Rainbow-electronics MAX8884Z Manual do Utilizador descarregar pdf (Página 7)

MAX8884Y/MAX8884Z

700mA DC-DC Step-Down Converters

with Dual 300mA LDO in 2mm x 2mm CSP

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7_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

= V

IN1A

= V

IN1B

= V

IN2

= 3.6V, V

BUCK

= 1.2V, V

LDO1

= 1.8V, V

LDO2

= 2.8V, MAX8884YEVKIT, T

= +25°C, unless otherwise noted.)

LDO1, LDO2 LOAD TRANSIENT RESPONSE

MAX8884Y/Z toc24

20μs/div

LDO1

LDO2

LDO1

AC-COUPLED

10mV/div

AC-COUPLED

10mV/div

50mA/div

1mA 1mA

40mA

LDO1, LDO2 LINE TRANSIENT

MAX8884Y/Z toc23

10μs/div

LDO1

LDO2

AC-COUPLED

5mV/div

AC-COUPLED

5mV/div

1V/div

LDO1

= I

LDO2

= 100mA

4V 4V

3.5V

LDO OUTPUT-NOISE SPECTRAL DENSITY

vs. FREQUENCY, V

LDO_

= 2.8V

MAX884Y/Z toc22

FREQUENCY (kHz)

1001010.1

100

1000

10,000

0.01 1000

LDO_

= 30mA

NOISE DENSITY (nV√(Hz))

LDO OUTPUT-NOISE SPECTRAL DENSITY

vs. FREQUENCY, V

LDO_

= 1.8V

MAX884Y/Z toc21

FREQUENCY (kHz)

NOISE DENSITY (nV√(Hz))

1001010.1

100

1000

10,000

0.01 1000

LDO_

= 30mA

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

MAX8884Y/MAX8884Z 1

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