MAX8717 查看數據表（PDF） - Maxim Integrated

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MAX8717

Interleaved High-Efficiency, Dual Power-Supply Controllers for Notebook Computers

Maxim Integrated 

Interleaved High-Efficiency, Dual Power-Supply

Controllers for Notebook Computers

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VIN = 12V, VDD = VCC = 5V, SKIP_ = GND, FSEL = REF, TA = +25°C, unless otherwise noted.)

1.8V OUTPUT EFFICIENCY

vs. LOAD CURRENT

100

VIN = 12V

L = 3.2µH

90

SKIP

MODE

80

70

PWM

MODE

60

LOW-NOISE

MODE

50

0.001

0.01

0.1

1

10

LOAD CURRENT (A)

NO-LOAD SUPPLY CURRENT vs. INPUT

VOLTAGE (FORCED-PWM MODE)

28

24

IBIAS

20

16

12

8

4

0

0

IIN

SKIP1 = SKIP2 = VCC

ON1 = ON2 = VCC

4

8 12 16 20 24

INPUT VOLTAGE (V)

NO-LOAD SUPPLY CURRENT vs. INPUT

VOLTAGE (IDLE MODE)

10

SKIP1 = SKIP2 = GND OR REF

ON1 = ON2 = VCC

1

IBIAS

0.1

IIN

0.01

0

4

8 12 16 20 24

INPUT VOLTAGE (V)

OUT2 IDLE-MODE CURRENT

vs. INPUT VOLTAGE

2.0

MAXIMUM DUTY-

1.8 CYCLE LIMITED

1.6

1.4

SKIP2 = GND

1.2

1.0

0.8

SKIP2 = REF

0.6

0.4

0.2

0

0 4 8 12 16 20 24

INPUT VOLTAGE (V)

OUT2 SWITCHING FREQUENCY

vs. LOAD CURRENT

1000

SKIP2 = VCC

100

SKIP2 = REF

SKIP2 = GND

10

1

0.001

0.01

0.1

1

10

LOAD CURRENT (A)

5V OUTPUT VOLTAGE

vs. INPUT VOLTAGE

5.05

5.00

4.95

4.90

0

SKIP2 = VCC

4

8 12 16 20 24

INPUT VOLTAGE (V)

3.3V OUTPUT VOLTAGE

vs. INPUT VOLTAGE

3.40

OUT2 DROPOUT VOLTAGE

vs. LOAD CURRENT

0.4

3.35

3.30

3.25

0

SKIP1 = VCC

4

8 12 16 20 24

INPUT VOLTAGE (V)

0.3

0.2

0.1

0

0

VOUT2 = 4.8V

1

2

3

4

5

LOAD CURRENT (A)

8 _______________________________________________________________________________________

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