RT9301
3-Channel Low Dropout RGB LED Driver
General Description
The RT9301 is a
3-Channel current source driver for RGB
LED. It is easy to be designed in applications that need
mixing RGB light source for multi-color output.
The RT9301 also provide users with great flexibility and
device performance. It uses a external resistor to set the
bias current for three LEDs, which are matched to 3%.
Users can adjust the output current from 2mA to 50mA by
setting the ISET resistor.
The RT9301 features very low dropout and under voltage
lockout protection.
It is available in
a space-saving
TSOT-
23-8 package.
Features
Input Voltage Range : 2.8V to 5.5V
Low 60/45mV Dropout at 20/15mA
Individual Current Setting by External Resistor
Individual On/Off Control by Baseband MPU
Up to 50mA LED Bias Current
Simple LED Brightness Control
3% LED Current Matching
Low 0.1uA Shutdown Current
UVLO Protection
Tiny TSOT-23-8 Package
Applications
Mobile phone, Smart Phone Multi-color LED Backlight
Camera Flash White LED
LCD Display Modules
Keypad Backlight
Ordering Information
RT9301
Package Type
J8 : TSOT-23-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Pin Configurations
(TOP VIEW)
ISET1
ISET2
LED2
LED1
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.
8
1
LED3
7
2
GND
6
3
VIN
5
4
ISET3
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.
TSOT-23-8
Note
: There is no pin1 indicator on top mark for TSOT-23-8
type, and pin 1 will be lower left pin when reading top mark
from left to right.
DS9301-02 March 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
