UNISEM US1010-25CD, US1010-25CY, US1010-25CP Datasheet
FEATURESFEATURES
Guaranteed < 1.3V Dropout at Full Load
Current
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-in Thermal Shutdown
Available in SOT-223 & D-PAK and a new Power
Flex Surface Mount Packages
APPLICATIONSAPPLICATIONS
Low Voltage IC supply Applications
PC Clock Supply Voltage
US1010-25
1A LOW DROPOUT POSITIVE
FIXED OUTPUT REGULATOR
PRELIMINARY DATASHEET
DESCRIPTIONDESCRIPTION
The US1010-25 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 as well
as generating clock supply for the PC applications. The
US 1010 is guaranteed to have <1.3V drop out at
full load current making it ideal to provide well regulated with 3.8V 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
US1010-25
1010-25app1-1.0
Typical Application of US1010-25 in a 5V to 2.5V regulator .
10uF
Vin
Vout
Gnd
C1
3
2
1
PACKAGE ORDER INFORMATIONPACKAGE ORDER INFORMATION
2.5V / 1A
C2
10uF
Tj (°C) 2 PIN PLASTIC 3 PIN PLASTIC 2 PIN PLASTIC
TO252 (D) SOT223 (Y) POWER FLEX (P)
0 TO 150 US1010-25CD US1010-25CY US1010-25CP
Rev. 1.1
10/30/00
2-1
US1010-25
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 )
Tab is
Vout
FRONT VIEW
4
3
Vin
Tab is
1
Gnd
θJA=70°C/W for 0.5" Square pad θJA=90°C/W for 0.4" Square pad θJA=70°C/W for 0.5" Square 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.
Vout
TOP VIEW
FRONT VIEW
3
Vin
2
Vout
1
Gnd
Tab is
Vout
4
3
Vin
1
Gnd
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Output Voltage Vo Io=10mA,Tj=25°C 2.475 2.500 2.525 V
Io=10mA 2.450 2.500 2.550
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. 1.1
10/30/00
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