MAX8834Y/MAX8834Z
Adaptive Step-Up Converters
with 1.5A Flash Driver
8
Maxim Integrated
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 3.6V, V
OUT
= 3.8V, V
DD
= 3.0V, T
A
= +25°C, unless otherwise noted.)
400
s/div
SHUTDOWN WAVEFORM
(MAX8834Z, ADAPTIVE MODE)
V
OUT
V
LX
500mA/div
2V/div
1V/div
2V/div
I
LX
V
COMP
MAX8834Y/Z toc18
ADAPTIVE MODE
I
LED1
= 31.25mA
400ns/div
LIGHT-LOAD SWITCHING WAVEFORMS
(MAX8834Y)
V
LX
200mA/div
0mA
2V/div
20mV/div
0V
I
LX
V
OUT
AC RIPPLE
V
OUT
= 5V
I
OUT
= 16mA
MAX8834Y/Z toc19
400ns/div
LIGHT-LOAD SWITCHING WAVEFORMS
(MAX8834Z)
V
LX
200mA/div
0mA
2V/div
20mV/div
0V
I
LX
V
OUT
AC RIPPLE
V
OUT
= 5V
I
OUT
= 16mA
MAX8834Y/Z toc20
400
s/div
SHUTDOWN WAVEFORM
(MAX8834Z, V
OUT
= 5V)
V
OUT
V
LX
500mA/div
2V/div
1V/div
2V/div
I
LX
V
COMP
MAX8834Y/Z toc17
5V
V
OUT
= 5V
I
LED1
= 31.25mA
400µs/div
SHUTDOWN WAVEFORM
(MAX8834Y, V
OUT
= 5V)
V
OUT
V
LX
500mA/div
2V/div
1V/div
2V/div
I
LX
V
COMP
MAX8834Y/Z toc15
5V
V
OUT
= 5V
I
LED1
= 31.25mA
400
s/div
SHUTDOWN WAVEFORM
(MAX8834Y, ADAPTIVE MODE)
V
OUT
V
LX
500mA/div
2V/div
1V/div
2V/div
I
LX
V
COMP
MAX8834Y/Z toc16
ADAPTIVE MODE
I
LED1
= 31.25mA