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LR1108G-XX-AA3-D-R [UTC]

1A FAST ULTRA LOW DROPOUT LINEAR REGULATOR;
LR1108G-XX-AA3-D-R
型号： LR1108G-XX-AA3-D-R
厂家： Unisonic Technologies    Unisonic Technologies
描述：

1A FAST ULTRA LOW DROPOUT LINEAR REGULATOR
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UNISONIC TECHNOLOGIES CO., LTD  
LR1108  
CMOS IC  
1A FAST ULTRA LOW  
DROPOUT LINEAR  
REGULATOR  
„
DESCRIPTION  
The UTC LR1108 operate from a +2.5V ~ +7.0V input supply as  
fast ultra low-dropout linear regulators. Wide output voltage range  
options are available. The fast response characteristic to make UTC  
LR1108 suitable for low voltage microprocessor application. The low  
quiescent current operation and low dropout quality caused by the  
CMOS process.  
The UTC LR1108 has ultra low dropout voltage;  
300mV at 1A load current typically.  
The ground pin current is typically 200uA at 1mA load current.  
ERROR Flag: When the output voltage drops 10% below nominal  
value Error flag goes low.  
Output Voltage Precision: Multiple output voltage options are  
available and ranging from 1.2V ~ 5.0V at room temperature with a  
guaranteed accuracy of ±1.5%, and ±3.0% when varying line, load  
and temperature.  
„
FEATURES  
* Ultra Low Dropout Voltage  
* Low Ground Pin Current  
* 0.04% Load Regulation  
* The Guaranteed Output Current is 1A DC  
* Output Voltage Accuracy ± 1.5%  
* ERROR Flag Indicates Output Status  
* Low Output Capacitor Required  
* Over temperature Protection And Over current Protection  
„
ORDERING INFORMATION  
Ordering Number  
Pin Assignment  
c
Package  
Packing  
Lead Free  
Halogen Free  
LR1108L-xx-AA3-c-R  
LR1108L-xx-AB3-c-R  
LR1108L-xx-TN3-c-R  
LR1108L-xx-AF5-R  
LR1108G-xx-AA3-c-R  
LR1108G-xx-AB3-c-R  
LR1108G-xx-TN3-c-R  
LR1108G-xx-AF5-R  
SOT-223  
SOT-89  
TO-252  
SOT-25  
A: GOI  
C: GIO  
D: IGO  
Tape Reel  
I
G
SD ERROR  
O
www.unisonic.com.tw  
Copyright © 2012 Unisonic Technologies Co., Ltd  
1 of 6  
QW-R102-031.I  
LR1108  
CMOS IC  
„
MARKING INFORMATION  
PACKAGE  
VOLTAGE CODE  
MARKING  
SOT-223  
4
3
5
15 :1.5V  
18:1.8V  
25:2.5V  
2J:2.85V  
33:3.3V  
50: 5.0V  
SPXX  
SOT-25  
TO-252  
SOT-89  
G: Halogen Free  
L : Lead Free  
1
2
„
PIN DESCRIPTION  
For SOT-223/SOT-89/TO-252 Package  
PIN CODE & NO  
PIN NAME  
I/O  
O
DESCRIPTION  
A
2
1
3
C
3
1
2
D
3
2
1
VOUT  
GND  
VIN  
Output Voltage  
Ground  
Input Supply  
For SOT-25 Package  
PIN NO PIN NAME  
I/O  
I
DESCRIPTION  
1
2
VIN  
Input supply  
Ground  
GND  
Shutdown LR1108 enable; when the SD pin connects to GND will shutdown the  
LR1108; At normal operation, SD must be tied to VDD through a 10KΩ pull up  
resistor.  
3
SD  
Error flag, active low; when the output dropout of regulation due to low input  
voltage, the LR1108 produces a logic low signal at the ERROR pin.  
Output voltage  
4
5
O
O
ERROR  
VOUT  
UNISONIC TECHNOLOGIES CO., LTD  
2 of 6  
QW-R102-031.I  
www.unisonic.com.tw  
LR1108  
CMOS IC  
„
BLOCK DIAGRAM  
UNISONIC TECHNOLOGIES CO., LTD  
3 of 6  
QW-R102-031.I  
www.unisonic.com.tw  
LR1108  
CMOS IC  
„
ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
SYMBOL  
VIN  
RATINGS  
2.5~7.0  
UNIT  
Input Voltage (Operating) (Note 10)  
Input Voltage (Survival)  
V
V
V
V
-0.3~+7.5  
Shutdown Input Voltage  
VIN(SHDN)  
VOUT  
-0.3~VIN+0.3  
-0.3~+7.5  
Output Voltage (Survival), (Note 4, 5)  
IOUT (Survival)  
Short Circuit Protected  
VIN+0.3  
Maximum Voltage for ERROR Pin  
Maximum Operating Current (DC)  
Power Dissipation (Note 2)  
Junction Temperature  
V
A
1
PD  
TJ  
Internally Limited  
+125  
°C  
°C  
°C  
Operating Temperature  
TOPR  
TSTG  
-40~+125  
Storage Temperature  
-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  
165  
249  
112  
179  
15  
UNIT  
SOT-223  
SOT-25  
TO-252  
SOT-89  
SOT-223  
SOT-25  
TO-252  
SOT-89  
℃/W  
Junction to Ambient  
Junction to Case  
θJA  
165  
12  
℃/W  
θJC  
47  
„
ELECTRICAL CHARACTERISTICS  
Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature  
range. (TJ = 25°C, VIN = VO(NOM) + 1V, IL = 10mA, COUT = 2.2μF, VSD = VIN-0.3V, unless otherwise specified.)  
PARAMETER  
SYMBOL  
TEST CONDITIONS  
MIN  
-1.5  
-3  
TYP  
MAX  
+1.5  
+3  
UNIT  
0mA ≤ IL ≤ 1A  
OUT +1 ≤ VIN≤ 7.0V  
Output Voltage Tolerance (Note 6)  
Output Voltage Line Regulation (Note 6)  
VOUT  
0
%
V
△VOUT  
VOUT+1V<VIN<7.0V  
0.05  
0.04  
