1
RT9284A/B
DS9284A/B-07 April 2011
www.richtek.com
Pin Configurations
Applications
z Camera Flash White LED
z Mobile Phone, Smart Phone LED Backlight
z PDA LED Backlight
z Digital Still Camera
z Camcorder
Tiny Package, High Performance, Constant Current
Switching Regulator for White LED
Ordering Information
TOP VIEW
Features
zz
zz
z V
IN
Operating Range : 2.7V to 5.5V
zz
zz
z Maximum Output Voltage up to 20V
zz
zz
z Dimming with Zero-inrush and Wide Frequency
Range of 100 to 100kHz
zz
zz
z Over Voltage Protection
zz
zz
z Output Current up to 100mA at V
OUT
: 12V
zz
zz
z Zero Shutdown Supply Current
zz
zz
z Minimize the External Component
zz
zz
z Small LC Filter
zz
zz
z Internal Soft Start
zz
zz
z RoHS Compliant and 100% Lead (Pb)-Free
General Description
The RT9284A/B is a compact, high efficient and high
integration LED driver. Internal 22V MOSFET can support
2 to 5 White LEDs for backlighting and camera flashing.
Highly integration and internal compensation network
minimizes as 5 external component counts. Optimized
operation frequency can meet the requirement of small
LC filters value and low operation current with high
efficiency. Internal soft start function can reduce the inrush
current. Tiny package type of TSOT-23-5 and TSOT-23-6
packages provide the best solution for PCB space saving
and total BOM cost.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Note :
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.
TSOT-23-6
TSOT-23-5
LX GND FB
VDD EN
4
23
5
LX GND FB
VDD OVP EN
4
23
56
RT9284
Package Type
J5 : TSOT-23-5
J6 : TSOT-23-6
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
OVP Voltage
15 : 15V
20 : 20V
( )
FB Voltage
A : 1.235V
B : 0.25V
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