UTC LR1108L-XX-TN3-C-R 1a fast ultra low dropout linear regulator Datasheet

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
Lead Free
Halogen Free
LR1108L-xx-AA3-c-R
LR1108G-xx-AA3-c-R
LR1108L-xx-AB3-c-R
LR1108G-xx-AB3-c-R
LR1108L-xx-TN3-c-R
LR1108G-xx-TN3-c-R
LR1108L-xx-AF5-R
LR1108G-xx-AF5-R
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Copyright © 2012 Unisonic Technologies Co., Ltd
Package
SOT-223
SOT-89
TO-252
SOT-25
I
Pin Assignment
c
A: GOI
C: GIO
D: IGO
G
SD ERROR
Packing
Tape Reel
O
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LR1108
„
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-223
4
5
15 :1.5V
18:1.8V
25:2.5V
2J:2.85V
33:3.3V
50: 5.0V
SOT-25
SPXX
1
2
G: Halogen Free
L : Lead Free
3
TO-252
SOT-89
„
PIN DESCRIPTION
For SOT-223/SOT-89/TO-252 Package
PIN CODE & NO
PIN NAME
A
C
D
2
3
3
VOUT
1
1
2
GND
3
2
1
VIN
For SOT-25 Package
PIN NO PIN NAME
1
VIN
2
GND
I/O
3
SD
I
4
ERROR
O
5
VOUT
O
I/O
O
DESCRIPTION
Output Voltage
Ground
Input Supply
DESCRIPTION
Input supply
Ground
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.
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
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LR1108
„
CMOS IC
BLOCK DIAGRAM
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LR1108
„
CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
2.5~7.0
V
Input Voltage (Operating) (Note 10)
VIN
Input Voltage (Survival)
-0.3~+7.5
V
Shutdown Input Voltage
VIN(SHDN)
-0.3~VIN+0.3
V
Output Voltage (Survival), (Note 4, 5)
VOUT
-0.3~+7.5
V
IOUT (Survival)
Short Circuit Protected
Maximum Voltage for ERROR Pin
VIN+0.3
V
Maximum Operating Current (DC)
1
A
Power Dissipation (Note 2)
PD
Internally Limited
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-40~+125
°C
Storage Temperature
TSTG
-65~+150
°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.
„
THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case
„
SYMBOL
SOT-223
SOT-25
TO-252
SOT-89
SOT-223
SOT-25
TO-252
SOT-89
θJA
θJC
RATINGS
165
249
112
179
15
165
12
47
UNIT
℃/W
℃/W
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
TYP
MAX
UNIT
+1.5
0mA ≤ IL ≤ 1A
-1.5
%
0
Output Voltage Tolerance (Note 6)
VOUT
+3
VOUT +1 ≤ VIN≤ 7.0V
-3
Output Voltage Line Regulation (Note 6)
△VOUT
VOUT+1V<VIN<7.0V
0.05
%
Output Voltage Load Regulation (Note 6) △VOUT/△IOUT 10mA < IL < 1A
0.04
%
Dropout Voltage (Note 8)
VD
IL = 1A
300
500
mV
200
IL = 0mA
Ground Pin Current In Normal Operation
IGND
uA
Mode
IL = 1A
300
Peak Output Current
IO(PEAK)
(Note 2)
1
A
SHORT CIRCUIT PROTECTION
Short Circuit Current
ISC
2
A
OVER TEMPERATURE PROTECTION
Shutdown Threshold
TSHDN(THR)
165
°C
Thermal Shutdown Hysteresis
TSHDN(HYS)
10
°C
SHUTDOWN INPUT
VIN
Output = High
VIN-0.3
V
Shutdown Threshold
VSHDN
Output = Low
0
0.2
Turn-off Delay
tD(OFF)
IL = 1A
20
μs
Turn-on Delay
tD(ON)
IL = 1A
25
μs
SD Input Current
ISD
VSD = VIN
1
nA
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LR1108
„
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
ERROR FLAG COMPARATOR
ERROR Flag Saturation
ERROR Flag Pin Leakage Current
Threshold
Threshold Hysteresis
Flag Reset Delay
AC PARAMETERS
SYMBOL
VEF(SAT)
II(LEAK)
VT
VTHR
tD
TEST CONDITIONS
MIN
ISINK = 100μA
(Note 7)
(Note 7)
5
2
TYP
MAX
UNIT
0.02
1
10
5
1
0.1
V
nA
%
%
μs
16
8
VIN = VOUT + 1.5V
60
COUT=100uF, VOUT = 3.3V
dB
Ripple Rejection
PSRR
VIN = VOUT + 0.3V
40
COUT=100uF, VOUT = 3.3V
Output Noise Density
ρN(L/F)
f = 120Hz
0.8
μV
BW = 10Hz ~ 100kHz
150
Output Noise Voltage
eN
μVRMS
BW = 300Hz ~ 300kHz
100
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.
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LR1108
CMOS IC
TYPICAL APPLICATION CIRCUIT
„
INPUT
3.3V±10%
VIN
VOUT
2.5V, 500mA
VOUT
UTC LR1108
CIN
1µF
SD*
SD
ERROR
ERROR (Note)
COUT
4.7µF
GND
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
Dropout Voltage, VD (mV)
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.
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