UNISONIC TECHNOLOGIES CO., LTD
L1183A
300mA CMOS LDO
DESCRIPTION
Preliminary
CMOS IC
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
Package
SOT-25
SOT-26
Packing
Tape Reel
Tape Reel
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.
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L1183A
MARKING INFORMATION
VOLTAGE CODE
12:1.2V
15 :1.5V
SOT-25
18:1.8V
25:2.5V
28 :2.8V
30: 3.0V
31 :3.1V
SOT-26
33 :3.3V
50:5.0V
PACKAGE
Preliminary
CMOS IC
MARKING
6 5
Voltage
Code
4
G: Halogen Free
L: Lead Free
SXXA□
1
2
3
PIN CONFIGURATION
V
IN
1
GND 2
EN 3
5 V
OUT
4 NC
SOT-25
SOT-26
PIN DESCRIPTION
PIN NO.
1
2
SOP-25
3
4
5
1
2
3
4
5
6
PIN NAME
V
IN
GND
EN
NC
V
OUT
SENSE
GND
BYP
EN
V
DD
V
OUT
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.
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.
PACKAGE
SOP-26
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L1183A
BLOCK DIAGRAM
V
IN
Preliminary
CMOS IC
Overcurrent Shutdown
EN
NC
-
AMP
+
V
OUT
R1
V
REF
=1.215V
R2
GND
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L1183A
PARAMETER
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
(Unless otherwise specified)
SYMBOL
V
IN
RATINGS
UNIT
Input Voltage
-0.3~ +6.5
V
Input Voltage (EN,BYP)
-0.3~ +6.5
V
Output Voltage
V
OUT
-0.3~ V
IN
+0.3
V
Output Current
I
OUT
300
mA
Power Dissipation
P
D
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
SYMBOL
T
A
T
J
T
STG
RATINGS
- 40 ~ +85
150
-65 ~ +150
UNIT
°C
°C
°C
Ambient Temperature
Junction Temperature
Storage Temperature
THERMAL DATA
PARAMETER
SYMBOL
θ
JA
θ
JC
RATINGS
280
140
UNIT
°C/W
°C/W
Junction to Ambient
Junction to Case (Note)
Note:
θ
JC
on center of molding compound if IC has on tab
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L1183A
PARAMETER
Input Voltage
SYMBOL
V
IN
∆
V
OUT
V
OUT
∆
V
OUT
V
OUT
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C, Unless otherwise specified)
TEST CONDITIONS
V
IN
=V
OUT
+1~V
OUT
+2
I
OUT
=1mA
1.2V≤V
OUT
≤1.4V
1.4V<V
OUT
≤2.0V
2.0V<V
OUT
<4.0V
MIN TYP
Note1
-0.2
-0.15
-0.1 0.02
-0.1
-1
-1.5
-2.5
30
0.02
0.2
MAX
6.5
0.2
0.15
0.1
0.1
1
1.5
2.5
50
1300
400
300
UNIT
V
%
%
%
%
%
%
%
µA
mV
dB
dB
dB
µV
RMS
mA
mA
mA
µA
ppm/°C
V
IN
0.4
2.0
0.5
1
0.4
V
V
µA
µA
µA
V
Line Regulation
V
IN
=V
OUT
+1~V
OUT
+1.5V
V
OUT
=5.0V
I
OUT
=1mA
I
OUT
=1mA~300mA
I
OUT
=1mA
I
OUT
=300mA
I
OUT
=0mA
1.2V≤V
O(NOM)
≤2.0V
2.4V<V
O(NOM)
≤2.8V
2.8V<V
O(NOM)
≤5.0V
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
I
OUT
=300mA
V
OUT
=V
O(NOM)
-2.0%
Load Regulation
Output Voltage Accuracy
Quiescent Current
Dropout Voltage
I
Q
V
D
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
PSRR
eN
I
OUT
I
LIMIT
I
SC
I
GND
T
C
V
O
V
EH
V
EL
I
EH
I
EL
I
SD
V
SD
60
50
20
30
300
300
450
150
35
30
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
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
=6.5V, V
O
=0V, V
EN
<V
EL
I
O
=0.4mA, V
EN
<V
EL
2.0
0
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