LB11815AL-25-TQ2 [UTC]
1.5A CMOS LDO;
| 型号： | LB11815AL-25-TQ2 |
| 厂家： | 
Unisonic Technologies |
| 描述： | 1.5A CMOS LDO |
| 文件： | 总4页 (文件大小：199K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L11815A
CMOS IC
1.5A CMOS LDO
DESCRIPTION
The UTC L11815A is a COMS linear regulator. One of it’s
feature is very low quiescent current typical as low as 45μA and its
dropout voltage is extremely low with 1.5A output current.
The internal circuit includes thermal shutdown and current
fold-back mechanism to prevent device failure when the circuit is
operated in the bad conditions.
In application, the UTC L11815A needs a low noise, regulated
supply. For stable operation, the output capacitance value should
be 4.7μF or more.
The UTC L11815A is an ideal for battery applications, such as
instrumentations, portable electronics, wireless devices, PC
peripherals, and battery powered widgets. The output voltage
values are set during manufacturing and the accuracy is tighten
1.5%.
FEATURES
* Quiescent Current (45μA typ.)
* Very Low Dropout Voltage
* Guaranteed 1.5A output
* Accuracy : ±1.5%
* Over-Temperature ShutDown
* With Current Limiting
* Short Circuit Current Fold-Back
* Low Temperature Coefficient
ORDERING INFORMATION
Ordering Number
Package
Pin Assignment
Packing
Lead Free
-
Halogen Free
L11815AG-xx-AA3-x-R
L11815AG-xx-TA3-x-T
L11815AG-xx-TN3-x-R
L11815AG-xx-TQ2-x-R
L11815AG-xx-TQ2-x-T
SOT-223
TO-220
TO-252
TO-263
TO-263
Tape Reel
Tube
L11815AL-xx-TA3-x-T
L11815AL-xx-TN3-x-R
L11815AL-xx-TQ2-x-R
L11815AL-xx-TQ2-x-T
A: GOI
D: IGO
Tape Reel
Tape Reel
Tube
Note: Pin Assignment: G:GND O:VOUT I:VIN
xx: Output Voltage, refer to Marking Information.
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QW-R502-346.I
L11815A
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
L11815AG
XX
Pin Code
SOT-223
15: 1.5V
18: 1.8V
19: 1.9V
25: 2.5V
28: 2.8V
33: 3.3V
Voltage Code
Date Code
1
2
3
L: Lead Free
G: Halogen Free
Lot Code
UTC
L11815A
XX
TO-252
TO-263
TO-220
Pin Code
Voltage Code
Date Code
BLOCK DIAGRAM
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L11815A
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VIN
RATINGS
-0.3 ~ +8
UNIT
V
Input Voltage
Output Voltage
VOUT
PD
GND - 0.3 ~ VIN + 0.3
Internally limited
150
V
Power Dissipation
Junction Temperature
Operating Temperature
Storage Temperature
TJ
°C
°C
°C
TOPR
TSTG
- 40 ~ +85
- 65 ~ +150
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.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
°C/W
SOT-223
140
62.5
103
15
Junction to Ambient
Junction to Case
TO-220/ TO-263
TO-252
θJA
SOT-223
TO-220/ TO-263
TO-252
θJC
4
°C/W
12
ELECTRICAL CHARACTERISTICS (VIN = VO(Nom) +2V, TA = 25°C, unless otherwise specified.)
PARAMETER
SYMBOL
VIN
TEST CONDITIONS
MIN
Note
-1.5
TYP MAX UNIT
Input Voltage
7
V
Output Voltage Accuracy
VOUT
IO=1mA
1.5
0.15
0.1
%
%
%
∆VOUT
VOUT
VOUT<2.0V
-0.15
-0.1
IOUT=1mA
Line Regulation
Load Regulation
VIN=VOUT+1~ VOUT+2
VOUT≥2.0V
0.02
0.2
∆VOUT
VOUT
I
OUT=1mA ~ 1500mA
-1
1
%
Output Current
IOUT
ILIMIT
ISC
1500
mA
mA
mA
µA
Current Limit
1500 2000
Short Circuit Current
Quiescent Current
Ground Pin Current
VIN= VO(NOM)+1V, VOUT<0.4V
IOUT=0mA
750
45
IQ
70
IGND
IOUT=1mA ~ 1500mA
45
µA
VO(NOM)≤2.0V
1300
800
mV
mV
°C
I
V
OUT=1.5A
OUT=VO(NOM)-2.0%
Dropout Voltage
VD
VO(NOM)>2.0V
Over Temperature Shutdown
Over Temperature Hysteresis
Temperature Coefficient of
Output Voltage
OTS
OTH
150
30
°C
ppm/°
C
TCVO
30
f=100Hz
70
50
20
30
dB
Power Supply Rejection
PSRR
eN
IOUT=100mA, CO=4.7µF f=1kHz
f=10kHz
dB
dB
Output Voltage Noise
Note:VIN(MIN)=VOUT+VD
f=10Hz ~ 100kHz, IOUT=10mA, Co=4.7µF
µVRMS
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L11815A
CMOS IC
DETAILED DESCRIPATION
The UTC L11815A of CMOS regulators insist of a PMOS pass transistor, voltage reference, error amplifier,
over-current protection, and thermal shutdown.
The error amplifier, over-current shutdown, and thermal protection circuits provides data for P-channel pass
transistor. The error amplifier takes output voltage for a precision reference in the normal operation and the normal
operation is restored when the junction temperature drops below 120°C.Over-current and Thermal shutdown circuits
start to work when the junction temperature is higher than 150 °C, or the current exceeds 2.2A. The output voltage
stays low when the thermal shutdown is in active.
The UTC L11815A behaves like a current source when the load reaches 2.2A. But the current would fall back to
600mA to prevent excessive power loss when the load impedance value is below 0.3Ω.Normal operation is restored
when the load resistance value is higher than 0.75 Ω.
EXTERNAL CAPACITORS
The UTC L11815A has an output capacitor to ground of 4.7μF or more in the stable operation. Ceramic
capacitors can provide the lowest ESR with the best AC performance. Aluminum Electrolytic capacitors, in contrast,
have the highest ESR with poorest AC response. Unfortunately, large value ceramic capacitors are comparatively
expensive. So we can parallel a 0.1μF ceramic capacitor with a 10μF Aluminum Electrolytic. The result is low ESR,
high capacitance, and low overall cost.
A second capacitor is recommended between the input and ground to stabilize input voltage. To get an ideal
effect the value of the input capacitor should be at least 0.1μF.
All capacitors should be placed in close proximity to the pins. This can be achieved with a star connection.
TYPICAL APPLICATION CIRCUIT
VOUT
VIN
VIN
VOUT
L11815A
GND
C1=1µF
C2=4.7µF
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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