RT9266B
Tiny Package, High Efficiency, Step-Up DC/DC Converter
General Description
The RT9266B is a compact, high efficiency, and low
voltage step-up DC/DC converter with an Adaptive
Current Mode PWM control loop, includes an error
amplifier, ramp generator, comparator, switch pass
element and driver in which providing a stable and high
efficient operation over a wide range of load currents. It
operates in stable waveforms without external
compensation.
The low start-up input voltage below 1V makes RT9266B
suitable for 1 to 4 battery cells applications with a 500mA
internal switch. The 550kHz high switching rate minimized
the size of external components. Besides, the 25μA low
quiescent current together with high efficiency maintains
long battery lifetime.
Features
1.0V Low Start-up Input Voltage at 1mA Load
25μA Quiescent (Switch-off) Supply Current
μ
Zero Shutdown Mode Supply Current
90% Efficiency
550kHz Switching Frequency at 3.3V V
DD
Providing Flexibility for Using Internal and External
Power Switches
Small
SOT-23-6
Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
PDA
DSC
LCD Panel
RF-Tags
MP3
Portable Instrument
Wireless Equipment
Ordering Information
RT9266B
Package Type
E : SOT-23-6
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Pin Configurations
(TOP VIEW)
FB
6
1
EN
VDD
5
2
LX
4
3
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.
EXT GND
SOT-23-6
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.
Note
: There is no pin1 indicator on top mark for SOT-23-6
type, and pin 1 will be lower left pin when reading top mark
from left to right.
DS9266B-09 March 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
