Preliminary
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 +6.5V input.
The RT9182 uses an internal PMOS as the pass
device, which consumes 165碌A(chǔ) supply current (both
LDOs on) independent of load current and dropout
conditions. The SHDN pin controls both outputs
simultaneously and consumes nearly zero operation
current in the disable mode making the IC suitable
for battery-power devices. Other features include a
reference voltage bypass pin to improve low noise
performance, current limiting, and over temperature
protection.
Features
鈥?/div>
Up to 200mA Output Current (Each LDO)
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Shutdown Function
鈥?/div>
29碌V
RMS
Low Noise Output
碌
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Current Limiting and Thermal Protection
鈥?/div>
Short Circuit Protection
鈥?/div>
120mV Dropout at 100mA Load
鈥?/div>
Two LDOs in SOT-26 Package
Applications
Cellular Phones
Laptop, Notebook, and Palmtop Computers
Battery-powered Equipment
Hand-held Equipment
Pin Configurations
Part Number
RT9182 CE
(Plastic SOT-26)
6
5
4
Pin Configurations
TOP VIEW
1.
2.
3.
4.
5.
6.
VOUT2
GND
BP
SHDN
VIN
VOUT1
Ordering Information
RT9182
Package type
E : SOT-26
Operating temperature range
C : Commercial standard
Output voltage
A : 2.8V (Output1), 2.8V (Output2)
B : 3.0V (Output1), 3.0V (Output2)
1
2
3
Typical Application Circuit
ON
OFF
V
OUT2
2.2碌F
BP
GND
10nF
SHDN
VOUT2 VOUT1
V
OUT1
2.2碌F
V
IN
2.2碌F
Marking Information
Part Number
RT9182ACE
RT9182BCE
Marking
2M
2Q
RT9182
VIN
DS9182-02 April 2002
www.richtek-ic.com.tw
1
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