Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR1112
Preliminary
LINEAR INTEGRATED CIRCUIT
150mA, LOW QUIESCENT
CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR
REGULATOR

DESCRIPTION
The UTC LR1112 is a CMOS-based 150mA voltage regulator
with low supply current, low dropout, adjustable and fixed output
voltage, The device consists of pass element, error amplifier,
band-gap, current limit and thermal shutdown circuitry. The
device is turned on when EN pin is set to logic high level.

FEATURES
* 150mA low dropout regulator with EN
* Very low IQ over full load: 30µA
* Wide input voltage range: 2.5~6V
* Wide adjustable output: 0.8V~5.0V
* Fixed output options: 1.0V~3.3V
* Fast start-up time: 80µs
* PSRR: 65dB at 100Hz
* Stable with low ESR, 1µF ceramic output capacitor
* Low dropout: 150mV typical at 150mA
* Excellent Load/Line Transient Response
* Current limit protection
* Ambient temperature range: -40ºC~85°C

ORDERING INFORMATION
Note:
Ordering Number
LR1112G-xx-AE5-R
xx: Output Voltage, refer to Marking Information.
LR1112G-xx-AE5-R
Package
SOT-23-5
(1)Packing Type
(1) R: Tape Reel
(2)Package Type
(2) AE5: SOT-23-5
(3)Output Voltage Code
(3) xx: refer to Marking Information
(4)Green Package
(4) G: Halogen Free and Lead Free
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Copyright © 2015 Unisonic Technologies Co., Ltd
Packing
Tape Reel
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LR1112

Preliminary
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-23-5
AD: ADJ

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO.
Fixed
ADJ
1
1
2
2
3
3
4
4
5
5
PIN NAME
VIN
GND
EN
ADJ
NC
VOUT
MARKING
DESCRIPTION
Voltage input pin. Bypass to ground through at least 1µF capacitor
Ground
Enable input, active high
Output feedback pin
No connection
Voltage output pin. Bypass to ground through 1µF ceramic capacitor
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LR1112

Preliminary
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
Fixed Version
Adjustable Version
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LR1112

Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
7
V
EN Voltage
VIN+0.3
V
Continuous Load Current
Internal Limited
Power Dissipation (Note 1)
PD
640
mW
Operating Junction Temperature Range
TOPR
-40~125
°C
Junction Temperature
TJ
150
°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.

RECOMMENDED OPERATING CONDITIONS
PARAMETER
Input Voltage
Output Current (Note 2)
Operating Ambient Temperature

SYMBOL
VIN
IOUT
TA
MIN
2.5
0
-40
TYP
MAX
6
150
85
UNIT
V
mA
°C
THERMAL RESISTANCES CHARACTERISTICS
PARAMETER
SYMBOL
RATINGS
UNIT
Junction to Ambient
θJA
260
°C/W
Note: θJA is measured in the natural convection at TA=25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
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LR1112
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Preliminary
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(TA=25°C, VIN=VOUT+1V, CIN=1μF, COUT=1μF, VEN=2V, unless otherwise stated)
PARAMETER
Input Quiescent Current
Input Shutdown Current
Input Leakage Current
Dropout Voltage (Note 3)
ADJ Reference Voltage (Adjustable
Version)
ADJ Leakage (Adjustable Version)
Output Voltage Accuracy
Line Regulation
Load Regulation
Start-Up Time
PSRR
SYMBOL
IQ
ISHDN
ILEAK
VDropout
VREF
MIN
TYP
30
50
150
IOUT=0mA
VOUT
∆VOUT
/∆VIN/V
∆VOUT
/VOUT
tST
ILIMIT
TA=-40°C~85°C,
IOUT=30mA
VIN=(VOUT +1V)~VIN-Max,
VEN=VIN, IOUT=1mA
VIN=(VOUT +1V)~VIN-Max,
IOUT from 1mA to 150mA
VEN=0V~2.0V, VOUT=1.8V
IOUT=150mA
VIN=[VOUT +1V]VDC+0.5VppAC,
f =100Hz, IOUT=30mA
VIN=(VOUT +1V)~VIN-Max,
VOUT/ROUT=0.5A
VIN=VIN-Min ~VIN-Max
VIN=VIN-Min ~VIN-Max
MAX
50
85
1
1
300
0.4
IADJ
PSRR
Current Limit
TEST CONDITIONS
VEN=VIN, IOUT=0mA
VEN=VIN, IOUT=150mA
VEN=0V, IOUT=0mA
VEN=0V, OUT grounded
IOUT=150mA
-2
0.01
-0.6
200
UNIT
μA
μA
μA
μA
mV
V
1
μA
2
%
0.20
%/V
0.6
%
80
μs
65
dB
300
mA
EN Input Logic Low Voltage
VIL
0.4
V
EN Input Logic High Voltage
VIH
1.4
V
Thermal Shutdown Threshold
TSHDN
140
°C
Thermal Shutdown Hysteresis
THYS
15
°C
Notes: 1. Ratings apply to ambient temperature at 25°C
2. The device maintains a stable, regulated output voltage without a load current.
3. Dropout voltage is the voltage difference between the input and the output at which the output voltage
drops 2% below its nominal value. This parameter only applies to output voltages above 1.8V.
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LR1112

Preliminary
LINEAR INTEGRATED CIRCUIT
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.
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www.unisonic.com.tw
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