Rainbow-electronics MAX652 Manual de usuario descargar pdf (Pagina 4)

MAX649/MAX651/MAX652

5V/3.3V/3V or Adjustable, High-Efficiency,

Low I

, Step-Down DC-DC Controllers

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

= +25°C, unless otherwise noted.)

SUPPLY CURRENT vs. TEMPERATURE

I+ (mA)

-60 -20 60 140

MAX649-A01

TEMPERATURE (°C)

20 100-40 0 8040 120

V+ = 10V

V+ = 16.5V

V+ = 4V

4.0

SHUTDOWN CURRENT

vs. TEMPERATURE

0.5

3.5

I+ (mA)

3.0

2.5

-60 -20 60 140

MAX649-A02

TEMPERATURE (°C)

20 100-40 0 8040 120

2.0

1.5

V+ = 8V

V+ = 16.5V

V+ = 4V

1.0

2500

0 1 2 3 4 5 6 7 8 9 101112131415

MAX649 MAXIMUM LOAD CURRENT

vs. SUPPLY VOLTAGE

500

2000

MAX649-A03

INPUT VOLTAGE (V)

MAXIMUM LOAD CURRENT (mA)

1500

1000

OUT

= 5V

CIRCUIT OF FIGURE 1

100

100µ 1m 10m 100m 1

MAX649

EFFICIENCY vs. LOAD CURRENT

MAX649-A04

LOAD CURRENT (A)

EFFICIENCY (%)

= 6V

= 8V

= 10V

= 12V

= 15V

OUT

= 5V

TOP TO BOTTOM:

SWITCH ON-TIME

vs. TEMPERATURE

(ms)

-60 -40 -20 60

MAX649-A07

TEMPERATURE (°C)

0 20 40 80 100 120

V+ = 5V

100

100µ 1m 10m 100m 1

MAX651

EFFICIENCY vs. LOAD CURRENT

MAX649-A05

LOAD CURRENT (A)

EFFICIENCY (%)

= 4.3V

= 5V

= 8V

= 10V

= 12V

= 15V

OUT

= 3.3V

TOP TO BOTTOM:

100

100µ 1m 10m 100m 1

MAX652

EFFICIENCY vs. LOAD CURRENT

MAX649-A06

LOAD CURRENT (A)

EFFICIENCY (%)

= 4.3V

= 5V

= 8V

= 10V

= 12V

= 15V

OUT

= 3V

TOP TO BOTTOM:

2.5

1.5

SWITCH OFF-TIME

vs. TEMPERATURE

OFF

(ms)

MAX649-A08

TEMPERATURE (°C)

2.0

V+ = 5V

-60 -40 -20 600 20 40 80 100 120

8.0

6.0

SWITCH ON-TIME/OFF-TIME RATIO

vs. TEMPERATURE

6.4

7.6

/tOFF RATIO

7.2

6.8

6.2

6.6

7.8

7.4

7.0

V+ = 5V

-60 -20 60 140

MAX649-A9

TEMPERATURE (°C)

20 100-40 0 8040 120

1 2 3 4 5 6 7 8 9 ... 15 16

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Rainbow-electronics MAX652 Manual de usuario Pagina 4

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