Rainbow-electronics MAX1709 Bedienungsanleitung PDF herunterladen (Seite 5)

MAX1709

4A, Low-Noise, High-Frequency,

Step-Up DC-DC Converter

_______________________________________________________________________________________ 5

Typical Operating Characteristics

= +25°C, unless otherwise noted.)

100

0.001 0.1 10.01 10

EFFICIENCY vs.

OUTPUT CURRENT (V

OUT

= 3.3V)

MAX1709 TOC01

OUTPUT CURRENT (A)

EFFICIENCY (%)

= 2.5V

= 1.2V

100

0.001 0.1 10.01 10

EFFICIENCY vs.

OUTPUT CURRENT (V

OUT

= 5V)

MAX1709 TOC02

OUTPUT CURRENT (A)

EFFICIENCY (%)

= 3.3V

= 2.5V

83.0

84.0

83.5

85.0

84.5

86.0

85.5

0.4 0.6 0.70.5 0.8 0.9 1.0

EFFICIENCY vs. SWITCHING FREQUENCY

= 3.3V, V

OUT

= 5V, I

OUT

= 2A)

MAX1709 TOC03

OPERATING FREQUENCY (MHz)

EFFICIENCY (%)

-1

-2

021 345

LOAD REGULATION

= 3.3V, V

OUT

= 5V)

MAX1709 TOC04

OUTPUT CURRENT (A)

OUT

REGULATION (%)

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

2.0 2.5 3.0 3.5 4.0

LINE REGULATION

OUT

= 5V, I

OUT

= 1A)

MAX1709 TOC05

INPUT VOLTAGE (V)

OUT

REGULATION (%)

1000

0.1

01.00.5 2.0 3.5

NO-LOAD INPUT CURRENT

vs. INPUT VOLTAGE

100

MAX1709 TOC06

INPUT VOLTAGE (V)

INPUT CURRENT (mA)

1.5 2.5 3.0

OUT

= 3.3V

OUT

= 5V

INPUT VOLTAGE

INCREASING

INPUT VOLTAGE

DECREASING

2.8

0.6

0.001 0.1 10.01 10

STARTUP VOLTAGE

vs. LOAD CURRENT

MAX1709 TOC07

LOAD CURRENT (A)

STARTUP VOLTAGE (V)

1.0

0.8

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

= -40

= +25

= +85°C

OUT

= 3.3V

OUT

= 5V

-2.0

-1.0

-1.5

-0.5

0.5

1.0

-40 10 35-15 60 85

SWITCHING FREQUENCY

vs. TEMPERATURE

MAX1709 TOC08

TEMPERATURE (°C)

FREQUENCY CHANGE (%)

OUT

= 3.3V

-5

0.1 1 10

NOISE vs. FREQUENCY

MAX1709 TOC09

FREQUENCY (MHz)

NOISE (mV

RMS

)

-10

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

Step-Up DC-DC Converter 1

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