Datasheet

UNISONIC TECHNOLOGIES CO., LTD
L1183A
CMOS IC
300mA CMOS LDO

DESCRIPTION
The UTC L1183A is a COMS positive linear regulator. One of it’s
feature is the very low quiescent current typical as low as 30μA and
its dropout voltage is extremely low with 300mA output current.
The internal circuit includes current fold-back to prevent device
failure when the circuit is operated in the bad conditions.
In application, the UTC L1183A needs a low noise, regulated
supply. For stable operation, the output capacitance value should be
2.2μF or more.
The UTC L1183A is an ideal for battery applications, such as
instrumentations, portable electronics, wireless devices, cordless
phones, PC peripherals, and battery powered widgets.

FEATURES
* Accurate To Within 1.5%
* Quiescent Current: 30μA
* With Current Limiting
* Internal Short Circuit Current Fold-Back
* Has Power-Saving Shutdown Mode
* Very Low Temperature Coefficient

ORDERING INFORMATION
Ordering Number
L1183AG-xx-AF5-R
L1183AG-xx-AG6-R
Note: xx: Output Voltage, refer to Marking Information.
L1183AG-xx-AF5-R
Package
SOT-25
SOT-26
Packing
Tape Reel
Tape Reel
(1) Packing Type
(1) R: Tape Reel
(2) Package Type
(2) AF5: SOT-25, AG6: SOT-26
(3) Output Voltage Code
(3) xx: Refer to Marking Information
(4) Green Package
(4) G: Halogen Free and Lead Free
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QW-R502-315.M
L1183A

CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
15 :1.5V
SOT-25
18:1.8V
4
5
12:1.2V
Voltage Code
25:2.5V
SXXAG
1
28 :2.8V
30: 3.0V
2
6 5
3
4
31 :3.1V
33 :3.3V
SOT-26
Voltage Code
50:5.0V


SXXAG
1
2
3
PIN CONFIGURATION
PIN DESCRIPTION
PACKAGE
SOT-25
SOT-26
PIN NO.
PIN NAME
1
VIN
2
GND
3
EN
4
NC
5
VOUT
1
2
3
4
5
6
SENSE
GND
BYP
EN
VDD
VOUT
DESCRIPTION
Input for voltage input. A 1µF or greater capacitor should be placed in
this pin.
Ground.
Enable pin. Pulling his pin low, can shut down the PMOS pass transistor,
and the current consuming can be set less than 1µA.
Output voltage pin. The capacitor which connected between this pin and
GND should be decoupled with a 2.2µF or a greater value low ESR
ceramic capacitor.
Remote Sense.
Ground.
Bypass capacitor for noise reduction.
Enable Input.
Supply Input.
Output Voltage.
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QW-R502-315.M
L1183A

CMOS IC
BLOCK DIAGRAM
VIN
Overcurrent Shutdown
EN
-
NC
AMP
+
VOUT
R1
VREF=1.215V
R2
GND
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QW-R502-315.M
L1183A

CMOS IC
ABSOLUTE MAXIMUM RATING (Unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
-0.3~ +6.5
V
Input Voltage (EN,BYP)
-0.3~ +6.5
V
Output Voltage
VOUT
-0.3~ VIN+0.3
V
Output Current
IOUT
300
mA
Power Dissipation
PD
400
mW
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
Ambient Temperature
Junction Temperature
Storage Temperature
SYMBOL
TA
TJ
TSTG
RATINGS
- 40 ~ +85
150
-65 ~ +150
UNIT
°C
°C
°C
PARAMETER
SYMBOL
Junction to Ambient
θJA
Junction to Case (Note)
θJC
Note: θJC on center of molding compound if IC has on tab.
RATINGS
280
140
UNIT
°C/W
°C/W

THERMAL DATA
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L1183A

CMOS IC
ELECTRICAL CHARACTERISTICS (TA = 25°C, Unless otherwise specified)
PARAMETER
Input Voltage
Line Regulation
Load Regulation
SYMBOL
VIN
∆VOUT
VOUT
∆VOUT
VOUT
Output Voltage Accuracy
Quiescent Current
Dropout Voltage
Power Supply Ripple Rejection
Output Voltage Noise
Output Current
Current Limit
Short Circuit Current (Note2)
Ground Pin Current
Temperature Coefficient of
Output Voltage
EN Input Threshold
EN Input Bias Current
IQ
VD
PSRR
eN
IOUT
ILIMIT
ISC
IGND
TEST CONDITIONS
VIN=VOUT+1~VOUT+2
IOUT=1mA
1.2V≤VOUT≤1.4V
1.4V<VOUT≤2.0V
2.0V<VOUT<4.0V
VIN=VOUT+1~VOUT+1.5V
VOUT=5.0V
IOUT=1mA
IOUT=1mA~300mA
IOUT=1mA
IOUT=300mA
IOUT=0mA
1.2V≤VO(NOM)≤2.0V
IOUT=300mA
2.4V<VO(NOM)≤2.8V
VOUT=VO(NOM)-2.0%
2.8V<VO(NOM)≤5.0V
f=100Hz
IOUT=100mA
f=1kHz
COUT=2.2µF
f=10kHz
IOUT=10mA,COUT=2.2µF,f=10Hz~100kHz
VOUT>1.2V
VOUT>1.2V
VOUT<0.8V
IOUT=1mA ~300mA
MIN TYP
Note1
-0.2
-0.15
-0.1 0.02
UNIT
V
%
%
%
-0.1
0.02
0.1
%
-2
0.2
2
%
1.5
2.5
50
1300
400
300
%
%
µA
-1.5
-2.5
30
60
50
20
30
300
300
TCVO
VEH
VEL
IEH
IEL
ISD
VSD
MAX
6.5
0.2
0.15
0.1
450
150
35
300
30
VIN=2.7V~6.5V
VIN=2.7V~6.5V
VEN=VIN, VIN=2.7V~6.5V
VEN=0V, VIN=2.7V~6.5V
VIN=6.5V, VO=0V, VEN<VEL
IO=0.4mA, VEN<VEL
2.0
0
mV
dB
dB
dB
µVRMS
mA
mA
mA
µA
ppm/°C
VIN
0.4
2.0
0.5
1
0.4
V
V
µA
µA
µA
V
Shutdown Supply Current
0.5
Shutdown Output Voltage
0
Notes: 1. VIN(MIN) =VOUT +VD
2. To prevent the short circuit current protection feature from being prematurely activated, the input voltage
must be applied before a current source load is applied.
Notes: 1. VIN(MIN) =VOUT +VD.
2. To prevent the short circuit current protection feature from being prematurely activated, the input voltage
must be applied before a current source load is applied.
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QW-R502-315.M
L1183A

CMOS IC
TYPICAL APPLICATION CIRCUIT
INPUT
VIN
L1183A
NC
GND
C1
1µF
VOUT
OUTPUT
EN
C2
2.2µF
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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