US1150
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) ........................................................... 7V
Control Input Voltage (Vctrl) .................................................. 14V
Power Dissipation............................................. Internally Limited
Storage Temperature Range ................................... -65°C TO 150°C
Operating Junction Temperature Range ..................... 0°C TO 150°C
PACKAGE INFORMATION
8 PIN PLASTIC SOIC ( S )
5 PIN PLASTIC TO263 ( M )
5 PIN PLASTIC POWER FLEX (P)
FRONT VIEW
FRONT VIEW
TOP VIEW
5
5
Vin
Vin
1
2
3
4
8
7
6
5
Vctrl
Vin
Vout
Vout
Vout
Vout
4
4
Vctrl
Vctrl
3
3
Vout
Vout
Adj
2
2
Adj
Adj
Vsense
1
1
Vsense
Vsense
qJA=55°C/W for 1" Sq pad area
qJA=35°C/W for 0.5" square pad
qJA=35°C/W for 0.5" square pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified ,these specifications apply over ,Cin=1uF,Cout=10uF, and Tj=0 to 125°C.Typical
values refer to Tj=25°C. Vout=Vsense.
PARAMETER
Reference Voltage
SYM TEST CONDITION
Vref Vctrl=2.75V,Vin=2V,Io=10mA
Tj=25,Vadj=0V
MIN
TYP
MAX UNITS
1.243 1.250 1.257
V
Vctrl=2.7to12V,Vin=2.05V to 5.5V, 1.237 1.250 1.263
Io=10mA to 4A,Vadj=0V
Line Regulation
Vctrl=2.5Vto7V,Vin=1.75Vto5.5V
,Io=10mA ,Vadj=0V
Vctrl=2.75V,Vin=2.1V,Io=10mA
to 4A,Vadj=0V
Vadj=0V for all conditions below.
Vin=2.05V,Io=1.5A
Vin=2.05V,Io=3A
3
5
mV
mV
V
Load Regulation (note 1)
Dropout Voltage (note 2)
(Vctrl - Vout)
1.15
1.18
1.25
Vin=2.05V,Io=4A
1.10
Dropout Voltage (note 2)
(Vin - Vout)
Vadj=0V for all conditions below.
Vctrl=2.75V,Io=1.5A
Vctrl=2.75V,Io=3A
0.26
0.50
0.70
0.38
0.60
0.85
V
Vctrl=2.75V,Io=4A
Current Limit
Vctrl=2.75V,Vin=2.05V,
dVo=100mV Vadj=0V
4.2
60
A
Minimum Load Current (note 3)
Thermal Regulation
Ripple Rejection
Vctrl=5V,Vin=3.3V,Vadj=0V,
30 mS Pulse
Vctrl=5V,Vin=5V,Io=4A,Vadj=0V
Tj=25,Vripple=1Vpp at 120Hz
5
0.01
70
10
0.02
mA
%/W
dB
Rev. 1.2
10/28/99
2-2
UNISEM [ UNISEM ]
