Rainbow-electronics MAX8668 Manual do Utilizador descarregar pdf (Página 7)

MAX8667/MAX8668

Typical Operating Characteristics (continued)

IN12

= V

IN34

= 3.6V, circuit of Figure 4, V

OUT1

= 1.2V, V

OUT2

= 1.8V, V

OUT3

= 2.8V, V

OUT4

= 2.8V, T

= +25°C, unless otherwise noted.)

1.5MHz Dual Step-Down DC-DC Converters

with Dual LDOs and Individual Enables

_______________________________________________________________________________________

1ms/div

OUT3 NOISE

MAX8667/88 toc25

100μV/div

OUT3

= 2.80V

LOAD

= 100Ω

1ms/div

OUT4 NOISE

MAX8667/88 toc26

100μV/div

OUT4

= 3.30V

LOAD

= 100Ω

400ns/div

OUT2 HEAVY-LOAD SWITCHING

WAVEFORMS

OUT2

LX2

20mV/div

MAX8667/88 toc23

2V/div

500mA/div

500mA LOAD

0.01 10.1 10 100 1000

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX8667/88 toc24

FREQUENCY (kHz)

PSRR (dB)

OUT3

= 2.80V

LOAD

= 100Ω

OUT3

= 4.7μF

1 2 3 4 5 6 7 8 9 10 11 12 ... 17 18

MAX8667/MAX8668 1

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Rainbow-electronics MAX8668 Manual do Utilizador Página 7

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