Rainbow-electronics MAX1779 Manual do Utilizador descarregar pdf (Página 7)

MAX1779

Low-Power Triple-Output TFT LCD DC-DC

Converter

_______________________________________________________________________________________ 7

100µs/div

LOAD TRANSIENT WITHOUT INTEGRATOR

(L = 10µH, 500µs PULSE)

MAX1779-16

A. V

MAIN

= 5V, 50mV/div

B. V

MAIN

= 5mA to 50mA, 25mA/div

INTG = REF, FIGURE 6

5.0V

4.9V

50mA

10µs/div

LOAD TRANSIENT WITHOUT INTEGRATOR

(L = 10µH, 5µs PULSE)

MAX1779-17

A. V

MAIN

= 5V, 100mV/div

B. I

, 200mA/div

C. I

MAIN

= 10mA to 100mA, 100mA/div

INTG = REF, FIGURE 6

5.0V

400mA

100mA

200mA

Typical Operating Characteristics (continued)

(Circuit of Figure 5, V

= +3.3V, T

= +25°C, unless otherwise noted.)

100µs/div

LOAD TRANSIENT

(L = 33µH, 500µs PULSE)

MAX1779-18

A. V

MAIN

= 5V, 50mV/div

B. I

MAIN

= 10mA to 100mA, 50mA/div

FIGURE 5

5.1V

4.9V

100mA

100µs/div

LOAD TRANSIENT WITHOUT INTEGRATOR

(L = 33µH, 500µs PULSE)

MAX1779-19

A. V

MAIN

= 5V, 50mV/div

B. I

MAIN

= 10mA to 100mA, 50mA/div

INTG = REF, FIGURE 5

5.1V

4.9V

100mA

5.0V

10µs/div

LOAD TRANSIENT

(L = 33µH, 5µs PULSE)

MAX1779-20

A. V

MAIN

= 5V, 50mV/div

B. I

MAIN

= 20mA to 200mA, 100mA/div

FIGURE 5

5.1V

4.9V

200mA

5.0V

200µs/div

STARTUP WAVEFORM

(L = 10µH)

MAX1779-21

A. V

SHDN

= 0 to 2V, 2V/div

B. V

MAIN

= 5V, 1V/div

C. I

, 500 mA/div

FIGURE 6, R

MAIN

= 100Ω

500mA

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

Converter 1

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