ASTEC Semiconductor

Current Mode Controller

AS2842/3/4/5

41

Electrical characteristics are guaranteed over full junction temperature range (-40 to 105

° C ). Ambient temperature must be derated based

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Error Amplifier

Input Voltage

° C

2.475

2.50

2.525

V

Input Bias Current

– 0.1

–1

µA

Voltage Gain

2

65

90

dB

Transconductance

1

mA/mV

Unity Gain Bandwidth

1

GBW

0.8

1.2

MHz

Power Supply Rejection Ratio

PSRR

12

60

70

dB

Output Sink Current

2

6

mA

Output Source Current

0.5

0.8

mA

Output Swing High

Ω to Ground

5

5.5

V

Output Swing Low

Ω to Pin 8

0.7

1.1

V

Current Sense Comparator

Transfer Gain

2,3

–0.2

2.85

3.0

3.15

V/V

2

1.5

V

0.9

1

1.1

V

Power Supply Rejection Ratio

PSRR

12

70

dB

Input Bias Current

–1

–10

µA

Propagation Delay to Output

1

85

150

ns

Output

Output Low Level

0.1

0.4

V

1.5

2.2

V

Output High Level

13

13.5

V

12

13.5

V

Rise Time

1

50

150

ns

Fall Time

1

50

150

ns

Housekeeping

Start-up Threshold

2842/4

15

16

17

V

2843/5

7.8

8.4

9.0

V

Minimum Operating Voltage

2842/4

9

10

11

V

After Turn On

2843/5

7.0

7.6

8.2

V

Output Low Level in UV State

1.5

2.0

V

Over-Temperature Shutdown

4

125

°C