Rainbow-electronics MAX1797 Manual de usuario Pagina 7

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MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
(L = 22µH, C
IN
= 47µF, C
OUT
= 47µF, T
A
= +25°C, unless otherwise noted.)
20µs/div
LIGHT-LOAD SWITCHING WAVEFORMS
MAX1795/96/97 toc17
V
LX
5V/div
I
INDUCTOR
500mA/div
V
OUT
(AC-COUPLED)
100mV/div
V
BATT
= +3.6V
V
OUT
= +5.0V
I
LOAD
= 40mA
10µs/div
LINE-TRANSIENT RESPONSE
MAX1795/96/97 toc18
V
BATT
+2.7V TO +3V
V
OUT
(AC-COUPLED)
20mV/div
V
BATT
= +2.7V TO +3V
V
OUT
= +5.0V
NO LOAD
LOAD-TRANSIENT RESPONSE
MAX1795/96/97 toc19
I
OUT
100mA/div
V
OUT
100mV/div
40µs/div
V
BATT
= +2.4V
V
OUT
= +3.3V
I
LOAD
= 0 TO 325mA
STARTUP-SHUTDOWN WAVEFORMS
MAX1795/96/97 toc20
V
SHDN
5V/div
I
INDUCTOR
500mA/div
V
OUT
2V/div
2ms/div
V
BATT
= +2.4V
V
OUT
= +5.0V
I
LOAD
= 200mA
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