Rainbow-electronics MAX8548 Manual do Utilizador descarregar pdf (Página 5)

MAX8545/MAX8546/MAX8548

Low-Cost, Wide Input Range, Step-Down

Controllers with Foldback Current Limit

_______________________________________________________________________________________ 5

CHANGE IN OUTPUT VOLTAGE

vs. INPUT VOLTAGE

MAX8545/46/48 toc10

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

4.54.03.53.0

1.79

1.80

1.81

1.82

1.83

1.84

1.78

2.5

LOAD

= 6V

CHANGE IN OUTPUT VOLTAGE

vs. INPUT VOLTAGE

MAX8545/46/48 toc11

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

18 20 22 24161412

2.49

2.50

2.51

2.52

2.48

LOAD

= 6V

FREQUENCY vs. INPUT VOLTAGE

MAX8545/46/48 toc12

INPUT VOLTAGE (V)

FREQUENCY (kHz)

22.9417.8812.827.76

294

298

302

306

310

290

2.70 28.00

OUT

= 2.5V

NO LOAD

MAX8545/

MAX8546

FREQUENCY vs. TEMPERATURE

MAX8545/46/48 toc13

TEMPERATURE (

FREQUENCY (kHz)

60.0035.0010.00-15.00

294

298

302

306

310

290

-40.00 85.00

= 12V

OUT

= 2.5V

NO LOAD

MAX8545/

MAX8546

OUT

AC COUPLED

100mV/div

OUT

5A/div

40µs/div

LOAD TRANSIENT RESPONSE

MAX8545 toc14

= 17V

OUT

= 2.5V

Typical Operating Characteristics (continued)

= V

= 5V, typical values are at T

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10 ... 17 18

MAX8545/MAX8546/MAX8548 1

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