500
OUTPUT VOLTAGE RIPPLE (mV)
LOAD CURRENT (mA)
09658-011
V
IN
= 2.1V
V
IN
= 3.6V
V
IN
= 5.5V
Figure 10. Output Voltage Ripple vs. Load Current