Rainbow-electronics MAX1800 Uživatelský manuál stáhnout pdf (Strana 5)

MAX1800

Digital Camera Step-Up

Power Supply

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(Circuit of Figure 1, V

INPUT

= 2.4V, T

= +25°C, unless otherwise noted.)

1 100010010

MAIN OUTPUT

EFFICIENCY vs. LOAD CURRENT

100

MAX1800 toc01

LOAD CURRENT (mA)

EFFICIENCY (%)

OUT

= 2.7V

= 2.5V

= 2.0V

= 1.5V

1 100010010

MAIN OUTPUT

EFFICIENCY vs. LOAD CURRENT

100

MAX1800 toc02

LOAD CURRENT (mA)

EFFICIENCY (%)

OUT

= 3.3V

= 3.0V

= 2.0V

= 2.5V

= 1.5V

1 100010010

100

MAX1800 toc03

LOAD CURRENT (mA)

EFFICIENCY (%)

OUT

= 5V

= 3.0V

= 2.0V

= 2.5V

= 1.5V

MAIN OUTPUT

EFFICIENCY vs. LOAD CURRENT

1.240

1.245

1.250

1.255

1.260

REFERENCE VOLTAGE vs.

TEMPERATURE

MAX1800 toc05

TEMPERATURE (°C)

REFERENCE VOLTAGE (V)

-40 20 40-20 0 60 80

1.247

1.249

1.248

1.251

1.250

1.252

1.253

0 10050 150 200 250

REFERENCE VOLTAGE

vs. REFERENCE CURRENT

MAX1800 toc06

REFERENCE CURRENT (µA)

REFERENCE VOLTAGE (V)

400

300

200

100

500

600

0 0.5 1.0 1.5 2.0 2.5

MAX1800 toc04

INPUT VOLTAGE (V)

STARTUP CURRENT (mA)

MINIMUM STARTUP CURRENT

vs. INPUT VOLTAGE

1 2 3 4 5 6 7 8 9 10 ... 23 24

Digital Camera Step-Up 1
Power Supply 1

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