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UNISEM

US1010 Datasheet Preview

US1010 Datasheet

1A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

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US1010
FEATURES
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 , Power Flex
and 8 pin SOIC Surface Mount Packages
APPLICATIONS
VGA & Sound Card Applications
Low Voltage High Speed Termination Applications
Standard 3.3V Chip-Set and Logic Applications
1A LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
PRELIMINARY DATASHEET
DESCRIPTION
The US1010 is a low dropout three terminal adjustable
regulator with minimum of 1A output current capability.
This product is specifically designed to provide well regu-
lated supply for low voltage IC applications such as high
speed bus termination and low current 3.3V logic
supply. The US1010 is also well suited for other appli-
cations such as VGA and sound cards. The US 1010 is
guaranteed to have <1.3V drop out at full load cur-
rent making it ideal to provide well regulated outputs of
2.5V to 3.6V with 4.75V to 7V input supply.
TYPICAL APPLICATION
D1
5V
C1
10uF
Vin 3
US1010
Vout 2
Adj 1
1010app1-1.4
2.85V / 1A
R1
121
C2
R2 22uF
154
Typical Application of US1010 in a 5V to 2.85V SCSI termination regulator .
PACKAGE ORDER INFORMATION
Tj (°C)
0 TO 150
2 PIN PLASTIC
TO252 (D)
US1010CD
3 PIN PLASTIC 2 PIN PLASTIC
SOT223 (Y) POWER FLEX (P)
US1010CY
US1010CP
8 PIN PLASTIC
SOIC (S)
US1010CS
Rev. 1.3
10/30/00
2-1




UNISEM

US1010 Datasheet Preview

US1010 Datasheet

1A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

No Preview Available !

US1010
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 ) 3 PIN PLASTIC SOT223 ( Y )
FRONT VIEW
3
Tab is 4
Vout
1
TOP VIEW
Vin 3 Vin
Tab is
Vout
Adj
2 Vout
1 Adj
θJA=70°C/W for 0.5" Sq pad θJA=90°C/W for 0.4" Sq pad
2 PIN PLASTIC PFLEX ( P )
FRONT VIEW
Tab is
Vout
3
4
Vin
1 Adj
θJA=70°C/W for 0.5" Sq pad
8 PIN PLASTIC SOIC (S)
TOP VIEW
Vin 1
8 Vout
NC 2
7 Vout
NC 3
6 Vout
Adj 4
5 Vout
θJA=55°C/W for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over, Cin=1uF, Cout=10uF, and Tj=0 to 150°C.Typical
values refer to Tj=25°C.
PARAMETER
Reference Voltage
Line Regulation
Load Regulation (note 1)
Dropout Voltage
(note 2)
Current Limit
Minimum Load Current
(note 3)
Thermal Regulation
Ripple Rejection
Adjust Pin Current
Adjust Pin Current Change
Temperature Stability
Long Term Stability
RMS Output Noise
SYM
VREF
TEST CONDITION
Io=10mA,Tj=25°C,(Vin-Vo)=1.5V
Io=10mA, (Vin-Vo)=1.5V
Io=10mA,1.3V<(Vin-Vo)<7V
Vin=3.3V,Vadj=0,10mA<Io<1A
MIN
1.243
1.237
TYP
1.250
1.250
MAX
1.257
1.263
0.2
0.4
UNITS
V
%
%
VO Note 2 , Io=1A
Vin=3.3V,dVo=100mV
Vin=3.3V,Vadj=0V
1.1 1.3
V
1.1 A
5 10 mA
30 mS PULSE,Vin-Vo=3V,Io=1A
f=120HZ ,Co=25uF Tan
Io=0.5A,Vin-Vo=3V
IADJ Io=10mA,Vin-Vo=1.5V,Tj=25
Io=10mA,Vin-Vo=1.5V
Io=10mA,Vin-Vo=1.5V,Tj=25
Vin=3.3V,Vadj=0V,Io=10mA
Tj=125°C,1000 Hrs
Tj=25°C 10hz<f<10khz
0.01 0.02 %/W
60 70
dB
55
0.2
0.5
0.3
0.003
120
5
1
uA
uA
%
%
%Vo
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.
2-2
Rev. 1.3
10/30/00


Part Number US1010
Description 1A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
Maker UNISEM
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US1010 Datasheet PDF






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