US1050
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) .................................................................. 7V
Power Dissipation ............................................ Internally Limited
Storage Temperature Range .............................. -65°C TO 150°C
Operating Junction Temperature Range .................. 0°C TO 150°C
PACKAGE INFORMATION
3 PIN PLASTIC TO220 ( T )
3 PIN PLASTIC TO263 ( M ) 2 PIN PLASTIC POWER FLEX ( P ) 3 PIN PLASTIC TO252 ( D )
FRONT VIEW
FRONT VIEW
FRONT VIEW
FRONT VIEW
3
3
2
1
3
Vin
Vin
Vin
3
2
1
Tab is
Vout
Vin
Tab is
Vout
Tab is
Vout
Tab is
Vout
Vout
Adj
4
4
Vout
Adj
1
Adj
1
Adj
qJT=2.7°C/W qJA=60°C/W
qJA=35°C/W for 1" Square pad
qJA=70°C/W for 1" Square pad
qJA=70°C/W for 0.5" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified ,these specifications apply over ,Cin=1uF,Cout=10uF,and Tj=0 to 150°C.Typical
values refer to Tj=25°C.
PARAMETER
SYM TEST CONDITION
MIN
TYP
MAX UNITS
Reference Voltage
VREF
Io=10mA,Tj=25°C,(Vin-Vo)=1.5V 1.243 1.250 1.257
V
Io=10mA, (Vin-Vo)=1.5V
1.237 1.250 1.263
Line Regulation
Load Regulation (note 1)
Dropout Voltage
(note 2)
Current Limit
Minimum Load Current
(note 3)
Io=10mA,1.3V<(Vin-Vo)<7V
Vin=3.3V,Vadj=0,10mA<Io<5A
0.2
0.4
%
%
DVO
Note 2 , Io=5A
Vin=3.3V,dVo=100mV
Vin=3.3V,Vadj=0V
1.1
5
1.3
10
V
A
mA
5.1
60
Thermal Regulation
Ripple Rejection
30 mS PULSE,Vin-Vo=3V,Io=5A
f=120HZ ,Co=25uF Tan
Io=2.5A,Vin-Vo=3V
0.01
70
0.02
%/W
dB
Adjust Pin Current
IADJ
Io=10mA,Vin-Vo=1.5V,Tj=25
Io=10mA,Vin-Vo=1.5V
55
0.2
0.5
120
5
uA
uA
%
Adjust Pin Current Change
Temperature Stability
Io=10mA,Vin-Vo=1.5V,Tj=25
Vin=3.3V,Vadj=0V,Io=10mA
Long Term Stability
RMS Output Noise
Tj=125°C,1000 Hrs
Tj=25°C 10hz<f<10khz
0.3
1
%
0.003
%Vo
Note 1 : Low duty cycle pulse testing with Kelvin con-
nections are required in order to maintain accurate data.
Note 2 : Drop-out voltage is defined as the minimum
differential voltage between Vin and Vout required to main-
tain regulation at Vout. It is measured when the output
voltage drops 1% below its nominal value.
Note 3 : Minimum load current is defined as the mini-
mum current required at the output in order for the out-
put voltage to maintain regulation. Typically the resistor
dividers are selected such that it automatically main-
tains this current.
Rev. 1.3
10/27/00
2-34
UNISEM [ UNISEM ]
