Typical operating characteristics (continued) – Rainbow Electronics MAX8640Z User Manual
Page 4
MAX8640Y/MAX8640Z
500mA, 4MHz/2MHz Synchronous
Step-Down DC-DC Converters in SC70
4
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
IN
= 3.6V, V
OUT
= 1.5V, MAX8640Z, L = Murata LQH32CN series, T
A
= +25°C, unless otherwise noted.)
I
LX
I
IN
V
SHDN
V
OUT
100mA/div
500mA/div
1V/div
0V
0mA
0mA
5V/div
20
μs/div
LIGHT-LOAD STARTUP WAVEFORM
(100
Ω LOAD)
MAX8640Y/Z toc08
I
LX
I
IN
V
SHDN
V
OUT
100mA/div
500mA/div
1V/div
0V
0mA
0mA
5V/div
20
μs/div
HEAVY-LOAD STARTUP WAVEFORM
(5
Ω LOAD)
MAX8640Y/Z toc09
I
LX
V
OUT
V
IN
20mV/div
AC-COUPLED
200mA/div
0mA
1V/div
4V
20
μs/div
LINE-TRANSIENT RESPONSE
(4V TO 3.5V TO 4V)
MAX8640Y/Z toc10
I
OUT
V
OUT
I
LX
500mA/div
50m/div
AC-COUPLED
200mA/div
0mA
40
μs/div
LOAD-TRANSIENT RESPONSE
(5mA TO 250mA TO 5mA)
MAX8640Y/Z toc11
I
OUT
V
OUT
I
LX
500mA/div
100mV/div
AC-COUPLED
200mA/div
0V
40
μs/div
LOAD-TRANSIENT RESPONSE
(10mA TO 500mA TO 10mA)
MAX8640Y/Z toc12