Rainbow-electronics MAX1791 Manual do Utilizador descarregar pdf (Página 7)

MAX1762/MAX1791

High-Efficiency, 10-Pin µMAX, Step-Down

Controllers for Notebooks

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

= +25°C, unless otherwise noted.)

LOAD-TRANSIENT RESPONSE

MAX1762/91 toc12

OUT

AC-COUPLED

100mV/div

2A/div

100

s/div

= 12V, I

= 0 TO 2A, V

OUT

= 2.5V

LOAD-TRANSIENT RESPONSE

MAX1762/91 toc13

OUT

AC-COUPLED

100mV/div

LOAD

2A/div

100

s/div

= 12V, I

LOAD

= 0 TO 2A, V

OUT

= 1.8V

LINE-TRANSIENT RESPONSE

MAX1762/91 toc11

1V/div

OUT

AC-COUPLED

20mV/div

100

s/div

= 7.5V TO 8V, I

LOAD

= 0, V

OUT

= 2.5V

SHUTDOWN AND STARTUP WAVEFORMS

= 300mA)

MAX1762/91 toc15

OUT

2V/div

1A/div

SHDN

5V/div

2ms/div

= 8V, I

LOAD

= 300mA, V

OUT

= 2.5V

SHUTDOWN AND STARTUP WAVEFORMS

= 2.5A)

MAX1762/91 toc16

2A/div

SHDN

5V/div

OUT

2V/div

2ms/div

= 8V, I

LOAD

= 2.5A, V

OUT

= 2.5V

OUTPUT OVERLOAD WAVEFORMS

MAX1762/91 toc14

100µs/div

= 12V, I

LOAD

= 0 TO 3A, V

OUT

= 2.5V

OUT

AC-COUPLED

LOAD

2A/div

4.0

4.6

4.4

4.2

4.8

5.0

5.2

5.4

5.6

5.8

6.0

51181417

SUPPLY CURRENT vs. INPUT VOLTAGE

(SHUTDOWN)

MAX1762/91 toc10

VP (V)

SUPPLY CURRENT (µA)

NO LOAD

100

200

150

250

300

51181417

SUPPLY CURRENT vs. INPUT VOLTAGE

MAX1762/91 toc09

VP (V)

SUPPLY CURRENT (µA)

OUT

= 3.3V

NO LOAD

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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