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UNISONIC TECHNOLOGIES CO., LTD
L1183B
300mA CMOS LDO
CMOS IC
DESCRIPTION
The UTC L1183B is a positive, linear regulator. One of the feature
is the very low ground current typically as low as 30μA, and the
dropout voltage is extremely low. For stable operation, the output
capacitance value should be 2.2μF or more.
The internal circuit includes thermal shutdown and current
fold-back device to prevent device failure when the circuit is
operated in bad conditions.
The UTC L1183B is generally suitable for applications, such as
instrumentation, portable electronics, wireless devices, cordless
phones, PC peripherals, battery powered widgets.
FEATURES
* Very Low Dropout Voltage
* Guaranteed Output Current: 300mA
* Quiescent Current: 30μA (TYP.)
* Typical Accuracy Within 2%
* Over-Temperature Shutdown
* Current Limiting
* Short Circuit Current Fold-Back
* Power Good Detector (6 pin version only)
* Power-Saving Shutdown Mode
* Adjustable Output Voltages
* Low Temperature Coefficient
* RoHS-Compliant Product
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
L1183BG-xx-AG6-R
L1183BG-xx-AG6-R
Note: xx: Output Voltage, refer to Marking Information.
54
6
23
1
SOT-26
Package
SOT-26
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
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L1183B
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-26
12 :1.2V
15 :1.5V
28 :2.8V
31 :3.1V
33 :3.3V
PIN CONFIGURATION
654
SXXBG
123
MARKING
G: Halogen Free
L: Lead Free
Voltage Code
CMOS IC
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
PIN NAME
VIN
GND
EN
PG
ADJ
VOUT
DESCRIPTION
Input voltage pin
Ground connection pin
Enable pin
Power-Good output
Feedback output voltage for adjustable device
LDO voltage regulator output pin
BLOCK DIAGRAM
IN
Thermal
Shutdown
Overcurrent
Shutdown
EN
VREF×110%
PG +-
+-
VREF×90%
-
AMP
+
Vref=1.2V
OUT
ADJ
GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1183B
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN 8 V
Input, Output Voltage
GND - 0.3 ~ VIN + 0.3
V
Output Current
IOUT
PD / (VIN - VOUT)
mA
Power Dissipation
PD 400 mW
Operating Temperature
TOPR
-40 ~ +85
°C
Junction Temperature
TJ
-40 ~ +125
°C
Notes: 1. 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.
2. Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
Junction to Ambient
Junction to Case
θJA
θJC
280
140
°C/W
ELECTRICAL CHARACTERISTICS (TA = 25°C, VIN=5V unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Input Voltage
Output Voltage
Dropout Voltage
Output Current
Current Limit
Short Circuit Current
Quiescent Current
Ground Pin Current
Line Regulation
Load Regulation
Over Temperature Shutdown
Over Temperature Hysterisis
VIN
VOUT
VD
IOUT
ILIMIT
ISC
IQ
IGND
REGLINE
REGLOAD
OTS
OTH
IOUT=1mA
IOUT=300mA
1.2VVO(NOM) 2.0V
VOUT=VONOM
2.0V<VO(NOM) 2.8V
-2.0%
2.8V<VO(NOM)<3.8V
VOUT>1.2V
VOUT>1.2V
VOUT<0.8V
IOUT=0mA
IOUT=1mA ~ 300mA
IOUT=5mA
VOUT < 2.0V
VIN=VO+1 ~ VO+2 VOUT 2.0V
IOUT=1mA ~ 300mA
Note
-3
300
300
7
3
1300
400
300
450
150 300
30 50
35
0.15
0.02 0.1
0.2 1
150
30
V
%
mV
mA
mA
mA
μA
μA
%
%
%
°C
°C
VO Temperature Coefficient
Power Supply Rejection
TC
PSRR
IOUT=100mA
CO=2.2μF
f=1kHz
f=10kHz
f=100kHz
30 ppm/°C
50
20 dB
15
Output Voltage Noise
ADJ Input Bias Current
ADJ Reference Voltage
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Output Voltage
Output Under Voltage
Output Over Voltage
PG Leakage Current
PG Voltage Rating
PG Voltage Low
Note: VIN(MIN)=VOUT+VD
eN
IADJ
VREF
VEH
VEL
IEH
IEL
ISD
VOUT,SD
VUV
VOV
ILC
VPG
VOL
f=10Hz ~ 100kHz
IO=10mA,CBYP=0μF
CO=2.2μF
VIN=2.7V ~ 7V
VIN=2.7V ~ 7V
VEN=VIN, VIN=2.7V ~ 7V
VEN=0V, VIN=2.7V ~ 7V
VIN=5V, VO=0V, VEN<VEL
IO=35μA,VEN<VEL
VPG=7V
VO in regulation
ISINK=0.4mA
30 μVrms
1.176
2.0
0
0
115
1 μA
1.2 1.224 V
VIN V
0.4 V
0.1 μA
0.5 μA
0.5 1
μA
0.1 V
85 %VO(NOM)
%VO(NOM)
1 μA
7V
0.4 V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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