4

ASTEC Semiconductor

AS384x

Current Mode Controller

Electrical Characteristics

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

5 V Regulator

Output Voltage

V

REG

T

4.95

5.00

5.05

V

Line Regulation

PSRR

12 ² V

2

10

mV

Load Regulation

1 ² I

2

10

mV

TC

REG

0.2

0.4

mV/¡C

Line, load, temperature

4.85

5.15

V

Over 1,000 hrs at 25¡C

5

25

mV

Output Noise Voltage

V

NOISE

10 Hz ² f ² 100 kHz, T

50

µV

Short Circuit Current

I

SC

30

100

180

mA

2.5 V Internal Reference

Nominal Voltage

V

FB

T = 25¡C; I

2.475

2.500

2.525

V

Line Regulation

PSRR

12 V ² V

2

5

mV

Load Regulation

1 ² I

2

5

mV

TC

VFB

0.1

0.2

mV/¡C

Line, load, temperature

2.450

2.500

2.550

V

Over 1,000 hrs at 125¡C

2

12

mV

Oscillator

Initial Accuracy

f

OSC

T

47

52

57

kHz

Voltage Stability

12 V ² V

0.2

1

%

TC

f

T

5

%

Amplitude

f

OSC

V

1.6

V

Upper Trip Point

V

H

2.9

V

Lower Trip Point

V

L

1.3

V

Sync Threshold

V

SYNC

400

600

800

mV

Discharge Current

I

D

7.5

8.7

9.5

mA

Duty Cycle Limit

R

46

50

52

%