ICL7660S, ICL7660A

FN3179 Rev 7.00

Page 5 of 13

January 23, 2013

Functional Block Diagram

VOLTAGE

LEVEL

TRANSLATOR

SUBSTRATE

NETWORK

OSC

LV

V+

CAP+

CAP-

7

OSCILLATOR

AND DIVIDE-BY-

2 COUNTER

6

INTERNAL SUPPLY

REGULATOR

3

LOGIC

3

3

8

2

3

4

5

GND

Typical Performance Curves

See Figure 12, “ICL7660S Test Circuit” on page 7) and Figure 13 “ICL7660A Test Circuit” on page 7

FIGURE 1. OPERATING VOLTAGE AS A

FUNCTION OF TEMPERATURE

FIGURE 2. OUTPUT SOURCE RESISTANCE AS A

FUNCTION OF SUPPLY VOLTAGE

FIGURE 3. OUTPUT SOURCE RESISTANCE AS A

FUNCTION OF TEMPERATURE

FIGURE 4. POWER CONVERSION EFFICIENCY AS A

FUNCTION OF OSCILLATOR FREQUENCY

-55

-25

0

25

50

100

125

12

10

8

6

4

2

0

TEMPERATURE (°C)

SUPPLY VOLTAGE RANGE

(NO DIODE REQUIRED)

250

200

150

100

50

0

02

4

6

8

10

12

SUPPLY VOLTAGE (V)

350

300

250

200

150

100

50

0

-50

-25

0

25

50

75

100

125

TEMPERATURE (°C)

V+ = 12V

V+ = 5V

V+ = 5V

V+ = 2V

98

96

94

92

90

88

86

84

82

80

100

1k

10k

50k

V+ = 5V