Rainbow-electronics MAX8742 Manual do Utilizador descarregar pdf (Página 7)

MAX8741/MAX8742

500kHz Multi-Output Power-Supply Controllers

with High Impedance in Shutdown

_______________________________________________________________________________________ 7

100

0.001 0.01 0.1 1 10

EFFICIENCY vs. 5V OUTPUT CURRENT

MAX8741/42 toc01

5V OUTPUT CURRENT (A)

EFFICIENCY (%)

ON5 = 5V

ON3 = 0V

f = 500kHz

MAX8741

V+ = 15V

V+ = 6V

100

0.001 0.01 0.1 1 10

EFFICIENCY vs. 3.3V OUTPUT CURRENT

MAX8741/42 toc02

3.3V OUTPUT CURRENT (A)

EFFICIENCY (%)

ON5 = ON3 = 5V

f = 500kHz

MAX8741

V+ = 15V

V+ = 6V

800

600

400

200

01051520

MAXIMUM V

OUTPUT CURRENT

vs. INPUT VOLTAGE

MAX8741/42 toc03

INPUT VOLTAGE (V)

MAXIMUM V

OUTPUT CURRENT (mA)

5V LOAD = 0

5V LOAD = 3A

100

0.01

01052030

NO-LOAD INPUT CURRENT

vs. INPUT VOLTAGE

0.1

MAX8741/42 toc04

INPUT VOLTAGE (V)

INPUT CURRENT (mA)

15 25

SKIP = 0V

SKIP = V

ON5 = ON3 = 5V

NO LOAD

10,000

01052030

V+ STANDBY INPUT CURRENT

vs. INPUT VOLTAGE

100

1000

MAX8741/42 toc05

INPUT VOLTAGE (V)

INPUT CURRENT (µA)

15 25

ON5 = ON3 = 0V

NO LOAD

010515202530

SHUTDOWN INPUT CURRENT

vs. INPUT VOLTAGE

MAX8741/42 toc06

INPUT VOLTAGE (V)

INPUT CURRENT (µA)

SHDN = 0V

0.001 0.01 1

MINIMUM V

TO V

OUT

DIFFERENTIAL

vs. 5V OUTPUT CURRENT

MAX8741/42 toc07

5V OUTPUT CURRENT (A)

MINIMUM V

TO V

OUT

DIFFERENTIAL (mV)

1000

100

0.1 10

f = 500kHz

f = 333kHz

OUT

> 4.8V

1000

0.1

0.001 0.01 1 10

SWITCHING FREQUENCY

vs. LOAD CURRENT

100

MAX8741/42 toc08

LOAD CURRENT (A)

SWITCHING FREQUENCY (kHz)

0.1

3.3V, V

= 15V

5V, V

= 15V

3.3V, V

= 6.5V

5V, V

= 6.5V

4.90

4.92

4.96

4.94

4.98

5.00

02010 30 40 50

REGULATOR OUTPUT VOLTAGE

vs. OUTPUT CURRENT

MAX8741/42 toc09

OUTPUT CURRENT (mA)

OUTPUT VOLTAGE (V)

= 15V

ON3 = ON5 = 0V

Typical Operating Characteristics

(Circuit of Figure 1, Table 1, 6A/500kHz components, T

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10 11 12 ... 32 33

MAX8741/MAX8742 1

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