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)
7 PIN PLASTIC TO263 (M)
FRONT VIEW
FRONT VIEW
7
6
5
4
3
2
1
7
6
5
4
3
2
1
V5
V5
Vout
Vhyst
Gnd
Vout
Vhyst
Gnd
Vfb
V12
Drv
Vfb
V12
Drv
qJT=2.7°C/W qJA=60°C/W
qJA=35°C/W for 1" Square pad
ELECTRICAL SPECIFICATIONS
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.
LDO Section
PARAMETER
SYM TEST CONDITION
MIN TYP
MAX UNITS
Output Voltage
VOUT Io=0mA
3.400
V
Line Regulation
Io=0mA, 4.75<V5<6V
0A<Io<7.5A
dVo=0.995*VOUT
30 mS Pulse,V5=5V
f=120HZ ,Co=25uF Tan
Io=1A
0.2
0.5
%
%
A
%/W
dB
Load Regulation (note 1)
Maximum Output Current
Thermal Regulation
Ripple Rejection
IMAX
7.5
0.01
70
0.02
Switching Controller Section
PARAMETER
SYM TEST CONDITION
MIN TYP
1.237 1.250 1.262
Includes Temp & line,4.75 to 5.25V 1.225 1.250 1.275
MAX UNITS
F.B Voltage Initial Accuracy
F.B Voltage Total Variation
F.B Input Bias Current
Min On Time
Vfb
Vfb
Ifb
TJ=25°C
V
V
uA
nS
Vfb=1.25V
-2
+2
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
400
600
600
800
Min Off Time
400
11
800
nS
Vhyst pin output-HI
Vhyst pin output-LO
Supply Current
V
V
mA
%
%
nS
1
Icc
10
70
Maximum Duty Cycle
Minimum Duty Cycle
Gate Drive Rise/Fall Time
Dmax Vfb=1V
Dmin Vfb=1.5V
Vgate Load=IRL3303
100
0
Rev. 1.2
4/26/98
4-2
UNISEM [ UNISEM ]
