L11810G-33-AA3-A-R [UTC]
Fixed Positive LDO Regulator, 3.3V, 1V Dropout, CMOS, PDSO3, HALOGEN FREE, SOT-223, 4 PIN;
| 型号： | L11810G-33-AA3-A-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | Fixed Positive LDO Regulator, 3.3V, 1V Dropout, CMOS, PDSO3, HALOGEN FREE, SOT-223, 4 PIN 光电二极管 输出元件 调节器 |
| 文件： | 总4页 (文件大小：194K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L11810
Preliminary
CMOS IC
1A CMOS LOW DROPOUT
VOLTAGE
DESCRIPTION
As UTC LDO, the features of the UTC L11810 include low
quiescent current and very low dropout voltage.
In order to prevent from the bad operating conditions, there are
internal thermal shutdown and current fold-back. For stably operation,
the UTC L11810 should be connected to an output capacitance of
2.2μF or larger.
1
SOT-223
The UTC L11810 is ideal for battery applications, such as
portable electronics, wireless devices, cordless phones, PC
peripherals and battery powered widgets.
FEATURES
* Extra low dropout voltage
* Output current: 1A (guaranteed)
* Output voltage accuracy: ±1.5%
* Quiescent current: 30μA
* Internal Over-Temperature shutdown
* With Current limiting
* Internal short circuit current fold-back
* Pre-set output voltages in factory
* Very low temperature coefficient
ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Packing
Lead Free
Halogen Free
1
G
I
2
3
I
L11810L-xx-AA3-A-R
L11810L-xx-AA3-D-R
L11810G-xx-AA3-A-R
L11810G-xx-AA3-D-R
SOT-223
SOT-223
O
G
Tape Reel
Tape Reel
O
Note: Pin Assignment: G:GND O:VOUT I:VIN
xx: Output Voltage, refer to Marking Information.
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Copyright © 2012 Unisonic Technologies Co., Ltd
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L11810
Preliminary
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
L11810G
G: Halogen Free
L: Lead Free
28 :2.8V
33 :3.3V
Pin Code
SOT-223
XX□□□□□
Voltage Code
Date Code
1
2
3
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO
PIN NAME
VIN
DESCRIPTION
1
2
Input voltage pin which should be decoupled with 1µF or greater capacitor.
GND
Ground.
Output voltage pin which should be decoupled with a ceramic capacitor (value: 2.2µF or
larger and low ESR).
3
VOUT
BLOCK DIAGRAM
VIN
Overcurrrent
Shutdown
Thermal
Shutdown
VREF=1.215V
AMP
VOUT
R1
R2
GND
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L11810
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VIN
RATINGS
UNIT
V
Input Voltage
8
Input ,Output Voltage
Output Current
GND - 0.3 ~ VIN + 0.3
V
IOUT
PD
1.2
900
A
Power Dissipation
mW
°C
°C
°C
Junction Temperature
Operating Temperature
Storage Temperature
TJ
125
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
θJA
RATINGS
120
UNIT
°C/W
°C/W
Junction to Ambient
Junction to Case (Note)
θJC
25
Note: Measure θJC on backside center of tab
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise specified.)
PARAMETER
SYMBOL
VIN
TEST CONDITIONS
MIN TYP MAX UNIT
Input Voltage
Note1
-1.5
7
V
Output Voltage Accuracy
VOUT
IOUT =1mA
1.5
0.15
%
%
%
%
1.8V≤VOUT≤2.0V
-0.15
ΔVOUT
IOUT =1mA,
Line Regulation
2.0V<VOUT<4.0V
VOUT≥4.0V
-0.1 0.02 0.1
-0.4 0.2 0.4
VOUT
VIN=VOUT+1~VOUT+2
ΔVOUT
VOUT
IOUT
ILIMIT
ISC
Load Regulation
IOUT =1mA~1000mA
0.4 1.2
%
Output Current
VOUT≥1.8V
VOUT≥1.8V
VOUT<0.8V
IOUT=0mA
1000
mA
mA
mA
µA
Current Limit
1100
Short Circuit Current
Quiescent Current
Ground Pin Current
400 800
IQ
30
35
50
IGND
IOUT =1mA~1000mA
µA
1.8V≤VOUT(NOM)≤2.0
V
1700 mV
1200 mV
I
V
OUT=1A
OUT=VOUT(NOM) -2.0%
Dropout Voltage
VD
2.0V<VOUT(NOM)≤2.8
V
2.8V<VOUT(NOM)
1000 mV
Over Temperature Shutdown
Over Temperature Hysteresis
Temperature Coefficient of
Output Voltage
OTS
OTH
150
30
°C
°C
TCVO
30
ppm/°C
f=100Hz
f=1kHz
60
50
20
30
dB
dB
Power Supply Ripple
Rejection
I
OUT=100mA
PSRR
eN
CO =2.2µF
f=10kHz
dB
Output Voltage Noise
IOUT=10mA, COUT=2.2μF, f=10Hz~100kHz
µVRMS
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
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L11810
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
APPLICATION INFORMATION
1. Detailed Description
Internal circuits include: a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and
thermal shutdown.
The data through the error amplifier, over-current shutdown, and thermal protection circuits, then to the
P-channel pass transistor.
As soon as the junction temperature exceeds 150°C or the current exceeds 1100mA, over-current and thermal
shutdown circuits start working. When the junction temperature drops below 120°C, normal operation is restored.
When the load exceeds the rated output current, for preventing the over stress, the chip switches from voltage
mode to current mode.
2. External Information
When considering the external capacitors, the L11810 is stable with an output capacitor to ground of 2.2μF or
greater. As we know, the ceramic capacitors have the lowest ESR but can offer the best AC performance; the
aluminum electrolytic capacitors exhibit the highest ESR but offer the poorest AC response. And also large value
ceramic capacitors are expensive. Consider all the situation, the best way is to parallel a 0.1μF ceramic capacitor with
a 10μF Aluminum Electrolytic (low ESR, high capacitance, and low overall cost).
For better beneficial effecting, the input capacitor should be at least 0.1μF.
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.
UNISONIC TECHNOLOGIES CO., LTD
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