Rainbow-electronics MAX8815A Manual de usuario descargar pdf (Pagina 4)

MAX8815A

1A, 97% Efficiency, 30µA Quiescent Current

Step-Up Converter with True Shutdown

4 _______________________________________________________________________________________

Typical Operating Characteristics

OUTS

= V

POUT

= 5V, V

BATT

= V

= 3.6V, V

SKIPB

= GND.)

EFFICIENCY vs. LOAD

CURRENT, V

OUT

= 3.3V

MAX8815A toc01

OUTPUT CURRENT (mA)

EFFICIENCY (%)

100101

100

0.1 1000

= 1.8V, SKIP

= 1.5V, SKIP

= 3V, SKIP

= 2.5V, SKIP

= 3V, FPWM

= 2.5V, SKIP

= 1.8V, SKIP

= 1.5V, FPWM

EFFICIENCY vs. LOAD

CURRENT, V

OUT

= 5V

MAX8815A toc02

OUTPUT CURRENT (mA)

EFFICIENCY (%)

100101

100

0.1 1000

= 4.2V,

SKIP

= 3.6V,

= 3V,

= 2.4V,

= 1.8V,

= 1.5V

FPWM

= 4.2V,

= 3.6V,

= 3V,

= 2.4V,

= 1.8V,

= 1.5V

0.4

0.2

0.8

0.6

1.2

1.0

1.4

1.2 2.21.7 2.7 3.2 3.7

MAXIMUM LOAD CURRENT

vs. INPUT VOLTAGE

MAX8815A toc03

INPUT VOLTAGE (V)

LOAD CURRENT (A)

OUT

= 5V

OUT

= 3.3V

4.80

4.90

4.85

5.00

4.95

5.05

5.10

0.1 101 100 1000

OUTPUT VOLTAGE

vs. LOAD CURRENT

MAX8815A toc04

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

FPWM

SKIP

= 3.6V,

= 3V,

= 2.5V,

= 1.8V,

= 1.5V

3.22

3.30

3.24

3.26

3.28

3.34

3.32

3.36

3.38

0.1 101 100 1000

OUTPUT VOLTAGE

vs. LOAD CURRENT

MAX8815A toc05

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

= 3.0V,

= 2.5V,

= 1.8V,

= 1.5V

FPWM

SKIP

1.2 3.22.2 4.2 5.2 6.2

OUTPUT VOLTAGE

vs. INPUT VOLTAGE

MAX8815A toc06

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

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

MAX8815A 1

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Rainbow-electronics MAX8815A Manual de usuario Pagina 4

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