UNISONIC TECHNOLOGIES CO., LTD
L1183B
300mA CMOS LDO
DESCRIPTION
5
4
CMOS IC
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.
6
1
2
3
SOT-26
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
Package
SOT-26
Packing
Tape Reel
Lead Free
Halogen Free
L1183BG-xx-AG6-R
L1183BG-xx-AG6-R
Note: xx: Output Voltage, refer to Marking Information.
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Copyright © 2013 Unisonic Technologies Co., Ltd
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QW-R502-422.C
L1183B
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
12 :1.2V
15 :1.5V
28 :2.8V
31 :3.1V
33 :3.3V
6 5
4
G: Halogen Free
SXXBG
1
2
3
L: Lead Free
CMOS IC
MARKING
SOT-26
Voltage
Code
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
PIN NAME
V
IN
GND
EN
PG
ADJ
V
OUT
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
OUT
-
+
-
AMP
+
ADJ
+
-
V
REF
×90%
V
ref
=1.2V
GND
V
REF
×110%
PG
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QW-R502-422.C
L1183B
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
V
IN
CMOS IC
RATINGS
UNIT
Input Voltage
8
V
Input, Output Voltage
GND - 0.3 ~ V
IN
+ 0.3
V
Output Current
I
OUT
P
D
/ (V
IN
- V
OUT
)
mA
Power Dissipation
P
D
400
mW
Operating Temperature
T
OPR
-40 ~ +85
°C
Junction Temperature
T
J
-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
SYMBOL
θ
JA
θ
JC
SYMBOL
V
IN
V
OUT
V
D
I
OUT
I
LIMIT
I
SC
I
Q
I
GND
REG
LINE
REG
LOAD
OTS
OTH
TC
PSRR
e
N
I
ADJ
V
REF
V
EH
V
EL
I
EH
I
EL
I
SD
V
OUT,SD
V
UV
V
OV
I
LC
V
PG
V
OL
RATINGS
280
140
TEST CONDITIONS
I
OUT
=1mA
I
OUT
=300mA
V
OUT
=V
ONOM
-2.0%
1.2V≤V
O(NOM)
≤2.0V
2.0V<V
O(NOM)
≤2.8V
2.8V<V
O(NOM)
<3.8V
300
300
MIN
Note
-3
TYP MAX
7
3
1300
400
300
UNIT
°C/W
PARAMETER
Junction to Ambient
Junction to Case
PARAMETER
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
V
O
Temperature Coefficient
Power Supply Rejection
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: V
IN(MIN)
=V
OUT
+V
D
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C, V
IN
=5V unless otherwise specified)
UNIT
V
%
mV
V
OUT
>1.2V
V
OUT
>1.2V
V
OUT
<0.8V
I
OUT
=0mA
I
OUT
=1mA ~ 300mA
I
OUT
=5mA
V
IN
=V
O
+1 ~ V
O
+2
I
OUT
=1mA ~ 300mA
V
OUT
< 2.0V
V
OUT
≥
2.0V
I
OUT
=100mA
C
O
=2.2μF
f=10Hz ~ 100kHz
I
O
=10mA,C
BYP
=0μF
f=1kHz
f=10kHz
f=100kHz
C
O
=2.2μF
1.176
2.0
0
mA
450
mA
150 300
mA
30
50
μA
35
μA
0.15
%
0.02 0.1
%
0.2
1
%
150
°C
30
°C
30
ppm/°C
50
dB
20
15
30
μVrms
V
IN
=2.7V ~ 7V
V
IN
=2.7V ~ 7V
V
EN
=V
IN
, V
IN
=2.7V ~ 7V
V
EN
=0V, V
IN
=2.7V ~ 7V
V
IN
=5V, V
O
=0V, V
EN
<V
EL
I
O
=35μA,V
EN
<V
EL
0
115
V
PG
=7V
V
O
in regulation
I
SINK
=0.4mA
1
μA
1.2 1.224
V
V
IN
V
0.4
V
0.1
μA
0.5
μA
0.5
1
μA
0.1
V
85 %V
O(NOM)
%V
O(NOM)
1
μA
7
V
0.4
V
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www.unisonic.com.tw
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QW-R502-422.C
L1183B
ADVANCED APPLICATION
V
IN
=3.3V
CMOS IC
100K
V
IN
PG
100µ
V
OUT
1µ
100
V
O
=1.2V
EN
GND
ADJ
100µ
10K
TYPICAL APPLICATION CIRCUIT
EN
IN
EN
IN
PG
GND
OUT
R1
ADJ
C2
100p
OUT
+
5V
C1
1µF
C3
2.2µF
R2
V
OUT
= 1.2 (R1 +R2)/R2
C2 is unnecessary when R1 or R2 < 20K
PG pin is only available in the SOT-26 package option
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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