Rainbow-electronics MAX742 Manuel d'utilisateur télécharger pdf (Page 5)

MAX742

Switch-Mode Regulator with

+5V to ±12V or ±15V Dual Output

_______________________________________________________________________________________ 5

A = GATE DRIVE, 5V/div

B = SWITCH VOLTAGE, 10V/div

C = SWITCH CURRENT, 0.2A/div

SWITCHING WAVEFORMS,

INVERTING SECTION

A

B

C

2µs/div

_____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 2, I

LOAD

= 100mA, unless otherwise noted.)

A = GATE DRIVE, 5V/div

B = SWITCH VOLTAGE, 10V/div

C = SWITCH CURRENT, 0.2A/div

SWITCHING WAVEFORMS,

STEP-UP SECTION

A

B

C

2µs/div

A = NOISE WITH i FILTER, 1mV/div

B = NOISE WITHOUT FILTER, 20mV/div

MEASURED AT -V

OUT

V+ = 5V

BW = 5MHz

OUTPUT-VOLTAGE NOISE,

FILTERED AND UNFILTERED

A

B

2µs/div

A = +VO, 20mV/div

B = -VO, 50mV/div



LOAD-TRANSIENT RESPONSE

A

B

200µs/div

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

Switch-Mode Regulator with 1

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