MC34280 查看數據表（PDF） - ON Semiconductor

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MC34280

Power Supply & Management IC for Handheld Electronic Products

ON Semiconductor 

MC34280

TYPICAL ELECTRICAL CHARACTERISTICS (Cont’d)

Figure 10. Efficiency of VAUX versus Output

Current (VAUX = 20 V, L2 = 33 uH, Various VIN)

80%

75%

70%

65%

60%

55%

50%

1

Vin = 3V

Vin = 1.8V

Vin = 1.5V

Vin = 1V

3

5

7

9

11

13

15

IOUT_AUX, AUX OUTPUT CURRENT (mA)

Figure 11. Efficiency of VAUX versus Input

Voltage (VAUX = 20 V, L2 = 33 uH, Various IOUT)

80%

75%

70%

65%

60%

55%

50%

1

Iout = 1mA

Iout = 5mA

Iout = 10mA

Iout = 15mA

1.5

2

2.5

3

VIN, INPUT VOLTAGE (V)

Figure 12. Efficiency of VAUX versus Output

Current (VAUX = 5 V, L2 = 82 uH, Various VIN)

85%

80%

75%

70%

65%

60%

55%

50%

45%

40%

1

Vin = 3V

Vin = 2.4V

Vin = 1.8V

Vin = 1.5V

Vin = 1V

5

10

15

20

25

30

35

IOUT_AUX, AUX OUTPUT CURRENT (mA)

Figure 13. Efficiency of VAUX versus Input

Voltage (VAUX = 5 V, L2 = 82 uH, Various IOUT)

85%

80%

75%

70%

65%

50%

1

Iout = 1V

Iout = 5V

Iout = 10V

Iout = 15V

Iout = 25V

1.5

2

2.5

3

VIN, INPUT VOLTAGE (V)

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