US2075
ABSOLUTE MAXIMUM RATINGS
12V Supply Voltage ............................................................. 14V
5V Supply Voltage .............................................................. 7V
LDO Power Dissipation .................................... Internally Limited
FB Pin Voltage........................................................
-0.3V to 5V
Storage Temperature Range ................................. -65 TO 150
°
C
Operating Junction Temperature ............................... O TO 150
°
C
PACKAGE INFORMATION
7 PIN PLASTIC TO220 (T)
FRONT VIEW
7
6
5
4
3
2
1
7 PIN PLASTIC TO263 (M)
FRONT VIEW
7
6
5
4
3
2
1
V5
Vout
Vhyst
Gnd
Vfb
V12
Drv
V5
Vout
Vhyst
Gnd
Vfb
V12
Drv
θ
JT
=2.7°C/W
θ
JA
=60°C/W
θ
JA
=35°C/W for 1" Square pad
ELECTRICAL SPECIFICATIONS
LDO Section
PARAMETER
Output Voltage
Line Regulation
Load Regulation (note 1)
Maximum Output Current
Thermal Regulation
Ripple Rejection
Unless otherwise specified the following specification applies over,V5=5V,V12=12V,and Tj=0 to 125
°
C.Low duty
cycle pulse testing are used which keeps junction and case temperatures equal to the ambient temperature.
SYM TEST CONDITION
V
OUT
Io=0mA
Io=0mA, 4.75<V5<6V
0A<Io<7.5A
I
MAX
d
Vo
=0.995*V
OUT
30 mS Pulse,V5=5V
f=120HZ ,Co=25uF Tan
Io=1A
MIN
TYP
3.400
MAX
0.2
0.5
7.5
0.01
70
0.02
UNITS
V
%
%
A
%/W
dB
Switching Controller Section
PARAMETER
F.B Voltage Initial Accuracy
F.B Voltage Total Variation
F.B Input Bias Current
Min On Time
Min Off Time
Vhyst pin output-HI
Vhyst pin output-LO
Supply Current
Maximum Duty Cycle
Minimum Duty Cycle
Gate Drive Rise/Fall Time
SYM
Vfb
Vfb
Ifb
TEST CONDITION
T
J
=25°C
Includes Temp & line,4.75 to 5.25V
Vfb=1.25V
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
Icc
Vfb=1V
Dmax Vfb=1V
Dmin Vfb=1.5V
Vgate Load=IRL3303
MIN
1.237
1.225
-2
400
400
11
1
10
100
0
70
TYP
1.250
1.250
600
600
MAX
1.262
1.275
+2
800
800
UNITS
V
V
uA
nS
nS
V
V
mA
%
%
nS
4-2
Rev. 1.2
4/26/98
UNISEM [ UNISEM ]
