5V or Adjustable, Low-Voltage,
Step-Up DC-DC Controller
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
HEAVY-LOAD SWITCHING WAVEFORMS
(V
OUT
= 12V)
V
OUT
A
0V
I
LIM
B
0A
C
C
B
0A
A
MAX608
MEDIUM-LOAD SWITCHING WAVEFORMS
(V
OUT
= 12V)
V
OUT
0V
I
LIM
2µs/div
V
IN
= 4V, I
OUT
= 490mA, V
OUT
= 12V
A = EXT VOLTAGE, 10V/div
B = INDUCTOR CURRENT, 1A/div
C = V
OUT
RIPPLE, 50mV/div, AC-COUPLED
10µs/div
V
IN
= 4V, I
OUT
= 300mA, V
OUT
= 12V
A = EXT VOLTAGE, 10V/div
B = INDUCTOR CURRENT, 1A/div
C = V
OUT
RIPPLE, 50mV/div, AC-COUPLED
LINE-TRANSIENT RESPONSE
(V
OUT
= 5V)
LOAD-TRANSIENT RESPONSE
(V
OUT
= 5V)
A
4.0V
2.7V
500mA
A
0A
B
B
5ms/div
I
OUT
= 500mA, V
OUT
= 5V
A = V
IN
, 2.7V TO 4.0V, 1V/div
B = V
OUT
RIPPLE, 100mV/div, AC-COUPLED
2ms/div
V
IN
= 2V, V
OUT
= 5V
A = LOAD CURRENT, 0mA TO 500mA, 500mA/div
B = V
OUT
RIPPLE, 50mV/div, AC-COUPLED
EXITING SHUTDOWN
A
0V
5V
B
0V
200µs/div
I
OUT
= 500mA, V
IN
= 3.5V
A = SHDN, 2V/div
B = V
OUT
, 2V/div
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
