RT9182
Dual, Low-Noise, 200mA LDO Regulator
General Description
The RT9182 is a dual-channel, low noise, and low dropout
regulator supplying up to 200mA current at each channel.
The output voltage ranges from 1.5V to 3.3V in 100mV
increments and 2% accuracy by operating from a +2.7V
to +5.5V input.
The RT9182 uses an internal PMOS as the pass device,
which consumes 165uA supply current (both LDOs on)
independent of load current and dropout conditions. The
EN1 and EN2 pins control each output respectively. When
both outputs shutdown simultaneously, the chip will be
turn off and consumes nearly zero operation current
which is suitable for battery-power devices. Other
features include a current limiting, and over temperature
protection.
Features
Up to 200mA Output Current (Each LDO)
Dual Shutdown Pins Control Each Output
124uV
RMS
Low Noise Output
Current Limiting and Thermal Protection
Short Circuit Protection
120mV Dropout at 100mA Load
Two LDOs in
SOT-23-6
Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Cellular Phones
Laptop, Notebook, and Palmtop Computers
Battery-powered Equipment
Hand-held Equipment
Wireless LAN
Ordering Information
RT9182
Package Type
ES : SOT-23-6
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
A : 2.8V (Output1), 2.8V (Output2)
B : 3.0V (Output1), 3.0V (Output2)
C : 2.8V (Output1), 3.0V (Output2)
D : 2.8V (Output1), 2.5V (Output2)
E : 2.8V (Output1), 1.8V (Output2)
F : 2.5V (Output1), 2.5V (Output2)
G : 2.5V (Output1), 1.8V (Output2)
H : 3.3V (Output1), 2.5V (Output2)
I : 3.3V (Output1), 1.8V (Output2)
J : 3.0V (Output1), 2.5V (Output2)
K : 3.0V (Output1), 1.8V (Output2)
L : 2.8V (Output1), 1.85V (Output2)
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
Pin Configurations
(TOP VIEW)
VOUT1 VIN
6
1
5
2
EN1
4
3
VOUT2 GND EN2
SOT-23-6
Note
: There is no pin1 indicator on top mark for SOT-23-6
Note :
Richtek Pb-free and Green products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
100%matte tin (Sn) plating.
type, and pin 1 will be lower left pin when reading top mark
from left to right.
DS9182-18 April 2008
www.richtek.com
1
RT9182
Absolute Maximum Ratings
(Note 1)
6.5V
0.4W
250°C/W
260°C
−
65°C to 150°C
Supply Input Voltage ------------------------------------------------------------------------------------------------------
Power Dissipation, P
D
@ T
A
= 25°C
SOT-23-6 --------------------------------------------------------------------------------------------------------------------
Package Thermal Resistance (Note 5)
SOT-23-6,
θ
JA
---------------------------------------------------------------------------------------------------------------
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------
Storage Temperature Range --------------------------------------------------------------------------------------------
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions
(Note 3)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.7V to 5.5V
Enable Input Voltage ------------------------------------------------------------------------------------------------------ 0V to 5.5V
Junction Temperature Range --------------------------------------------------------------------------------------------
−
40°C to 125°C
Electrical Characteristics
(V
IN
= 3.6V, C
IN
= C
OUT
= 2.2uF, EN1 = EN2 = V
IN
, typical values at T
A
= 25°C, for each LDO unless otherwise specified.)
Parameter
Output Voltage Accuracy
(Load Regulation)
Maximum Output Current
Current Limit
Quiescent Current
Symbol
ΔV
OUT
I
MAX
I
LIM
I
G
Test Conditions
I
L
= 1mA to 200mA
Continuous
R
LOAD
= 1Ω
No Load
I
OUT
= 100mA (Both LDOs)
I
OUT
= 1mA
Min
-2
200
500
--
--
--
--
--
-0.2
1.6
--
--
--
--
--
Typ
--
--
--
165
165
1.2
120
255
--
--
--
--
0.01
140
10
124
62
Max
+2
--
1000
260
260
--
--
--
+0.2
--
0.4
100
2
--
--
--
--
Units
%
mA
mA
μA
μA
mV
mV
mV
%/V
V
V
nA
μA
°C
°C
μV
RMS
dB
Dropout Voltage
(Note 4)
V
DROP
I
OUT
= 100mA
I
OUT
= 200mA
V
IN
= (V
OUT
+0.4V or 2.7V) to 5.5V
I
OUT
= 1mA
V
IN
= 2.7V to 5.5V
V
IN
= 2.7V to 5.5V
EN = GND or V
IN
EN1 = EN2 = GND
Line Regulation
EN Input High Threshold
EN Input Low Threshold
EN Input Bias Current
Shutdown Supply Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Output Voltage Noise
Output Voltage AC PSRR
ΔV
LINE
V
IH
V
IL
I
SD
I
GSD
T
SD
ΔT
SD
e
NO
10Hz to 100kHz, C
OUT
= 4.7μF,
I
LOAD
= 1mA
100Hz, C
OUT
= 4.7μF,
I
LOAD
= 100mA
--
--
DS9182-18 April 2008
www.richtek.com
3
RT9182
Note 1.
Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2.
Devices are ESD sensitive. Handling precaution is recommended.
Note 3.
The device is not guaranteed to function outside its operating conditions.
Note 4.
The dropout voltage is defined as V
IN
-V
OUT
, which is measured when V
OUT
is V
OUT(NORMAL)
−
100mV.
Note 5.
θ
JA
is measured in the natural convection at T
A
= 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
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4
DS9182-18 April 2008
嵌入式系统
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