AMC DOC. #: AMC3842B_C (LF)

AMC3842B/43B

March

2004

Copyright

© 2002, ADD Microtech Corp.

5

www.addmtek.com

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

≤ V

65

90

dB

Unity Gain Bandwidth (note 7)

UGBW

0.7

1

MHz

Power Supply Rejection Ratio

PSRR

12V

≤ V

60

70

dB

Output Sink Current

2

7

mA

Output Source Current

-0.5

-1.0

mA

High Output Voltage

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 7)

50

150

ns

Fall Time (note 7)

50

150

ns

Under-Voltage Lockout Section

AMC3842B

14.5

16.0

17.5

Start Threshold

AMC3843B

7.8

8.4

9.0

V

AMC3842B

8.5

10

11.5

Min. Operating Voltage

AMC3843B

7.0

7.6

8.2

V

PWM Section

Maximum Duty Cycle

AMC3842B/43B

94

97

100

%

Total Standby Current

AMC3842B

0.2

0.35

Startup Current

AMC3843B

0.5

1.0

mA

Operating Supply Current

14

17

mA

Zener Voltage

30

35

V

note 6:

note 7:

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

note 8:

note 9: