UNISONIC TECHNOLOGIES CO., LTD
LR1122D
LOW NOISE 200mA LDO
REGULATOR
DESCRIPTION
The UTC
LR1122D
is a typical LDO (linear regulator) with the
features of high output voltage accuracy, low supply current, low
ON-resistance, and high ripple rejection.
During operation of the UTC
LR1122D,
the dropout voltage is
very low and the response of line transient and load transient are
very well.
Internally, there’re many functions of UTC
LR1122D
which can
be seen in the block figure. There are a voltage reference unit, an
error amplifier, resistor-net for voltage setting, a current limit circuit,
and a chip enable circuit in each UTC
LR1122D.
The UTC
LR1122D
can be used as an ideal of the power supply
for hand-held communication equipment, such as: power source for
portable communication equipment, power source for electrical
appliances, for example, cameras, VCRs and camcorders and power
source for battery-powered equipment.
CMOS IC
FEATURES
20µA (Typ.)
0.1µA (Typ.)
0.13V (Typ.)
@I
OUT
=150mA, V
OUT
=2.85V
75dB (Typ.)
@f=1kHz,V
OUT
=2.85V
±30ppm/°C
(Typ.)
*
Ultra Supply Current:
*
Standby Mode:
*
Very Low Dropout Voltage:
*
Ripple Rejection:
*
Temperature-Drift Coefficient
of Output Voltage:
0.02%/ V (Typ.)
*
Well Line Regulation:
±1.0%
(Typ.)
*
Output Voltage Accuracy:
*
Internal Fold Back Protection Circuit: 40mA (Typ.)
@
short mode
*
C
IN
=C
OUT
=1µF or more (Ceramic capacitors) are recommended to
be used with this IC
ORDERING INFORMATION
Package
SOT-89
SOT-25
1
G
I
Pin Assignment
2
3
4
I
O
-
G
CE
NC
5
-
O
Packing
Tape Reel
Tape Reel
Ordering Number
Lead Free
Halogen Free
LR1122DL-xx-AB3-C-R LR1122DG-xx-AB3-C-R
LR1122DL-xx-AF5-R
LR1122DG-xx-AF5-R
Note: xx: Output Voltage, refer to Marking Information.
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QW-R502-320.O
LR1122D
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
V
IN
V
CE
V
OUT
I
OUT
CMOS IC
RATINGS
UNIT
Input Voltage
9
V
Input Voltage(CE Pin)
8.5
V
Output Voltage
-0.3~ V
IN
+0.3
V
Output Current
200
mA
SOT-25
360
Power Dissipation
P
D
mW
SOT-89
530
Junction Temperature
T
J
+125
°С
Operating Temperature
T
OPR
-40 ~ +85
°С
Storage Temperature
T
STG
-55 ~ +125
°С
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
TYP
MAX
×1.01
+20
7.5
40
40
2
UNIT
V
mV
V
mV
mA
µA
µA
mA
µA
V
V
µVrms
dB
1.00
0.80
0.36
0.30
0.25
0.23
0.30
(T
A
=25°С, V
IN
=Set V
OUT
+1V, I
OUT
=1mA, C
I
=C
O
=1µF, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
V
IN
= Set V
OUT
+1V
V
OUT
> 2.0V
×0.99
Output Voltage
V
OUT
I
OUT
=30mA
-20
V
OUT
≤
2.0V
Input Voltage
V
IN
Load Regulation
∆V
OUT
1mA≤I
OUT
≤150mA
Output Current
I
OUT
200
Supply Current
I
SS
I
OUT
=0A
Supply Current (Standby)
I
ST-BY
V
CE
=0V
Short Current Limit
I
LIMIT
V
OUT
=0V
CE Pull-down Current
I
PD
High
V
CEH
1.5
CE Input Voltage
Low
V
CEL
Output Noise
eN
B
W
=10Hz to 100kHz, I
OUT
=30mA
f=1kHz, Ripple 0.2V
P-P
V
IN
=Set V
OUT
+1V, I
OUT
=30mA
Ripple Rejection
RR
(In case that V
OUT
=2.0V, V
IN
=3V)
1.2V≤V
OUT
＜1.5V
1.5V≤V
OUT
＜1.7V
1.7V≤V
OUT
＜2.0V
Dropout Voltage
V
D
I
OUT
=150mA
2.0V≤V
OUT
＜2.5V
2.5V≤V
OUT
＜2.8V
∆V
OUT
∆V
IN
20
20
0.1
40
0.3
0.3
30
75
0.90
0.60
0.21
0.17
0.14
0.13
0.02
±30
70
V
Line Regulation
Output Voltage Temperature
Coefficient
Low Output Nch Tr.
ON Resistance
2.8V≤V
OUT
≤5.0V
1.2V≤V
OUT
≤4.0V,
V
SET
+1V≤V
IN
≤5V
4.0V<V
OUT
≤5.0V,
V
SET
+1V≤V
IN
≤6.5V
-40°С≤T
OPR
≤85°С
V
IN
=4.0,V
CE
=0V
%/V
ppm/°С
Ω
∆V
OUT
∆T
R
LOW
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QW-R502-320.O
LR1122D
TYPICAL CHARACTERISTICS
2.4
2.0
Output Voltage, V
OUT
(V)
Output Voltage, V
OUT
(V)
1.6
1.2
0.8
0.4
0
V
OUT
=2V
V
IN
=3V
V
IN
=4V
V
IN
=5V
0
50
100
150
200
250
300
350
400
Output Current, I
OUT
(mA)
Output Voltage vs. Output Current
2.05
2.04
2.03
2.02
2.01
2.00
1.99
1.98
1.97
1.96
1.95
Output Voltage vs. Temperature
CMOS IC
(V
IN
=3V)
V
OUT
=2V
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature, T
OPR
(°С)
450
400
Dropout Voltage, V
D
(mV)
350
300
Dropout Voltage vs. Output Current
Input Transient Response
Input Voltage, V
IN
(V)
Output Current, I
OUT
(mA)
Input Voltage
4.0
3.0
Output Voltage, V
OUT
(V)
250
200
150
100
50
0
0
50
100
150
Output Current, I
OUT
(mA)
T
A
=25°C
V
OUT
=2V
200
10mV/div
V
OUT
=2V
I
OUT
=30mA
t
R
= t
F
= 5µs
Output Voltage
0
20
40
60
80 100 120 140 160 180 200
Time, t (µs)
Load Transient Response
Output Current, I
OUT
(mA)
Load Transient Response
150
100
50
Output Voltage, V
OUT
(V)
Output Current 50mA
20mV/div
100mA
0
200
100
Output Voltage, V
OUT
(V)
0
Output Current 10mA
50mV/div
150mA
Output Voltage
0
20
40
60
V
OUT
=2V
V
IN
=3V
120 140 160 180 200
80 100
Time, t (µs)
Output Voltage
0
20
40
60
V
OUT
=2V
V
IN
=3V
80 100 120 140 160 180 200
Time, t (µs)
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www.unisonic.com.tw
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QW-R502-320.O
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