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UNISEM |
US1010-33
FEATURES
Guaranteed < 1.3V Dropout at Full Load
Current
Fast Transient Response
1% Output Voltage Initial Accuracy
Built-in Thermal Shutdown
Available in SOT-223, D-PAK , Power Flex
and 8 pin SOIC Surface Mount Packages
APPLICATIONS
VGA & Sound Card Applications
Standard 3.3V Chip-Set and Logic Applications
1A LOW DROPOUT POSITIVE
FIXED OUTPUT REGULATOR
PRELIMINARY DATASHEET
DESCRIPTION
The US1010-33 is a low dropout three terminal fixed out-
put regulator with minimum of 1A output current capabil-
ity. This product is specifically designed to provide well
regulated supply for low voltage IC applications such as
VGA , sound & DVD cards. The US 1010 is guaran-
teed to have <1.3V drop out at full load current
making it ideal to provide well regulated with 4.75V to
7V input supply. The US1010 is specifically designed to
be stable with low cost Aluminimum capacitors while
still maintains stability with low ESR tantalum caps as
well.
TYPICAL APPLICATION
5V
C1
10uF
Vin 3
US1010-33
Vout 2
Gnd 1
1010-33app1-1.0
C2
10uF
3.3V / 1A
Typical Application of US1010-33 in a 5V to 3.3V regulator .
PACKAGE ORDER INFORMATION
Tj (°C)
0 TO 150
2 PIN PLASTIC
TO252 (D)
US1010-33CD
3 PIN PLASTIC 2 PIN PLASTIC
SOT223 (Y) POWER FLEX (P)
US1010-33CY
US1010-33CP
8 PIN PLASTIC
SOIC (S)
US1010-33CS
Rev. 1.2
10/30/00
2-1
US1010-33
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
2 PIN PLASTIC TO252 ( D )
FRONT VIEW
3
Vin
Tab is 4
Vout
1 Gnd
3 PIN PLASTIC SOT223 ( Y )
Tab is
Vout
TOP VIEW
3 Vin
2 Vout
1 Gnd
θJA=70°C/W for 0.5" Sq pad θJA=90°C/W for 0.4" Sq pad
2 PIN POWER FLEX ( P )
FRONT VIEW
Tab is
Vout
3
4
Vin
1 Gnd
3 PIN PLASTIC SOT223 ( Y )
TOP VIEW
Vin 1
8 Vout
NC 2
7 Vout
NC 3
6 Vout
Gnd 4
5 Vout
θJA=70°C/W for 0.5" Sq pad
θJA=55°C/W for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over, Cin=1uF, Vin=5V,Cout=10uF, and Tj=0 to 125°C.Typical
values refer to Tj=25°C.
PARAMETER
Output Voltage
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
Current Limit
SYM
Vo
TEST CONDITION
Io=10mA,Tj=25°C
Io=10mA
Io=10mA,4.75V<Vin<7V
10mA<Io<1A
Io=1A
dVo=100mV
MIN TYP
3.267 3.300
3.235 3.300
1.1
MAX
3.333
3.365
7
17
1.3
UNITS
V
mV
mV
V
A
Thermal Regulation
Ripple Rejection
30 mS PULSE, Io=1A
f=120HZ ,Co=25uF Tan
Io=0.5A
0.01 0.02 %/W
60 70
dB
Temperature Stability
Long Term Stability
RMS Output Noise
Io=10mA
Tj=125°C,1000 Hrs
Tj=25°C 10hz<f<10khz
0.5
0.3
0.003
1
%
%
%Vo
Note 1 : Low duty cycle pulse testing with Kelvin connections 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 maintain
regulation at Vout. It is measured when the output voltage drops 1% below its nominal value.
2-2
Rev. 1.2
10/30/00
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