UNISONIC TECHNOLOGIES CO., LTD L1131A

UNISONIC TECHNOLOGIES CO., LTD
L1131A
Preliminary
CMOS IC
LOW NOISE 150mA LDO
REGULATOR

DESCRIPTION
The UTC L1131A is a COMS positive linear regulator. One of
it’s feature is the very low quiescent current typical as low as 10μA
and its dropout voltage is extremely low with 150mA output current,
and high ripple rejection. Each of these ICs consists of a voltage
reference unit, an error amplifier, resistor-net for voltage setting, a
short current limit circuit, a chip enable circuit, and so on.
These ICs perform with low dropout voltage and the chip-enable
function. The supply current at no load of this IC is only 10μA, and
the line transient response and the load transient response of the
UTC L1131A Series are excellent, thus these ICs are very suitable
for the power supply for hand-held communication equipment.
The output voltage of these ICs is fixed with high accuracy.
Since the packages for these ICs are SOT-23-5 therefore high
density mounting of the ICs on boards is possible.

FEATURES
* Low supply current Typ. 10μA
* Standby mode Typ. 0.1μA
* Output Voltage Range 1.2V~5.0V
* Excellent line regulation Typ. 0.02%/V
* Built-in fold back protection circuit
* Ceramic capacitors are recommended to be used with this IC
CIN=COUT=1μF

ORDERING INFORMATION
Note:
Ordering Number
L1131AG-xx-AE5-R
xx: Output Voltage, refer to Marking Information.
L1131AG-xx-AE5-R
Package
SOT-23-5
(1)Packing Type
(1) R: Tape Reel
(2)Package Type
(2) AE5: SOT-23-5
(3)Output Voltage Code
(3) xx: refer to Marking Information
(4)Green Package
(4) G: Halogen Free and Lead Free
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Copyright © 2015 Unisonic Technologies Co., Ltd
Packing
Tape Reel
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L1131A
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Preliminary
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-23-5
15: 1.5V
25: 2.5V
28: 2.8V
33: 3.3V

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO.
1
2
3
4
5

CMOS IC
PIN NAME
VDD
GND
CE
NC
VOUT
MARKING
DESCRIPTION
Input pin
Ground pin
Chip enable pin
No connection
Output pin
BLOCK DIAGRAM
VDD
VOUT
+
VREF
Current Limit
CE
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GND
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
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
6.5
V
Input Voltage (CE Pin)
VCE
6.5
V
Output Voltage
VOUT
-0.3~VIN+0.3
V
Output Current
IOUT
160
mA
Power Dissipation
PD
360
mW
Operating Temperature Range
TOPT
-40~85
°C
Storage Temperature Range
TSTG
-55~125
°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.

ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
Line Regulation
Ripple Rejection
Input Voltage
Output Voltage
Temperature Coefficient
Short Current Limit
CE Pull-Down Resistance
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
On Resistance of Nch Tr. for
auto-discharge (Only for D version)

SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VIN = Set VOUT+1V,
VOUT≤3.0V
×0.985
×1.015
VOUT
V
1mA ≤ IOUT ≤30mA VOUT>3.0V
×0.980
×1.020
IOUT
VIN-VOUT=1.0V
150
mA
VIN=Set VOUT+1V, 1mA≤IOUT≤150mA,
28
55
mV
1.2V≤VOUT<2.0V,
∆VOUT/∆IOUT
2.0V≤VOUT<3.0V
33
66
mV
3.0V≤VOUT
35
80
mV
refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VDIF
VOLTAGE
ISS
VIN=Set VOUT+1V, IOUT=0mA
10
18
μA
Istandby VIN=Set VOUT+1V, VCE =VDD
0.1
1.0
μA
Set VOUT+0.5V≤VIN≤6.0V,
0.02 0.10
%/V
∆VOUT/∆VIN
IOUT=30mA
f=1kHz
50
dB
RR
f=10kHz, Ripple 0.2Vp-p,
45
dB
VIN-VOUT=1.0V, IOUT=30mA
VIN
1.8
6.0
V
IOUT=30mA
∆VOUT/∆T
±100
ppm/°C
-40°C≤TOPT≤85°C
ILIM
VOUT=0V
60
mA
IPD
0.5
µA
VCEH
1.5
6.0
V
VCEL
0.0
0.3
V
en
BW=10Hz~100kHz
30
µVrms
RLOW
VCE=0V
70
Ω
ELECTRICAL CHARACTERISTICS BY OUTPUT VOLTAGE
PARAMETER
Dropout Voltage
SYMBOL
VDIF
TEST CONDITIONS
VOUT=1.2V
1.5V<VOUT≤1.6V
1.6V<VOUT≤1.7V
IOUT=150mA
1.7V<VOUT≤2.0V
2.0V<VOUT≤2.7V
2.7V<VOUT≤5.0V
UNISONIC TECHNOLOGIES CO., LTD
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MIN
TYP
0.65
0.48
0.41
0.35
0.21
0.18
MAX
UNIT
V
V
V
V
V
V
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Preliminary
CMOS IC
TEST CIRCUIT
VOUT
IOUT
VOUT V
C2
GND
VDD
UTC
L1131A
Series
C1
CE
*C1=Ceramic 1.0μF
C2=Ceramic 1.0μF
Fig.1 Standard test Circuit
Fig.2 Supply Current Test Circuit
VOUT
IOUT
VDD
UTC
L1131A
Series
C2
GND
Pulse
Generator
CE
*C2=Ceramic 1.0μF
Fig.3 Ripple Rejection, Line Transient
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L1131A

Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
(External Components)
C2 Ceramic 1.0μF
Ex. Murata GRM155B30J105KE18B
Kyocera CM05X5R105K06AB
C1 Ceramic 1.0μF
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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