Rainbow-electronics MAX1797 Bedienungsanleitung PDF herunterladen (Seite 7)

MAX1795/MAX1796/MAX1797

Low Supply Current, Step-Up DC-DC Converters

with True-Shutdown

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(L = 22µH, C

= 47µF, C

OUT

= 47µF, T

= +25°C, unless otherwise noted.)

20µs/div

LIGHT-LOAD SWITCHING WAVEFORMS

MAX1795/96/97 toc17

5V/div

INDUCTOR

500mA/div

OUT

(AC-COUPLED)

100mV/div

BATT

= +3.6V

OUT

= +5.0V

LOAD

= 40mA

10µs/div

LINE-TRANSIENT RESPONSE

MAX1795/96/97 toc18

BATT

+2.7V TO +3V

OUT

(AC-COUPLED)

20mV/div

BATT

= +2.7V TO +3V

OUT

= +5.0V

NO LOAD

LOAD-TRANSIENT RESPONSE

MAX1795/96/97 toc19

OUT

100mA/div

OUT

100mV/div

40µs/div

BATT

= +2.4V

OUT

= +3.3V

LOAD

= 0 TO 325mA

STARTUP-SHUTDOWN WAVEFORMS

MAX1795/96/97 toc20

SHDN

5V/div

INDUCTOR

500mA/div

OUT

2V/div

2ms/div

BATT

= +2.4V

OUT

= +5.0V

LOAD

= 200mA

1 2 3 4 5 6 7 8 9 10 11 12 13

MAX1795/MAX1796/MAX1797 1

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