5

ASTEC Semiconductor

AS384x

Current Mode Controller

Electrical characteristics are guaranteed over full junction temperature range (0 to 105¡C). Ambient temperature must be derated

based on power dissipation and package thermal characteristics. The conditions are: V

otherwise stated. To override UVLO, V

Parameter

Symbol

Test Condition

Min.

Typ.

Max.

Unit

Error Amplifier

Input Voltage

V

FB

T

2.475

2.500

2.525

V

Input Bias Current

I

BIAS

Ð0.1

Ð1

µA

Voltage Gain

A

VOL

2 ² V

65

90

1

dB

Transconductance

G

m

1

mA/mV

GBW

0.8

1.2

MHz

Power Supply Rejection Ratio

PSRR

12 ² V

60

70

dB

Output Sink Current

I

COMPL

V

2

6

mA

Output Source Current

I

COMPH

V

0.5

0.8

mA

Output Swing High

V

COMPH

V

5

5.5

V

Output Swing Low

V

COMPL

V

0.7

1.1

V

Current Sense Comparator

AV

CS

Ð0.2 ² V

2.85

3.0

3.15

V/V

I

2

V

LS

V

1.5

V

V

0.9

1

1.1

V

Power Supply Rejection Ratio

PSRR

12 ² V

70

dB

Input Bias Current

I

BIAS

Ð1

Ð10

µA

t

PD

85

150

ns

Output

Output Low Level

V

OL

I

0.1

0.4

V

V

OL

I

1.5

2.2

V

Output High Level

V

OH

I

13

13.5

V

V

OH

I

12

13.5

V

t

R

C

50

150

ns

t

F

C

50

150

ns

Housekeeping

Start-up Threshold

V

3842/4

15

16

17

V

3843/5

7.8

8.4

9.0

V

Minimum Operating Voltage

V

3842/4

9

10

11

V

After Turn On

3843/5

7.0

7.6

8.2

V

Output Low Level in UV State

V

OUV

I

1.5

2.0

V

T

OT

125

¡C