Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
Typical Operating Characteristics (continued)
(L = 22µH, C = 47µF, C
= 47µF, T = +25°C, unless otherwise noted.)
A
IN
OUT
LINE-TRANSIENT RESPONSE
LIGHT-LOAD SWITCHING WAVEFORMS
MAX1795/96/97 toc18
MAX1795/96/97 toc17
V
LX
5V/div
V
BATT
+2.7V TO +3V
I
INDUCTOR
500mA/div
V
OUT
V
OUT
(AC-COUPLED)
(AC-COUPLED)
20mV/div
100mV/div
10µs/div
= +2.7V TO +3V
20µs/div
V
V
V
= +3.6V
= +5.0V
= 40mA
BATT
OUT
NO LOAD
BATT
OUT
= +5.0V
V
I
LOAD
LOAD-TRANSIENT RESPONSE
STARTUP-SHUTDOWN WAVEFORMS
MAX1795/96/97 toc19
MAX1795/96/97 toc20
V
SHDN
5V/div
I
OUT
100mA/div
V
OUT
2V/div
V
OUT
100mV/div
I
INDUCTOR
500mA/div
40µs/div
2ms/div
= +2.4V
V
V
I
= +2.4V
V
V
I
BATT
OUT
LOAD
BATT
= +3.3V
= +5.0V
OUT
= 0 TO 325mA
= 200mA
LOAD
_______________________________________________________________________________________
7
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
