RT9363A Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – 3 Channels 90mA x1/x2 Charge Pump White LED Driver

RT9363A
3 Channels 90mA x1/x2 Charge Pump White LED Driver
General Description
The RT9363A is a compact, high efficient and highly
integrated charge pump white LED driver. It maintains the
highest efficiency by utilizing a x1/x2 fractional charge
pump and low dropout current regulators. The RT9363A
supports up to 3 white LEDs and regulates a constant
current for uniform intensity. The part implements a 4-bit
DAC for brightness control. Users can select external R_SET
or internal R_SET by ISET pin. The dimming of white LEDs'
current can be achieved by applying a pulse signal to the
EN pin. There are totally 16 steps of current could be set
by users. The part can support 15mA to 30mA for the 100%
current setting. Users also can use the internal R_SET for
100% current setting of 20mA just by connecting the ISET
pin to V_IN. The operating voltage range is from 2.8V to
5.5V. Internal soft start circuitry effectively reduces the in-
rush current while both start-up and mode transition. The
load is disconnected from V_IN while shutdown and the
shutdown current is less than 1uA.
RT9363A is available in a WDFN -10L 3x3 package.
Ordering Information
RT9363A
Package Type
QW : WDFN-10L 3x3 (W-Type)
Note :
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
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.
Features
z Over 80% Average Efficiency Over Battery Life
z Support Up to 3 White LEDs
z 80mV Typical Current Source Dropout
z Support Up to 90mA Output Current
z 1% Typical LED Current Accuracy
z 0.7% Typical LED Current Matching
z Soft Start Function
z Automatic Charge Pump Mode Selection
z 1MHz Random Frequency Oscillator
z Over Voltage Protection
z 16-Step Brightness Control
z Low Input Noise and EMI
z Low 1uA Shutdown Current
z Flexible Current Setting
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Mobile Phone, DSC, MP3
z White LED Backlighting
z LCDDisplay Supply
Pin Configurations
(TOP VIEW)
LED3 1
LED2 2
LED1 3
CN 4
CP 5
GND
11
10 EN
9 ISET
8 VOUT
7 VIN
GND
WDFN-10L 3x3
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9363A-03 April 2011
www.richtek.com
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