US3036

4-2

Rev. 1.1

12/4/98

ABSOLUTE MAXIMUM RATINGS

ABSOLUTE MAXIMUM RATINGS

F.B Pin Voltage........................................................

-0.3V to 5V

Storage Temperature Range .................................

-65 TO 150

Operating Junction Temperature ............................... 0 TO 150

PACKAGE INFORMATION

PACKAGE INFORMATION

8 PIN PLASTIC SOIC (S)

PARAMETER

SYM

TEST CONDITION

MIN

TYP

MAX

UNITS

F.B Voltage Initial Accuracy

°C

1.237

1.250

1.262

V

F.B Voltage Total Variation

1.225

1.250

1.275

V

F.B Voltage Line Regulation

0.2

%

F.B Input Bias Current

-1

+1

uA

Min On Time

800

nS

time and 2 uS off time

Min Off Time

800

nS

time and 2 uS on time

Supply Current

10

mA

Maximum Duty Cycle

100

%

Minimum Duty Cycle

0

%

Gate Drive Rise/Fall Time

Load=1000pF

70

nS

C.L Threshold Current

C.S+ , C.S- from 1.3V to 3.7V

20

uA

C.S Comp Common Mode

0

4.5

V

Soft Start Current

10

uA

UVLO Threshold

4.25

4.4

4.55

V

ELECTRICAL SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

°C. Low duty cycle

pulse testing are used which keeps junction and case temperatures equal to the ambient temperature.

4

3

2

1

5

6

7

8

TOP VIEW

Drv

Vcc

Vfb

NC

Gnd

CS-

CS+

SS