US3034CS datasheet(2/9 Pages) UNISEM

2 / 9 page

US3034

4-2

Rev. 1.8

1/13/99

ABSOLUTE MAXIMUM RATINGS

V12 Supply Voltages ............................................................. 20V

F.B Pin Voltages........................................................

-0.3V to 5V

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

-65 TO 150

°C

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

°C

PACKAGE INFORMATION

8 PIN PLASTIC SOIC (S)

θJA=160°C/W

PARAMETER

SYM

TEST CONDITION

MIN

TYP

MAX

UNITS

F.B Voltage Initial Accuracy

VFB

TJ =25

°C

1.237

1.250

1.262

F.B Voltage Total Variation

1.225

1.250

1.275

F.B Voltage Line Regulation

0.2

F.B Input Bias Current

IFB

VFB =1.25V

-1

Min On Time

VFB is sq wave with 300 ns on

800

time and 2 uS off time

Min Off Time

VFB is sq wave with 300 ns off

800

time and 2 uS on time

Vhyst pin output-HI

ISOURCE =500uA, VFB =1.5V

Vhyst pin output-LO

ISINK =500uA, VFB =1V

Supply Current

I12SW

VFB =1V

Maximum Duty Cycle

DMAX

VFB =1V

100

Minimum Duty Cycle

DMIN

VFB =1.5V

Gate Drive Rise/Fall Time

VGATE

Load=IRL3303

C.L Threshold Current

ICL

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

C.S Comp Common Mode

VCS+ = VCS-

4.5

Soft Start Current

ELECTRICAL SPECIFICATIONS

Unless otherwise specified the following specification applies over V12 =12V, and TA =0 to 70

°C. Low duty cycle

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

TOP VIEW

Drv

V12

Vfb

Vhyst

Gnd

CS-

CS+

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