CM3842/3843

2001/06/27

Advanced

Champion Microelectronic Corporation

Page 5

ELECTRICAL CHARACTERISTICS (Continued)

Error Amplifier Section

Input Bias Current

-0.1

-2

µA

Input Voltage

COMP = 2.5V

2.42

2.50

2.58

V

Open Loop Voltage Gain

2V

65

90

dB

Unity Gain Bandwidth (note 8)

UGBW

0.7

1

MHz

Power Supply Rejection Ratio

PSRR

12V

60

70

dB

Output Sink Current

2

7

mA

Output Source Current

-0.5

-1.0

mA

High Output Voltage

Ω to GND

5

6

V

Low Output Voltage

0.7

1.1

V

Output Section

0.1

0.4

Output Low Level

1.4

2.2

V

13

13.5

Output High Level

12

13.0

V

Rise Time (note 8)

50

150

ns

Fall Time (note 8)

50

150

ns

Under-Voltage Lockout Section

CM3842

14.5

16.0

17.5

Start Threshold

CM3843

7.8

8.4

9.0

V

CM3842

8.5

10

11.5

Min. Operating Voltage

CM3843

7.0

7.6

8.2

V

PWM Section

CM3842/43

94

97

100

Maximum Duty Cycle

%

Minimum Duty Cycle

0

%

Total Standby Current

CM3842

0.2

0.35

Startup Current

CM3843

0.5

1.0

mA

Operating Supply Current

14

17

mA

Zener Voltage

30

35

V

note 7:

note 8:

These parameters, although guaranteed, are not 100% tested in production prior to shipment

note 9: