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
FRONT VIEW
7
6
5
4
3
2
1
7 PIN PLASTIC TO263
FRONT VIEW
7
6
5
4
3
2
1
7 PIN POWER FLEX (P)
FRONT VIEW
7
6
5
4
3
2
1
Vout1
Vin
Vout2
Gnd
Vfb2
Vfb1
Vctrl
M7
Vout1
Vin
Vout2
Gnd
Vfb2
Vfb1
Vctrl
Vout1
Vin
Vout2
Gnd
Vfb2
Vfb1
Vctrl
θ
JT
=2.7°C/W
θ
JA
=60°C/W
θ
JA
=30°C/W for 1"sq pad
θ
JA
=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
Vctrl Input Voltage
Reference Voltage
Line Regulation
Load Regulation (note 1)
Dropout Voltage (output #2)
(Note 2)
Dropout Voltage (output #1)
(Note 2)
Current Limit (output #2)
Current Limit (output #1)
Thermal Regulation
Ripple Rejection
SYM
Vref
TEST CONDITION
MIN
TYP
3.0
Io=10mA,Tj=25°C
1.188 1.200
Io=10mA
1.176 1.200
Io=10mA,Vout+1.3V<Vin=Vctrl<7V
0.2
10mA<Io<Ifl
0.4
Io=4A, Vctrl=4.75V , Vin=3.3V
Io=3A, Vctrl=4.75V , Vin=3.3V
Io=2A, Vctrl=4.75V , Vin=3.3V
0.35
Io=1A, Vctrl=4.75V , Vin=3.3V
0.4
Io=1A, Vctrl=Vin=4.75V
dVo=100mV
6.1
dVo=100mV
1.1
30 mS pulse,Io=Ifl
0.01
f=120HZ ,Co=25uF Tantalum
Io=0.5*Ifl
70
Io=10mA
0.02
Io=10mA
0.5
Ta=125°C,1000 Hrs
0.3
Ta=25°C 10hz<f<10khz
0.003
5
MAX
1.212
1.224
UNITS
V
V
%
%
V
V
V
A
A
%/W
dB
uA
%
%
%Vo
mA
1.0
0.7
0.5
0.6
1.3
I
CL2
I
CL1
0.02
Feedback Pin Input Current
Ifb
Temperature Stability
Long Term Stability
RMS Output Noise
Minimum Load Current(Note 3)
1
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.
3-2
Rev. 1.9
3/22/99
UNISEM [ UNISEM ]
