Rainbow-electronics MAX8742 Instrukcja Użytkownika Pobierz pdf (Strona 8)

5V LOAD-TRANSIENT RESPONSE

MAX8741/42 toc11

10V

LX5

5A/div

LX5

10V/div

5V OUTPUT

5OmV/div

AC-COUPLED

20µs/div

= 8V, I

OUT

= 1A TO 5A

3.3V LOAD-TRANSIENT RESPONSE

MAX8741/42 toc12

10V

LX3

5A/div

LX3

10V/div

3.3V OUTPUT

5OmV/div

AC-COUPLED

20µs/div

= 8V, I

OUT

= 1A TO 5A

SHUTDOWN WAVEFORMS

MAX8741/42 toc14

3.3V

5V OUTPUT

2V/div

3.3V OUTPUT

2V/div

DL3

5V/div

DL5

5V/div

SHDN

5V/div

500µs/div

LOAD3

= 5Ω, R

LOAD5

= 5Ω

STARTUP WAVEFORMS

MAX8741/42 toc13

3.3V OUTPUT

2V/div

5V OUTPUT

5V/div

TIME

2V/div

RUN

5V/div

2ms/div

SEQ = V

, O.O1µF CAPACITOR ON-TIME

MAX8741/MAX8742

500kHz Multi-Output Power-Supply Controllers

with High Impedance in Shutdown

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 1, Table 1, 6A/500kHz components, T

= +25°C, unless otherwise noted.)

2.505

2.500

2.495

2.490

2.485

0312 456

REF OUTPUT VOLTAGE

vs. OUTPUT CURRENT

MAX8741/42 toc10

OUTPUT CURRENT (mA)

REF OUTPUT VOLTAGE (V)

= 15V

ON3 = ON5 = 0

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 32 33

MAX8741/MAX8742 1

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