MAX783C/D Просмотр технического описания (PDF) - Maxim Integrated

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MAX783C/D

Triple-Output Power-Supply Controller for Notebook Computers

Maxim Integrated 

Triple-Output Power-Supply Controller

for Notebook Computers

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 1, Transpower TTI5902 transformer, TA = +25°C, unless otherwise noted.)

SHUTDOWN SUPPLY CURRENT vs.

SUPPLY VOLTAGE

500

400

300

SHDN = 0V

200

100

0

0

6

12

18

24

30

SUPPLY VOLTAGE (V)

MINIMUM VIN TO VOUT DIFFERENTIAL

vs. +5V OUTPUT CURRENT

1.0

0.8

300kHz

0.6

0.4

0.2

0

1m

200kHz

+5V OUTPUT

STILL REGULATING

10m

100m

1

10

+5V OUTPUT CURRENT (A)

SWITCHING FREQUENCY vs.

LOAD CURRENT

1000

SYNC = REF (300kHz)

ON3 = ON5 = HIGH

100

+5V, VIN = 7.5V

10 +5V, VIN = 30V

1

+3.3V, VIN = 7.5V

0.1

100µ

1m

10m

100m

1

LOAD CURRENT (A)

PULSE-WIDTH MODULATION MODE WAVEFORMS

LX VOLTAGE

10V/div

ILOAD = 1A

VIN = 16V

500ns/div

+5V OUTPUT

VOLTAGE

50mV/div

IDLE-MODE WAVEFORMS

+5V OUTPUT

50mV/div

2V/div

ILOAD = 100mA

VIN = 10V

200µs/div

_______________________________________________________________________________________ 5

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