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UNISONIC TECHNOLOGIES CO., LTD
L1183A
300mA CMOS LDO
Preliminary
CMOS IC
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
Lead Free
Halogen Free
L1183AL-xx-AF5-R
L1183AG-xx-AF5-R
L1183AL-xx-AG6-R
L1183AG-xx-AG6-R
Note: xx: Output Voltage, refer to Marking Information.
Package
SOT-25
SOT-26
Packing
Tape Reel
Tape Reel
L1183AL-xx-AF5-R
(1) Packing Type
(2) Package Type
(3) Output Voltage Code
(1) R: Tape Reel
(2) AF5: SOT-25, AG6: SOT-26
(3) xx: Refer to Marking Information
(4) Lead Free
(4) L: Lead Free, G: Halogen Free
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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L1183A
MARKING INFORMATION
PACKAGE VOLTAGE CODE
SOT-25
SOT-26
12:1.2V
15 :1.5V
18:1.8V
25:2.5V
28 :2.8V
30: 3.0V
31 :3.1V
33 :3.3V
50:5.0V
Preliminary
MARKING
CMOS IC
Voltage Code
654
SXXA
123
G: Halogen Free
L: Lead Free
PIN CONFIGURATION
PIN DESCRIPTION
PACKAGE
SOT-25
PIN NO.
1
2
3
4
5
SOT-26
1
2
3
4
5
6
PIN NAME
VIN
GND
EN
NC
VOUT
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1183A
BLOCK DIAGRAM
Preliminary
VIN
Overcurrent Shutdown
EN
NC -
AMP
+
VREF=1.215V
CMOS IC
VOUT
R1
R2
GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1183A
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (Unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
Input Voltage (EN,BYP)
VIN
-0.3~ +6.5
V
-0.3~ +6.5
V
Output Voltage
Output Current
VOUT
IOUT
-0.3~ VIN+0.3
300
V
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
THERMAL DATA
PARAMETER
SYMBOL
Junction to Ambient
Junction to Case (Note)
θJA
θJC
Note: θJC on center of molding compound if IC has on tab.
RATINGS
280
140
UNIT
°C/W
°C/W
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L1183A
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (TA = 25°C, Unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Input Voltage
Line Regulation
Load Regulation
VIN
VOUT
VOUT
VOUT
VOUT
VIN=VOUT+1~VOUT+2
IOUT=1mA
1.2VVOUT1.4V
1.4V<VOUT2.0V
2.0V<VOUT<4.0V
VIN=VOUT+1~VOUT+1.5V
IOUT=1mA
VOUT=5.0V
IOUT=1mA~300mA
Note1
-0.2
-0.15
-0.1
0.02
-0.1 0.02
-1 0.2
6.5
0.2
0.15
0.1
0.1
1
V
%
%
%
%
%
Output Voltage Accuracy
IOUT=1mA
IOUT=300mA
-1.5 1.5 %
-2.5 2.5 %
Quiescent Current
IQ IOUT=0mA
30 50 µA
Dropout Voltage
VD
IOUT=300mA
VOUT=VO(NOM)-2.0%
1.2VVO(NOM)2.0V
2.4V<VO(NOM)2.8V
2.8V<VO(NOM)5.0V
1300
400
300
mV
Power Supply Ripple Rejection
PSRR
IOUT=100mA
COUT=2.2µF
f=100Hz
f=1kHz
f=10kHz
60 dB
50 dB
20 dB
Output Voltage Noise
Output Current
Current Limit
Short Circuit Current (Note2)
Ground Pin Current
Temperature Coefficient of
Output Voltage
eN
IOUT
ILIMIT
ISC
IGND
TCVO
IOUT=10mA,COUT=2.2µF,f=10Hz~100kHz
VOUT>1.2V
VOUT>1.2V
VOUT<0.8V
IOUT=1mA ~300mA
30 µVRMS
300 mA
300 450
mA
150 300 mA
35 µA
30 ppm/°C
EN Input Threshold
VEH VIN=2.7V~6.5V
VEL VIN=2.7V~6.5V
2.0 VIN V
0 0.4 V
EN Input Bias Current
IEH VEN=VIN, VIN=2.7V~6.5V
IEL VEN=0V, VIN=2.7V~6.5V
2.0 µA
0.5 µA
Shutdown Supply Current
ISD VIN=6.5V, VO=0V, VEN<VEL
0.5 1 µA
Shutdown Output Voltage
VSD IO=0.4mA, VEN<VEL
0 0.4 V
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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