4-7

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TYPICAL CHARACTERISTICS

All curves are generated using the test circuit of Figure 1 with V

otherwise noted.

Supply Current vs.

Supply Voltage

1)

Output Voltage Drop

vs. Load Current

4)

Output Source Resistance

vs. Supply Voltage

7)

Output Source Resistance

vs. Temperature

8)

Oscillator Frequency

vs. Supply Voltage

9)

Output Voltage vs.

Oscillator Frequency

5)

Efficiency vs.

Oscillator Frequency

6)

2)

3)

Supply Current vs.

Oscillator Frequency

Efficiency vs.

Load Current

SUPPLY VOLTAGE (V)

LOAD CURRENT (mA)

OSCILLATOR FREQUENCY (kHz)

SUPPLY VOLTAGE (V)

100

92

84

76

68

60

040

20

100

80

60

600

300

400

500

100

200

0

1.5

2.5

2.0

3.5

5.0

4.5

4.0

3.0

5.5

10,000

1000

100

10

1

0.01

0.1

1

10

100

LV = GND

LV = OPEN

DOUBLER MODE

LV = OUT

INVERTING MODE

DOUBLER MODE

16

14

12

10

8

6

4

TEMPERATURE (

°C)

0

20

40

-20

-40

80

60

100

SUPPLY VOLTAGE (V)

12

10

8

6

4

2

0

1.0

2.0

1.5

2.5 3.0 3.5 4.0 4.5 5.0 5.5

OSCILLATOR FREQUENCY (kHz)

OSCILLATOR FREQUENCY (kHz)

V+ = 5.5V

V+ = 3.5V

V+ = 4.5V

V+ = 2.5V

V+ = 1.5V

LOAD CURRENT (mA)

2.0

1.6

1.2

0.8

0.4

0

040

20

100

80

60

15

12

9

6

3

0

0.5

1.5

1.0

2.0

3.0 3.5 4.0

2.5

5.5

5.0

4.5

V+ = 5.5V

V+ = 3.5V

V+ = 4.5V

V+ = 2.5V

V+ = 1.5V

-5.0

-4.0

-4.5

-3.5

-3.0

0.1 0.2 0.4

1

4

10 20 40

2

100

100

96

92

88

84

80

76

72

68

64

60

0.1 0.2 0.4

1

4

10 20 40

2

100

ILOAD = 10mA

ILOAD = 10mA

ILOAD = 1mA

LV GROUNDED

FC = OPEN, OSC = OPEN

LV OPEN

ILOAD = 1mA

ILOAD = 80mA

ILOAD =

80mA

V+ = 1.5VDC

V+ = 3VDC

V+ = 5VDC

TC660

100mA CHARGE PUMP DC-TO-DC

VOLTAGE CONVERTER