US3034
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)
TOP VIEW
1
2
3
4
8
7
6
5
Drv
V12
SS
CS+
CS-
Gnd
Vfb
Vhyst
qJA =160°C/W
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.
PARAMETER
SYM TEST CONDITION
MIN TYP
MAX UNITS
F.B Voltage Initial Accuracy
F.B Voltage Total Variation
F.B Voltage Line Regulation
F.B Input Bias Current
Min On Time
VFB
TJ =25°C
1.237 1.250 1.262
1.225 1.250 1.275
0.2
V
V
%
uA
nS
IFB
VFB =1.25V
-1
+1
VFB is sq wave with 300 ns on
time and 2 uS off time
VFB is sq wave with 300 ns off
time and 2 uS on time
ISOURCE =500uA, VFB =1.5V
ISINK =500uA, VFB =1V
VFB =1V
VFB =1V
VFB =1.5V
Load=IRL3303
C.S+ , C.S- from 1.3V to 3.7V
VCS+ = VCS-
800
800
Min Off Time
nS
Vhyst pin output-HI
Vhyst pin output-LO
Supply Current
Maximum Duty Cycle
Minimum Duty Cycle
Gate Drive Rise/Fall Time
C.L Threshold Current
C.S Comp Common Mode
Soft Start Current
11
V
V
mA
%
1
I12SW
DMAX
DMIN
VGATE
ICL
10
100
0
0
%
70
20
nS
uA
V
4.5
10
uA
Rev. 1.8
1/13/99
4-2
UNISEM [ UNISEM ]
