Datasheet

ADP5020
Rev. 0 | Page 12 of 28
V
IN
= 4.5 V, V
OUT1
= 2.8 V, V
OUT2
= V
OUT3
= 1.8 V, I
OUT
= 100 mA, C
4
= C
1
= 10 μF, C
2
=4.7 μF, C
3
= 1 μF, T
J
= 25°C, unless otherwise noted.
07774-028
LDO
LDO OUTPUT = 1V/DIV
TIME = 50µs/DIV
Figure 18. LDO Startup
07774-029
SW1
BUCK 1
BUCK 1 OUTPUT = 20mV/DIV
SW1 = 5V/DIV
TIME = 100ns/DIV
Figure 19. Buck 1 Switching Node Voltage and
Output Ripple Voltage
07774-030
SW2
BUCK 2
BUCK 2 OUTPUT = 20mV/DIV
SW2 = 5V/DIV
TIME = 100ns/DIV
Figure 20. Buck 2 Switching Node Voltage and
Output Ripple Voltage
07774-031
BUCK 1
LDO
BUCK 2
ENABLE
BUCK 1 OUTPUT = 2V/DIV
BUCK 2 OUTPUT = 1V/DIV
LDO OUTPUT = 1V/DIV
ENABLE OUTPUT = 2V/DIV
TIME = 5ms/DIV
Figure 21. Three Regulators Turned Off by Sequencer