Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UR1171
Preliminary
CMOS IC
1.5A LDO REGULATOR

DESCRIPTION
The UTC UR1171 is a typical LDO (linear regulator) with the
features of high output voltage accuracy, low supply current, low
ON-resistance, and high ripple rejection.
During operation of the UTC UR1171, the dropout voltage is
very low and the response of line transient and load transient are
very well.
Internally, there’re many functions of UTC UR1171 which can
be seen in the block figure. There are a voltage reference unit, an
error amplifier, resistor-net for voltage setting, a current limit circuit,
and a chip enable circuit in each UTC UR1171.
The UTC UR1171 can be used as an ideal of the power supply
for hand-held communication equipment, such as: power source for
portable communication equipment, power source for electrical
appliances, for example, cameras, VCRs and camcorders and
power source for battery-powered equipment.

SOP-8
FEATURES
* Low standby current (TYP=0.1µA)
* Supply current (TYP=80µA)
* Output current ([email protected]=VOUT+1.0V)
* Output voltage accuracy (±2.0%)
* Output voltage (1.2V~5.0V)
* Low dropout voltage ([email protected]=3.0V, IOUT=300mA)
* Line regulation (TYP=0.05%/V)
* Low temperature-drift coefficient of output voltage
* Built-in thermal shunt circuit
* Built-in current limit circuit

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UR1171xxL-S08-T
UR1171xxG-S08-T
UR1171xxL-S08-R
UR1171xxG-S08-R
UR1171xxL-S08-T
Package
Packing
SOP-8
SOP-8
Tube
Tape Reel
(1)Packing Type
(1) T: Tube, R: Tape Reel
(2)Package Type
(2) S08: SOP-8
(3)Lead Free
(3) L: Lead Free, G: Halogen Free
(4)Enable Threshold Level
(4) AH: 1.5A/Active High
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Copyright © 2013 Unisonic Technologies Co., Ltd
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QW-R502-A33.a
UR1171
Preliminary

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO.
1
2, 5
3
4, 7, 8
6

PIN NAME
VOUT
GND
CE
NC
VDD
CMOS IC
DESCRIPTION
Output Pin
Ground Pin
Chip Enable Pin
No Connection
Input Pin
BLOCK DIAGRAM
VDD
6
1
VOUT
2
GND
5
GND
+
Vref
Current Limit
and OTP
CE
3
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UR1171

Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
7.0
V
Input Voltage(CE or CE Input Pin)
VCE
-0.3~VIN+0.3
V
Output Voltage
VOUT
-0.3~VIN+0.3
V
Output Current
IOUT
3.5
A
Power Dissipation
PD
606
mW
Operating Temperature
TOPT
-40~85
°C
Storage Temperature
TSTG
-55~125
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified)
UR1171AH
PARAMETER
Input Voltage
Supply Current
Standby Current
Output Voltage
Output Current
Load Regulation
SYMBOL
VIN
ISS
ISTB
VOUT
IOUT
∆VOUT/∆IOUT
Dropout Voltage
1.5≤VOUT<1.6
1.6≤VOUT≤5.0
1.5≤VOUT<4.7
Ripple Rejection
4.7≤VOUT≤5.0
Output Voltage
Temperature Coefficient
Short Current Limit
Pull-down resistance for CE pin
CE Input Voltage “H”
Thermal Shutdown Detector
Threshold Temperature
Thermal Shutdown Released
Temperature
Line Regulation
VDIF
∆VOUT/∆VIN
RR
∆VOUT/∆T
TEST CONDITIONS
VIN-VOUT=1.0V, VCE=VIN
VIN-VOUT=1.0V, VCE=0V
VIN-VOUT=1.0V, IOUT=200mA
x0.98
VIN-VOUT=1.0V
1.5
VIN-VOUT=1.0V, 1mA≤IOUT≤300mA
IOUT=300mA, VOUT=1.5≤VOUT<1.6
IOUT=300mA, VOUT=1.6≤VOUT<1.7
IOUT=300mA, VOUT=1.7≤VOUT<1.8
IOUT=300mA, VOUT=1.8≤VOUT<2.0
IOUT=300mA, VOUT=2.0≤VOUT<2.5
IOUT=300mA, VOUT=2.5≤VOUT≤5.0
IOUT=200mA, VOUT=2.1V≤VIN<6.0V
IOUT=200mA, VOUT+0.5V≤VIN≤6.0V
f=1kHz, Ripple 0.5 VP-P,VIN−VOUT=1.0V
f=1kHz, Ripple 0.5VP-P, VIN=5.75V
10
0.16
0.14
0.13
0.12
0.10
0.09
60
0.35
0.32
0.28
0.24
0.21
0.18
UNIT
V
µA
µA
V
A
mV
V
V
V
V
V
V
0.05
0.30
%/V
IOUT=10mA, -40°C ≤ TA ≤ 85°C
±100
TYP
80
0.1
MAX
6.0
160
2.0
x1.02
50
ppm
/°C
mA
MΩ
V
VOUT=0V
TTSD
Junction Temperature
150
°C
TTSR
Junction Temperature
120
°C
2.5
1.5
200
5.0
dB
ILIM
RPD
VCEH
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
10.0
VIN
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QW-R502-A33.a
UR1171

Preliminary
CMOS IC
TEST CIRCUIT
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QW-R502-A33.a
UR1171

Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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