UTC LR1801G-18-SH2-R 1a fast ultra low dropout linear regulator Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR1801
Preliminary
CMOS IC
1A FAST ULTRA LOW
DROPOUT LINEAR
REGULATOR

DESCRIPTION
The UTC LR1801 operate from a +2V ~ +6V input supply as
fast ultra low-dropout linear regulators. Wide output voltage range
options are available. The fast response characteristic to make
UTC LR1801 suitable for low voltage microprocessor application.
The low quiescent current operation and low dropout quality
caused by the CMOS process.
The UTC LR1801 has ultra low dropout voltage
300mV at 1A load current typically. The ground pin current is
typically 60uA at 1mA load current.
Output Voltage Precision: Multiple output voltage options are
available and ranging from 1.2V ~ 3.5V at room temperature with a
guaranteed accuracy of ±1.5%, and ±3.0% when varying line, load
and temperature.

FEATURES
* Ultra Low Dropout Voltage
* Low Ground Pin Current
* The Guaranteed Output Current is 1A DC
* Output Voltage Accuracy ± 1.5%
* Over temperature Protection And Over current Protection

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
LR1801L-xx-SH2-T
LR1801G-xx-SH2-T
LR1801L-xx-SH2-R
LR1801G-xx-SH2-R
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Copyright © 2013 Unisonic Technologies Co., Ltd
Package
Packing
HSOP-8
HSOP-8
Tube
Tape Reel
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LR1801
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Preliminary
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
HSOP-8
12: 1.2V
15 : 1.5V
18: 1.8V
25: 2.5V
33: 3.3V

CMOS IC
MARKING
PIN CONFIGURATION
VOUT
1
ON/ OFF
2
8
VIN
7
NC
GND

NC
3
6
NC
GND
4
5
NC
PIN DESCRIPTION
PIN NO.
1
PIN NAME
VOUT
2
ON /OFF
PIN DESCRIPTION
Output voltage
ON/OFF select pin, when connected to the ground the chip in operating normally.
3, 5,6,7
NC
No connection
4
GND
GND
8
VIN
Input voltage
Note: The NC pin is electrically open.
The NC pin can be connected to VIN or GND.

BLOCK DIAGRAM
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LR1801
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Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
7
V
Shutdown Input Voltage
VIN(SHDN)
-0.3~VIN
V
Maximum Operating Current (DC)
1
A
Power Dissipation (Note 3)
PD
Internally Limited
Junction Temperature
TJ
+125
°C
Storage Temperature
TSTG
-65 ~ +150
°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.

THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case

SYMBOL
θJA
θJC
RATINGS
143
45
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS (TJ = 25°C, unless otherwise specified.)
PARAMETER
Input Voltage
Output Voltage (Note 4)
Output Voltage Line
Regulation
Output Voltage Load
Regulation
SYMBOL
VIN
VOUT(E)
TEST CONDITIONS
VIN=VOUT(S)+1V
IOUT=100mA
△VOUT2
IOUT=1000mA
Output Current(Note 6)
IOUT
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0.05
0.2
%/V
-3
20
mV
0.34
0.10
0.07
0.70
0.40
0.32
0.23
0.38
0.15
0.10
VOUT(S)
VOUT(S)
x 0.99
-20
1.2V≤VOUT(S)<1.5V
1.5V≤VOUT(S)<2.6V
2.6V≤VOUT(S) ≤3.5V
1.2V≤VOUT(S)<1.5V
1.5V≤VOUT(S)<2.0V
2.0V≤VOUT(S)<2.6V
2.6V≤VOUT(S) ≤3.5V
VIN≥VOUT(S)+1V
V
V
V
1000
mA
(Note 8)
ISS1
UNISONIC TECHNOLOGIES CO., LTD
UNIT
V
1.5V≤VOUT(S) ≤3.5V
VIN=VOUT(S)+1V, ON/OFF pin=ON, No
Load
VIN=VOUT(S)+1V, ON/OFF pin=OFF,
ISS2
No Load
VIN=VOUT(S)+1V, ON/OFF pin=ON,
Short Circuit Current
ISC
VOUT=0V
Output Voltage Temperature
△VOUT/ VIN=VOUT(S)+1V,IOUT=100mA,
Coefficient(Note 7)
(△TA×VOUT) -40°C ≤ TA≤+85°C
ON/OFF Pin Input Voltage “H”
VSH
VIN=VOUT(S)+1V, RL=1.0KΩ
Determinied by VOUT output level
ON/OFF Pin Input Voltage “L”
VSL
Ground Pin Current In Normal
Operation Mode
Ground Pin Current In
Power-off Mode
MAX
6
VOUT(S)
+
0.015
VOUT(S)
x 1.01
VOUT(S)VOUT(S)
0.015
VIN=VOUT(S)+1V,1mA≤IOUT≤300mA
Vdrop
TYP
1.0V≤VOUT(S)<1.5V
△VOUT1/
VOUT(S)+0.5V≤VIN≤5.5V,IOUT=100mA
(△VIN×VOUT)
IOUT=300mA
Dropout Voltage(Note 5)
MIN
2
60
90
uA
0.1
1.0
uA
200
mA
±100
ppm/°C
1.0
0.3
V
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Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
ON/OFF Pin Input Current “H”
ON/OFF Pin Input Current “L”
Ripple Rejection
SYMBOL
ISH
ISL
|RR|
TEST CONDITIONS
VIN=VOUT(S)+1V,VON/OFF=5.5V
VIN=VOUT(S)+1V,VON/OFF=0V
VIN=VOUT(S)+1V, 1.2V≤VOUT(S)<3.0V
f=1khz,
△Vrip=0.5Vrms, 3.0V≤VOUT(S) ≤3.5V
IOUT=100mA
MIN
-0.1
-0.1
TYP
MAX
0.1
0.1
UNIT
uA
uA
65
60
dB
Thermal Shutdown detection
TSD
Junction temperature
150
°C
temperature
Thermal Shutdown release
TSR
Junction temperature
120
°C
temperature
Notes: 1. The LR1801 output must be diode-clamped to ground. If used in a dual-supply system where the regulator
load is returned to a negative supply.
2. Between the VIN and VOUT terminals the output PMOS structure contains a diode. This diode is reverse
biased normally. If the voltage at the output terminal is forced to be higher than the voltage at the input
terminal this diode will get forward biased. This diode can withstand 1Amp of peak current and 200mA of
DC current typically.
3. Devices must be derated based on package thermal resistance at elevated temperatures.
4. VOUT(S): Specified output voltage
VOUT(E): Actual output voltage
Output voltage when fixing IOUT(=100ma) and inputting VOUT(S)+1.0V
5. Vdrop=VIN1-(VOUT3×0.98)
VOUT3 is the output voltage when VIN=VOUT(S)+1.0V and IOUT=300mA, 1000mA.
6. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the
output current.
7.The change in temperature [mV/°C] is calculated using the following equation.
VOUT
VOUT
mV / C   VOUT ( S ) V  
 ppm / C   1000
TA 
TA  VOUT 
8.The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be
paid to the power dissipation of the package when the output current is large.
This specification is guaranteed by design.
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LR1801

Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
(1) ON/OFF pins must be pulled high through a 10kΩ pull-up resistor.
(2) Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for this IC. However, be sure to perform sufficient evaluation under the actual
usage conditions for selection, including evaluation of temperature characteristics.
Input capacitor (CIN): 2.2μF or more
Output capacitor (CL): 2.2μF or more
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.
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www.unisonic.com.tw
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