UNISONIC TECHNOLOGIES CO., LTD
L1183B
300mA CMOS LDO
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.
5
4
Preliminary
CMOS IC
6
1
2
3
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
SOT-26
ORDERING INFORMATION
Ordering Number
Package
L1183BG-xx-AG6-R
SOT-26
Note: xx: Output Voltage, refer to Marking Information.
Packing
Tape Reel
www.unisonic.com.tw
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QW-R502-422.a
L1183B
ABSOLUTE MAXIMUM RATING
PARAMETER
Input Voltage
Input, Output Voltage
Output Current
Power Dissipation
Preliminary
CMOS IC
SYMBOL
V
IN
I
OUT
P
D
RATINGS
8
GND - 0.3 ~ V
IN
+ 0.3
P
D
/ (V
IN
- V
OUT
)
400
UNIT
V
V
mA
mW
Ambient 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
PARAMETER
Junction to Ambient
Junction to Case
SYMBOL
θ
JA
θ
JC
RATINGS
140
280
UNIT
°C/W
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C, V
IN
=5V unless otherwise specified)
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
Note: V
IN(min)
=V
OUT
+V
D
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
eN
I
ADJ
V
REF
V
EH
V
EL
I
EH
I
EL
TEST CONDITIONS
I
OUT
=1mA
1.2V≤V
O(NOM)
≤2.0V
I
OUT
=300mA
V
OUT
=V
ONOM
2.0V<V
O(NOM)
≤2.8V
-2.0%
2.8V<V
O(NOM)
<3.8V
V
OUT
>1.2V
V
OUT
>1.2V
V
OUT
<0.8V
I
OUT
=0mA
I
OUT
=1mA ~ 300mA
I
OUT
=5mA
V
OUT
< 2.0V
V
IN
=V
O
+1 ~ V
O
+2
V
OUT
≥
2.0V
I
OUT
=1mA ~ 300mA
MIN
Note
-3
TYP MAX
7
3
1300
400
300
UNIT
V
%
mV
300
300
I
OUT
=100mA
C
O
=2.2μF
f=10Hz ~ 100kHz
I
O
=10mA,C
BYP
=0μF
f=1kHz
f=10kHz
f=100kHz
Co=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
1
1.2 1.224
VIN
0.4
0.1
0.5
μVrms
μA
V
V
V
μA
μA
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
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www.unisonic.com.tw
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