300  
200  
300  
%
%
Output Voltage Load Regulation (Note 6) △VOUT/△IOUT 10mA < IL < 1A  
Dropout Voltage (Note 8)  
Ground Pin Current In Normal Operation  
Mode  
VD  
IL = 1A  
500  
mV  
IL = 0mA  
IL = 1A  
IGND  
uA  
A
Peak Output Current  
IO(PEAK)  
(Note 2)  
1
SHORT CIRCUIT PROTECTION  
Short Circuit Current  
ISC  
2
A
OVER TEMPERATURE PROTECTION  
Shutdown Threshold  
TSHDN(THR)  
TSHDN(HYS)  
165  
10  
°C  
°C  
Thermal Shutdown Hysteresis  
SHUTDOWN INPUT  
Output = High  
Output = Low  
IL = 1A  
VIN-0.3  
VIN  
0
Shutdown Threshold  
VSHDN  
V
0.2  
Turn-off Delay  
Turn-on Delay  
SD Input Current  
tD(OFF)  
tD(ON)  
ISD  
20  
25  
1
μs  
μs  
nA  
IL = 1A  
VSD = VIN  
UNISONIC TECHNOLOGIES CO., LTD  
4 of 6  
QW-R102-031.I  
www.unisonic.com.tw  
LR1108  
CMOS IC  
„
ELECTRICAL CHARACTERISTICS(Cont.)  
PARAMETER  
SYMBOL  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
ERROR FLAG COMPARATOR  
ERROR Flag Saturation  
ERROR Flag Pin Leakage Current  
Threshold  
VEF(SAT)  
II(LEAK)  
VT  
ISINK = 100μA  
0.02  
1
0.1  
V
nA  
%
(Note 7)  
(Note 7)  
5
2
10  
5
16  
8
Threshold Hysteresis  
Flag Reset Delay  
VTHR  
tD  
%
1
μs  
AC PARAMETERS  
VIN = VOUT + 1.5V  
60  
40  
C
OUT=100uF, VOUT = 3.3V  
VIN = VOUT + 0.3V  
OUT=100uF, VOUT = 3.3V  
Ripple Rejection  
PSRR  
dB  
C
Output Noise Density  
Output Noise Voltage  
ρN(L/F)  
f = 120Hz  
0.8  
150  
100  
μV  
BW = 10Hz ~ 100kHz  
BW = 300Hz ~ 300kHz  
eN  
μVRMS  
Note 1. Conditions for which the device is intended to be functional is indicated by operating ratings, but specific  
performance limits isn’t be guaranteed. To make sure of specifications and test conditions, read Electrical  
Characteristics. Only for the test conditions listed the guaranteed specifications can be applied. When the  
device is not operated under the listed test conditions some performance characteristics may degrade.  
2. Devices must be derated based on package thermal resistance at elevated temperatures.  
3. The most likely parametric norm represents at 25°C.  
4. The LR1108 output must be diode-clamped to ground. If used in a dual-supply system where the regulator  
load is returned to a negative supply.  
5. Between the VIN and VOUT terminals the output PMOS structure contains a diode. This diode is reverse  
biased normally. If the voltage at the output terminal is forced to be higher than the voltage at the input  
terminal this diode will get forward biased. This diode can withstand 1Amp of peak current and 200mA of DC  
current typically.  
6. Output voltage line regulation is the change in output voltage from the nominal value which is due to change  
in the input line voltage. Which is defined as the change in output voltage from the nominal value due to  
change in load current is output voltage load regulation. The load regulation and line regulation specification  
include the typical number only. But, the limits for load and line regulation are included in the output voltage  
tolerance specification.  
7. Error Flag hysteresis and threshold are specified as regulated output voltage’s percentage.  
8. At which the output drops 2% below the normal value dropout voltage is defined as the minimum input to  
output differential voltage. Only to output voltages of 2.5V and above dropout voltage specification applies.  
For output voltages below 2.5V, since the minimum input voltage is 2.5V, the drop-out voltage is nothing but  
the input to output differential.  
9. Specification has been tested at -40°C ≤ TJ ≤ +85°Ccause under shutdown conditions the temperature rise  
of the device is negligible.  
10. The minimum operating VIN value is equal to [VOUT(NOM) + VDROPOUT] or 2.5V, just the greater.  
UNISONIC TECHNOLOGIES CO., LTD  
5 of 6  
QW-R102-031.I  
www.unisonic.com.tw  
LR1108  
CMOS IC  
„
TYPICAL APPLICATION CIRCUIT  
INPUT  
3.3V±10%  
VIN  
SD  
VOUT  
2.5V, 500mA  
VOUT  
UTC LR1108  
GND  
CIN  
1µF  
COUT  
4.7µF  
*
(Note)  
ERROR  
SD  
ERROR  
Note: SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this  
function is not used.  
„
TYPICAL CHARACTERISTICS  
Dropout Voltage vs. Output Current  
350  
300  
250  
200  
150  
100  
50  
0
0
250  
500  
750  
1000  
Output Current, IOUT (mA)  
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  
6 of 6  
QW-R102-031.I  
www.unisonic.com.tw  

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