RT9184A
Dual, Ultra-Fast Transient Response, 500mA LDO Regulator
General Description
The RT9184A series are an efficient, precise dual-channel
CMOS LDO regulator optimized for ultra-low-quiescent
applications. Both regulator outputs are capable of sourcing
500mA of output current.
The RT9184A's performance is optimized for CD/DVD-ROM,
CD/RW or wireless communication supply applications.
The RT9184A regulators are stable with output capacitors
as low as 1μF. The other features include ultra low dropout
voltage, high output accuracy, current limiting protection,
and high ripple rejection ratio.
The RT9184A regulators are available in fused SOP-8
package. Key features include current limit, thermal
shutdown, fast transient response, low dropout voltage,
high output accuracy, current limiting protection, and high
ripple rejection ratio.
Features
μ
Low Quiescent Current (Typically 440μA)
Guaranteed 500mA Output Current
Low Dropout Voltage : 600mV at 500mA
Wide Operating Voltage Ranges : 2.8V to 5.5V
Ultra-Fast Transient Response
Tight Load and Line Regulation
Current Limiting Protection
Thermal Shutdown Protection
Only low-ESR Ceramic Capacitors Required for
Stability
Custom Voltage Available
RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9184A-
Package Type
S : SOP-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output 2
Output 1
Applications
CD/DVD-ROM, CD/RW
Wireless LAN Card/Keyboard/Mouse
Battery-Powered Equipment
XDSL Router
Note :
The output 2 is designated to larger than or equal to
output 1 in voltage code order below, i.e.
V
OUT2
≥
V
OUT1
.
For example, the part number of RT9184A-FNCS is
assigned for 2.5V
OUT1
/3.3V
OUT2
, contrary to the part
number of RT9184A-NFCS is opposite to the rule and
doesn't exist in the system.
Voltage Code for Both Outputs :
2: 1.2V
A: 2.0V
B: 2.1V
C: 2.2V
:
J: 2.9V
K: 3.0V
L: 3.1V
M: 3.2V
:
T: 3.9V
U: 4.0V
V: 4.1V
W: 4.2V
:
Z: 4.5V
Pin Configurations
(TOP VIEW)
VOUT1
VIN1
VOUT2
VIN2
2
3
4
8
7
6
5
GND
GND
GND
GND
SOP-8
3: 1.3V
4: 1.4V
:
9: 1.9V
RichTek Pb-free and Gree 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.
DS9184A-08 March 2007
www.richtek.com
1
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