Rainbow Electronics MAX8884Z - Manual (Page 8)

MAX8884Y/MAX8884Z
700mA DC-DC Step-Down Converters
with Dual 300mA LDO in 2mm x 2mm CSP
8 _______________________________________________________________________________________
REFBP SOFT-START
C REFBP = 0.15 μF
MAX8884Y/Z toc28
100 μs/div
V LDO1_EN
V REFBP
V LDO1
1V/div
0V
2V/div
0V
1V/div
0V
REFBP SOFT-START
C REFBP = 0.033 μ F
MAX8884Y/Z toc27
100 μ s/div
V LDO1_EN
V REFBP
V LDO1
1V/div
0V
2V/div
0V
0V
1V/div
LDO1, LDO2 STARTUP
AND SHUTDOWN RESPONSE
MAX8884Y/Z toc26
400 μs/div
V LDO1
V LDO1_EN =
V LDO2_EN
V LDO2 2V/div
0V
2V/div
0V
2V/div
0V
LDO1, LDO2 LOAD TRANSIENT
RESPONSE NEAR DROPOUT
MAX8884Y/Z toc25
20 μs/div
I
LDO1
V LDO2
I LDO2
V LDO1
AC-COUPLED
10mV/div
AC-COUPLED
10mV/div
50mA/div
50mA/div
1mA 1mA
40mA
1mA 1mA
40mA
V IN2 = V LDO2 + 200mV
Typical Operating Characteristics (continued)
(V IN = V IN1A = V IN1B = V IN2 = 3.6V, V BUCK = 1.2V, V LDO1 = 1.8V, V LDO2 = 2.8V, MAX8884YEVKIT, T A = +25°C, unless otherwise noted.)