Rainbow-electronics MAX8884Z Manual de usuario Pagina 5

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MAX8884Y/MAX8884Z
700mA DC-DC Step-Down Converters
with Dual 300mA LDO in 2mm x 2mm CSP
_______________________________________________________________________________________
5
MAX8884Z STEP-DOWN CONVERTER
LINE TRANSIENT RESPONSE
MAX8884Y/Z toc12
10μs/div
I
LX
V
IN
V
OUT
0A
1V/div
200mA/div
AC-COUPLED
20mV/div
I
LOAD
= 500mA
4V 4V
3.5V
MAX8884Y STEP-DOWN CONVERTER
LOAD TRANSIENT
MAX8884Y/Z toc14
20μs/div
I
LX
V
OUT
I
OUT
0A
1.8V DC OFFSET
100mV/div
500mA/div
500mA/div
0A
500mA
10mA 10mA
_______________________________________________________________________________________ 5
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.)
MAX8884Y STEP-DOWN CONVERTER
LINE TRANSIENT RESPONSE
MAX8884Y/Z toc11
10
μ
s/div
I
LX
V
IN
V
OUT
0A
1V/div
200mA/div
AC-COUPLED
20mV/div
I
LOAD
= 500mA
3.5V
4V 4V
MAX8884Z STEP-DOWN CONVERTER
LOAD TRANSIENT
MAX8884Y/Z toc13
20μs/div
V
OUT
I
LX
I
OUT
0A
500mA/div
0A
500mA/div
1.8V DC OFFSET
100mV/div
10mA10mA
500mA
MAX8884Y STEP-DOWN CONVERTER
SOFT-START WAVEFORMS
MAX8884Y/Z toc10
40
μ
s/div
I
LX
I
IN1
V
OUT
V
BUCK_EN
0A
2V/div
500mA/div
0A
200mA/div
0V
1V/div
0V
I
LOAD
= 500mA
MAX8884Z STEP-DOWN CONVERTER
SOFT-START WAVEFORMS
MAX8884Y/Z toc09
40μs/div
I
IN1
V
OUT
I
LX
V
BUCK_EN
0A
2V/div
500mA/div
0A
200mA/div
0V
1V/div
0V
I
LOAD
= 500mA
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