RT9002A Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – Dual Low-Dropout Regulator with Detector

RT9002A/B/C
Dual Low-Dropout Regulator with Detector
General Description
The RT9002A/B/C is a dual-channel, low noise, and low
dropout regulator. The first regulator is capable of sourcing
240mA, while the second regulator can source up to
500mA and includes a voltage detection function. The
RT9002A/B/C performance is optimized for CD/DVD-ROM,
CD/RW or wireless communication supply applications.
The RT9002A/B/C regulator is stable with output capacitors
as low as 1μF. The other features include high output
accuracy, ultra-fast transient response, tight load and line
regulation, current limiting/thermal protection and high
ripple rejection ratio. The RT9002A/B/C is available in
SOP-8 package requiring minimum board space and
smallest components.
Ordering Information
RT9002A/B/C -
Package Type
S : SOP-8
Note :
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage : VOUT1/VOUT2
A : 2.5V/3.3V
B : 1.5V/2.8V
C : 2.5V/3.3V
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.
Features
z Low Quiescent Current (Typically 70μA)
z Wide Operating Voltage Ranges : 2.5V to 5.5V
z Ultra-Fast Transient Response
z Tight Load and Line Regulation
z Current Limiting Protection
z Thermal Shutdown Protection
z Only low-ESR Ceramic Capacitors Required for
Stability
z Custom LDO V_OUT1, V_OUT2 Voltage Available from
1.5V to 3.3V
z Custom V_IN Detector Available from 3.5V to 4.0V
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z CD/DVD-ROM, CD/RW
z Wireless LAN Card/Keyboard/Mouse
z Battery-Powered Equipment
z XDSL Router
Pin Configurations
(TOP VIEW)
VIN1
VOUT1
Cd
VIN2
8
2
7
3
6
4
5
SOP-8
EN1
GND
VDOUT
VOUT2
Typical Application Circuit
V_IN1
C_IN1
1uF
Chip Enable
V_IN2
CIN2
1uF
DS9002ABC-03 March 2007
1 _VIN1
2
VOUT1
RT9002A/B/C
3
Cd
Cd
8 _EN1
VDOUT ⁶
4 _VIN2
VOUT2 ⁵
GND
7
C_OUT1
1uF
R1
100k
C_OUT2
1uF
V_OUT1
V_IN2
V_DOUT
V_OUT2
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