Datasheet

ADP2125
Rev. A | Page 8 of 16
2.1 5.14.64.13.63.12.6
350
300
250
200
150
100
P-CHANNEL
R
DSON
(mΩ)
INPUT VOLTAGE (V)
T
A
= –40°C
T
A
= +25°C
T
A
= +85°C
I
SW
= 500mA
08774-110
Figure 10. PMOS Drain-to-Source On Resistance
2.1 5.14.64.13.63.12.6
450
400
350
300
250
200
150
N-CHANNEL R
DSON
(mΩ)
INPUT VOLTAGE (V)
T
A
= –40°C
T
A
= +25°C
T
A
= +85°C
I
SW
= 500mA
08774-111
Figure 11. NMOS Drain-to-Source On Resistance
2.1 5.14.64.13.63.12.6
6.0
5.8
5.6
5.4
5.2
5.0
FREQUENCY (MHz)
INPUT VOLTAGE (V)
T
A
= –40°C
T
A
= +25°C
T
A
= +85°C
08774-112
Figure 12. Switching Frequency vs. Input Voltage
1
2
LOAD CURRENT (200mA/DIV)
TIME (20µs/DIV)
OUTPUT VOLTAGE (20mV/DIV)
1.26V OFFSET
V
IN
= 2.1V
V
OUT
= 1.26V
08774-113
Figure 13. Load Transient Response, 250 mA to 420 mA, V
IN
= 2.1 V
1
2
LOAD CURRENT (200mA/DIV)
TIME (20µs/DIV)
OUTPUT VOLTAGE (50mV/DIV)
1.26V OFFSET
V
IN
= 3.6V
V
OUT
= 1.26V
08774-114
Figure 14. Load Transient Response, 250 mA to 420 mA, V
IN
= 3.6 V
1
2
LOAD CURRENT (200mA/DIV)
TIME (20µs/DIV)
OUTPUT VOLTAGE (50mV/DIV)
1.26V OFFSET
V
IN
= 5.5V
V
OUT
= 1.26V
08774-115
Figure 15. Load Transient Response, 250 mA to 420 mA, V
IN
= 5.5 V