UNISONIC TECHNOLOGIES CO., LTD
L1183A
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 thermal shutdown and 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.
Preliminary
CMOS IC
FEATURES
* Accurate To Within 1.5%
* Quiescent Current: 30μA
* Internal Over-Temperature Shutdown
* With Current Limiting
* Internal Short Circuit Current Fold-Back
* Has Power-Saving Shutdown Mode
* Very Low Temperature Coefficient
* Halogen Free
ORDERING INFORMATION
Ordering Number
L1183AG-xx-AF5-R
L1183AG-xx-AG6-R
Package
SOT-25
SOT-26
Packing
Tape Reel
Tape Reel
Note: xx: Output Voltage, refer to Marking Information.
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QW-R502-315.e
L1183A
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
Preliminary
CMOS IC
MARKING
3
2
1
SOT-25
12 :1.2V
15 :1.5V
28 :2.8V
31 :3.1V
33 :3.3V
Voltage
Code
SXXAG
4
5
SOT-26
PIN CONFIGURATION
V
IN
1
GND 2
EN 3
5 V
OUT
4 NC
SOT-25
SOT-26
PIN DESCRIPTION
PACKAGE
PIN NO.
1
2
SOP-25
3
4
5
1
2
SOP-26
3
4
5
6
PIN NAME
V
IN
GND
EN
NC
V
OUT
SENSE
GND
BYP
EN
VDD
V
OUT
Output voltage pin. The capacitor which connected between
this pin and GND should be decoupled with a 1µF or a
greater value low ESR ceramic capacitor.
Remote Sense.
Ground.
Bypass capacitor for noise reduction.
Enable Input.
Supply Input.
Output Voltage.
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.
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QW-R502-315.e
L1183A
BLOCK DIAGRAM
V
IN
Preliminary
CMOS IC
Overcurrent Shutdown
EN
Thermal Shutdown
NC
-
AMP
+
V
OUT
R1
V
REF
=1.215V
R2
GND
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L1183A
ABSOLUTE MAXIMUM RATING
PARAMETER
Preliminary
SYMBOL
V
IN
CMOS IC
RATINGS
UNIT
Input Voltage
-0.3~ +8
V
Input Voltage (EN,BYP)
-0.3~ +8
V
Output Voltage
V
OUT
-0.3~ V
IN
+0.3
V
Output Voltage
I
OUT
P
D
/ (V
IN
- V
OUT
)
mA
Power Dissipation
P
D
400
mW
Junction Temperature
T
J
150
°C
Storage Temperature
T
STG
-65~ +150
°C
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
T
J
T
STG
SYMBOL
θ
JA
θ
JC
RATINGS
- 40~ +85
- 40~ +125
-65~ +125
RATINGS
280
140
UNIT
°C
°C
°C
UNIT
°C/W
°C/W
THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case (Note)
Note:
θ
JC
on center of molding compound if IC has on tab
ELECTRICAL CHARACTERISTICS
(
T
a
= 25°C, Unless otherwise specified)
PARAMETER
Input Voltage
Line Regulation
Load Regulation
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
Over Temperature Shutdown
Over Temperature Hysteresis
Temperature Coefficient of
Output Voltage
EN Input Threshold
EN Input Bias Current
I
Q
V
D
PSRR
eN
I
OUT
I
LIMIT
I
SC
I
GND
OTS
OTH
T
C
V
O
V
EH
V
EL
I
EH
I
EL
I
SD
V
SD
V
IN
=2.7V~6.5V
V
IN
=2.7V~6.5V
V
EN
=V
IN
, V
IN
=2.7V~6.5V
V
EN
=0V, V
IN
=2.7V~6.5V
V
IN
=5V, V
O
=0V, V
EN
<V
EL
I
O
=0.4mA, V
EN
<V
EL
2.0
0
SYMBOL
V
IN
Δ
V
OUT
V
OUT
Δ
V
OUT
V
OUT
TEST CONDITIONS
1.2V≤V
OUT
≤1.4V
V
IN
=V
OUT
+1~V
OUT
+2
1.4V<V
OUT
≤2.0V
I
OUT
=1mA
2.0V<V
OUT
<4.0V
I
OUT
=1mA~300mA
I
OUT
=1mA
I
OUT
=300mA
I
OUT
=0mA
I
OUT
=300mA
V
OUT
=V
O(NOM)
-2.0%
MIN TYP
Note1
-0.2
-0.15
-0.1 0.02
-1
-1.5
-2.5
30
0.2
MAX
6.5
0.2
0.15
0.1
1
1.5
2.5
50
1300
400
UNIT
V
%
%
%
%
%
%
µA
mV
mV
dB
dB
dB
µV
RMS
mA
mA
mA
µA
°C
°C
ppm/°C
1.2V≤V
O(NOM)
≤2.0V
2.4V<V
O(NOM)
≤2.8V
f=100Hz
I
OUT
=100mA
f=1kHz
C
OUT
=2.2µF
f=10kHz
I
OUT
=10mA,C
OUT
=2.2µF,f=10Hz~100kHz,
V
OUT
>1.2V
V
OUT
>1.2V
V
OUT
<0.8V
I
OUT
=1mA ~300mA
60
50
20
30
300
300
450
150
35
150
30
30
V
IN
0.4
0.1
0.5
1
0.4
300
Shutdown Supply Current
0.5
Shutdown Output Voltage
0
Notes: 1. V
IN(MIN)
=V
OUT
+V
D
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.
V
V
µA
µA
µA
V
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QW-R502-315.e
L1183A
TYPICAL APPLICATION CIRCUIT
Preliminary
CMOS IC
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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QW-R502-315.e
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