US1260
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
7 PIN PLASTIC TO220
7 PIN PLASTIC TO263
7 PIN POWER FLEX (P)
FRONT VIEW
FRONT VIEW
FRONT VIEW
7
6
5
4
3
2
1
Vout1
Vin
Vout2
Gnd
Vfb2
Vfb1
Vctrl
7
6
5
4
3
2
1
Vout1
Vin
Vout2
Gnd
Vfb2
Vfb1
Vctrl
7
6
5
4
3
2
1
Vout1
Vin
Vout2
Gnd
Vfb2
Vfb1
Vctrl
M7
qJT =2.7°C/W qJA =60°C/W
qJA =30°C/W for 1"sq pad
qJA =30°C/W for 1"sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified ,these specifications apply over ,Cin=1 uF,Cout=10uF,and Tj=0 to 150°C.Typical
values refer to Tj=25°C. Ifl=6A for output #1,and Ifl=1A for output #2. Vfb=Vo for both outputs.Vctrl=Vin=3.3V.
PARAMETER
SYM TEST CONDITION
MIN
TYP
MAX UNITS
Vctrl Input Voltage
Reference Voltage
3.0
V
V
Vref
Io=10mA,Tj=25°C
1.188 1.200
1.212
Io=10mA
1.176 1.200 1.224
Line Regulation
Load Regulation (note 1)
Dropout Voltage (output #2)
Io=10mA,Vout+1.3V<Vin=Vctrl<7V
10mA<Io<Ifl
0.2
0.4
1.0
0.7
%
%
V
Io=4A, Vctrl=4.75V , Vin=3.3V
Io=3A, Vctrl=4.75V , Vin=3.3V
Io=2A, Vctrl=4.75V , Vin=3.3V
Io=1A, Vctrl=4.75V , Vin=3.3V
Io=1A, Vctrl=Vin=4.75V
dVo=100mV
dVo=100mV
30 mS pulse,Io=Ifl
f=120HZ ,Co=25uF Tantalum
Io=0.5*Ifl
Io=10mA
V
(Note2)
Dropout Voltage (output #1)
(Note2)
Current Limit (output #2)
Current Limit (output #1)
ThermalRegulation
Ripple Rejection
0.35
0.4
0.5
0.6
V
1.3
ICL2
ICL1
6.1
1.1
A
A
%/W
0.01
0.02
70
0.02
0.5
dB
uA
%
Feedback Pin Input Current
Temperature Stability
Ifb
Io=10mA
Long Term Stability
RMS Output Noise
Minimum Load Current(Note 3)
Ta=125°C,1000Hrs
Ta=25°C 10hz<f<10khz
0.3
0.003
5
1
%
%Vo
mA
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.
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.
Rev. 1.9
3/22/99
3-2
UNISEM [ UNISEM ]
