UNISEM US1010-33CY, US1010-33CS, US1010-33CP, US1010-33CD Datasheet
FEATURESFEATURES
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
APPLICATIONSAPPLICATIONS
VGA & Sound Card Applications
Standard 3.3V Chip-Set and Logic Applications
US1010-33
1A LOW DROPOUT POSITIVE
FIXED OUTPUT REGULATOR
PRELIMINARY DATASHEET
DESCRIPTIONDESCRIPTION
The US1010-33 is a low dropout three terminal fixed output regulator with minimum of 1A output current capability. 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 APPLICATIONTYPICAL APPLICATION
5V
US1010-33
1010-33app1-1.0
Typical Application of US1010-33 in a 5V to 3.3V regulator .
10uF
Vin
Vout
Gnd
C1
3
2
1
PACKAGE ORDER INFORMATIONPACKAGE ORDER INFORMATION
3.3V / 1A
C2
10uF
Tj (°C) 2 PIN PLASTIC 3 PIN PLASTIC 2 PIN PLASTIC 8 PIN PLASTIC
TO252 (D) SOT223 (Y) POWER FLEX (P) SOIC (S)
0 TO 150 US1010-33CD US1010-33CY US1010-33CP US1010-33CS
Rev. 1.2
10/30/00
2-1
US1010-33
ABSOLUTE MAXIMUM RATINGSABSOLUTE 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 INFORMATIONPACKAGE INFORMATION
2 PIN PLASTIC TO252 ( D ) 3 PIN PLASTIC SOT223 ( Y ) 2 PIN POWER FLEX ( P ) 3 PIN PLASTIC SOT223 ( Y )
Vin
NC
NC
TOP VIEW
1
2
3
4
8
Vout
7
Vout
6
Vout
5
VoutGnd
Tab is
Vout
FRONT VIEW
4
3
Vin
Tab is
1
Gnd
Vout
TOP VIEW
FRONT VIEW
3
Vin
2
Vout
1
Gnd
Tab is
Vout
4
3
Vin
1
Gnd
θJA=70°C/W for 0.5" Sq pad θJA=90°C/W for 0.4" Sq pad θJA=70°C/W for 0.5" Sq pad θJA=55°C/W for 1" Sq pad
ELECTRICAL SPECIFICATIONSELECTRICAL 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 SYM TEST CONDITION MIN TYP MAX UNITS
Output Voltage Vo Io=10mA,Tj=25°C 3.267 3.300 3.333 V
Io=10mA 3.235 3.300 3.365
Line Regulation Io=10mA,4.75V<Vin<7V 7 mV
Load Regulation (Note 1) 10mA<Io<1A 17 mV
Dropout Voltage (Note 2) Io=1A 1.3 V
Current Limit dVo=100mV 1.1 A
Thermal Regulation 30 mS PULSE, Io=1A 0.01 0.02 %/W
Ripple Rejection f=120HZ ,Co=25uF Tan
Io=0.5A 60 70 dB
Temperature Stability Io=10mA 0.5 %
Long Term Stability Tj=125°C,1000 Hrs 0.3 1 %
RMS Output Noise Tj=25°C 10hz<f<10khz 0.003 %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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