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MC33680

Dual DC−DC Regulator for Electronic Organizer

ON Semiconductor 

MC33680

DYNAMIC ELECTRICAL CHARACTERISTICS (Refer to TIMING DIAGRAMS, TA = 0 to 70°C unless otherwise noted.)

Rating

Symbol

Min

Typ

Max

Unit

Minimum PORB to Control delay

tPORC

500

nS

90%

90%

85%

85%

80%

Vin = 3V

75%

Vin = 1.8V

Vin = 1.5V

Vin = 1V

70%

0 10 20 30 40 50 60 70 80 90 100

IOUT_MAIN, MAIN OUTPUT CURRENT (mA)

Figure 4. Efficiency of VMAIN versus Output

Current (VMAIN = 3.3 V, L = 33 uH, Various VIN)

80%

Iout = 10mA

Iout = 60mA

75%

Iout = 100mA

70%

1

1.5

2

2.5

3

VIN, INPUT VOLTAGE (V)

Figure 5. Efficiency of VMAIN versus Input

Voltage (VMAIN = 3.3 V, L1 = 33 uH, Various IOUT)

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 6. Efficiency of VAUX versus Output

Current (VAUX = 25 V, L2 = 33 uH, Various VIN)

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 7. Efficiency of VAUX versus Input

Voltage (VAUX = 25 V, L2 = 33 uH, Various IOUT)

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