UNISONIC TECHNOLOGIES CO., LTD
LR9101
Preliminary
CMOS IC
LOW NOISE 300mA LDO
REGULATOR
DESCRIPTION
The UTC
LR9101
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
LR9101,
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
LR9101
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
LR9101.
The UTC
LR9101
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.
FEATURES
* Supply Current:
* Standby Mode:
* Very Low Dropout Voltage:
*
*
*
*
50µA (Typ.)
0.1µA (Typ.)
0.17V (Typ.)
@I
OUT
=150mA, V
OUT
=2.5V
Ripple Rejection:
70dB (Typ.)
@f=1kHz,V
OUT
=2.5V
Well Line Regulation:
0.02%/ V (Typ.)
Output Voltage Accuracy:
±1.0% (Typ.)
C
IN
=C
OUT
=1µF or more (Ceramic capacitors) are recommended to
be used with this IC
ORDERING INFORMATION
Ordering Number
Package
SOT-23-5
Packing
Tape Reel
Lead Free
Halogen Free
LR9101L-xx-AE5-R
LR9101G-xx-AE5-R
Note: xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
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QW-R502-A14.a
LR9101
ABSOLUTE MAXIMUM RATING
PARAMETER
Preliminary
CMOS IC
SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
6
V
Input Voltage (CE Pin)
V
CE
6
V
Output Voltage
V
OUT
-0.3~ V
IN
+0.3
V
Output Current
I
OUT
400
mA
Power Dissipation
P
D
420
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
MIN
×0.99
TYP
±20
20
300
50
0.1
200
0.3
1.2
1.1
30
70
0.40
0.24
0.21
0.19
0.17
0.15
0.02
0.10
2
6
40
MAX
×1.01
UNIT
V
V
V
mV
mA
µA
µA
mA
µA
V
V
µVrms
dB
(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
V
OUT
> 2.0V
Output Voltage
V
OUT
V
IN
= Set V
OUT
+1V,
V
OUT
≤
2.0V
Input Voltage
V
IN
Load Regulation
∆V
OUT
1mA≤I
OUT
≤150mA
Output Current
I
OUT
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
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
2.8V≤V
OUT
≤5.0V
∆V
OUT
1.2V≤V
OUT
≤4.0V,
Line Regulation
∆V
IN
V
SET
+0.5V≤V
IN
≤5V
V
%/V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-A14.a
LR9101
TEST CIRCUIT
Preliminary
CMOS IC
V
IN
C1
1.0µF
CE
UTC
LR9101
V
OUT
C2
1.0µF
V
V
OUT
I
OUT
C1
1.0µF
V
IN
V
OUT
UTC
LR9101
C2
1.0µF
A I
SS
GND
CE
GND
Basic Test Circuit
Test Circuit for Supply Current
TYPICAL APPLICATION CIRCUIT
IN
V
IN
CE
UTC
LR9101
GND
V
OUT
OUT
C2
1.0μF
C1
1.0μF
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
www.unisonic.com.tw
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QW-R502-A14.a
Test/Measurement
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