Rainbow-electronics MAX1802 Manual do Utilizador descarregar pdf (Página 10)

1.247

1.249

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1.250

1.252

1.253

0 10050 150 200 250

MAX1802 toc10

REFERENCE CURRENT (

REFERENCE VOLTAGE (V)

REFERENCE VOLTAGE

vs. REFERENCE CURRENT

110010 1000 10,000

MAX1802 toc11

FREQUENCY (kHz)

SMALL-SIGNAL RESPONSE (dB)

FB_ TO COMP_ SMALL-SIGNAL

OPEN-LOOP FREQUENCY RESPONSE

MAX1802

Digital Camera Step-Down

Power Supply

10 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 1, V

VDDM

= 6V, V

VDDC

= 3.3V, V

ONM

= 3V, V

ONC

= V

ON1

= V

DCON2

= V

DCON3

= 0, T

= +25°C, unless otherwise

noted.)

1ms/div

MAIN OUTPUT STARTUP RESPONSE

MAX1802 toc12

ONM

5V/div

MAIN

2V/div

OUT

200mA/div

1ms/div

CORE OUTPUT STARTUP RESPONSE

MAX1802 toc13

ONC

5V/div

CORE

2V/div

OUT

100mA/div

1ms/div

AUXILIARY CONTROLLER

STARTUP RESPONSE

MAX1802 toc14

5V/div

OUT

2V/div

OUT

200mA/div

1.240

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1.250

1.255

1.260

MAX1802 toc09

TEMPERATURE (

REFERENCE VOLTAGE (V)

-40 20 40-20 0 60 80

REFERENCE VOLTAGE

vs. TEMPERATURE

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 27 28

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