RT9002A_11 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
Features
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
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 4V
z RoHS Compliant and 100% Lead (Pb)-Free
smallest components.
Applications
Ordering Information
RT9002A/B/C -
z CD/DVD-ROM, CD/RW
z Wireless LAN Card/Keyboard/Mouse
Package Type
S : SOP-8
z Battery-Powered Equipment
z XDSL Router
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Pin
Configurations
Note :
Output Voltage : VOUT1/VOUT2
A : 2.5V/3.3V
B : 1.5V/2.8V
C : 2.5V/3.3V
Richtek 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.
(TOP VIEW)
VIN1
VOUT1
2
Cd
3
VIN2
4
8
EN1
7
GND
6
VDOUT
5
VOUT2
SOP-8
Typical Application Circuit
V_IN1
C_IN1
1uF
Chip Enable
V_IN2
CIN2
1uF
1 _VIN1
VOUT1 ²
RT9002A/B/C
3
Cd
Cd
8 _EN1
VDOUT ⁶
4 _VIN2
VOUT2 ⁵
GND
7
DS9002ABC-04 April 2011
C_OUT1
1uF
R1
100k
C_OUT2
1uF
V_OUT1
V_IN2
V_DOUT
V_OUT2
www.richtek.com
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