Rainbow-electronics MAX1730 Manual de usuario descargar pdf (Pagina 4)

MAX1730

50mA Regulated Step-Down Charge Pump

for 1.8V or 1.9V Logic

4 _______________________________________________________________________________________

Typical Operating Characteristics

= +3.6V, FB = GND, SHDN = IN, C

= 1µF, C1 = C2 = 0.22µF, C

OUT

= 4.7µF, T

= +25°C, unless otherwise noted.)

0.1 101 100 1000

EFFICIENCY

vs. OUTPUT CURRENT

MAX1730 TOC01

OUTPUT CURRENT (mA)

EFFICIENCY (%)

100

= 5.0V

= 2.7V

= 3.6V

= 3.3V

100

2.5 3.53.0 4.0 4.5 5.0 5.5

EFFICIENCY vs. INPUT VOLTAGE

MAX1730 TOC02

INPUT VOLTAGE (V)

EFFICIENCY (%)

OUT

= 25mA

100

2.5 3.53.0 4.0 4.5 5.0 5.5

EFFICIENCY vs. INPUT VOLTAGE

MAX1730 TOC02

INPUT VOLTAGE (V)

EFFICIENCY (%)

OUT

= 50mA

2.0 3.0 3.52.5 4.0 4.5 5.0 5.5

INPUT CURRENT vs. INPUT VOLTAGE

MAX1730 TOC04

INPUT VOLTAGE (V)

INPUT CURRENT (µA)

SHUTDOWN CURRENT

NO-LOAD

SUPPLY CURRENT

0.1 101 100 1000

OUTPUT VOLTAGE

vs. OUTPUT CURRENT

MAX1730 TOC05

OUTPUT CURRENT (mA)

OUTPUT VOLTAGE (V)

1.85

1.75

1.77

1.79

1.83

1.81

= 5.0V

= 2.7V

= 3.3V

0.4

0.2

0.8

0.6

1.2

1.4

1.6

1.8

1.0

2.0

0231 456

OUTPUT VOLTAGE vs. INPUT VOLTAGE

MAX1730 TOC06

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

OUT

= 0 to 50mA

1 2 3 4 5 6 7 8

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Rainbow-electronics MAX1730 Manual de usuario Pagina 4

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