UNISONIC TECHNOLOGIES CO., LTD
LR9102/A
LOW NOISE 300mA LDO
REGULATOR
DESCRIPTION
The UTC
LR9102/A
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
LR9102/A,
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
LR9102/A
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
LR9102/A,
with auto
discharge function at off state.
The UTC
LR9102/A
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.
3
5
CMOS IC
4
2
SOT-23-3
1
1
2
3
(JEDEC TO-236)
SOT-23-5
(JEDEC TO-236)
4
5
5
3
4
1
2
1
2
3
SOT-25
1
SOT-353
1
DFN1616-6
DFN1820-6
FEATURES
LR9102: 50µA (Typ.)
LR9102A: 90µA (Typ.)
0.1µA (Typ.)
0.12V (Typ.)
@I
OUT
=300mA, V
OUT
=2.85V
75dB (Typ.)
@ f=1kHz,V
OUT
=2.85V
±50ppm/°C (Typ.)
* Ultra Supply Current:
* Standby Mode:
* Very Low Dropout Voltage:
* Ripple Rejection:
* Temperature-Drift Coefficient
of Output Voltage:
* Well Line Regulation:
0.02%/ V (Typ.)
* Output Voltage Accuracy:
±1.0%
* Internal Fold Back Protection
50mA (Typ.) @ short mode
Circuit:
* C
IN
=C
OUT
=1µF or more (Ceramic capacitors) are recommended to
be used with this IC
www.unisonic.com.tw
Copyright © 2017 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-923.N
LR9102/A
ABSOLUTE MAXIMUM RATING
PARAMETER
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
SOT-23-3
SOT-23-5
/
SOT-25
SOT-353
DFN1616-6
DFN1820-6
SYMBOL
V
IN
V
CE
V
OUT
I
OUT
RATINGS
6
6
-0.3 ~ V
IN
+0.3
400
280
300
CMOS IC
UNIT
V
V
V
mA
mW
mW
Power Dissipation
P
D
100
mW
138
mW
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
6
40
90
130
2
UNIT
V
mV
V
mV
mA
µA
µA
µA
mA
µA
V
V
µVrms
dB
1.00
0.70
0.40
0.28
0.24
0.20
0.19
0.10
(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
OUT
> 2.0V
×0.99
Output Voltage
V
OUT
V
IN
= Set V
OUT
+1V
V
OUT
≤
2.0V
-20
Input Voltage
V
IN
Load Regulation
∆V
OUT
1mA≤I
OUT
≤150mA
Output Current
I
OUT
300
LR9102
Supply Current
I
SS
I
OUT
=0A
LR9102A
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
1.2
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)
1.0V
≤V
OUT
<1.2V
1.2V
≤V
OUT
<1.5V
1.5V
≤V
OUT
<1.7V
Dropout Voltage
V
D
I
OUT
=300mA
1.7V
≤V
OUT
<2.0V
2.0V
≤V
OUT
<2.5V
2.5V
≤V
OUT
<2.8V
2.8V
≤V
OUT
≤5.0V
∆V
OUT
1.0V≤V
OUT
≤4.0V,
V
SET
+0.5V≤V
IN
≤5V
Line Regulation
∆V
IN
4.0V<V
OUT
≤5.0V,
V
SET
+0.5V≤V
IN
≤6.5V
∆V
OUT
Output Voltage Temperature
-40°С
≤
T
OPR
≤
85°С
∆T
Coefficient
Low Output Nch Tr.
R
LOW
V
IN
=4.0,V
CE
=0V
ON Resistance
20
50
90
0.1
50
0.3
0.3
30
75
0.60
0.38
0.30
0.20
0.17
0.14
0.12
0.02
±50
70
V
%/V
ppm/°
С
Ω
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-923.N
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