RT9263_07 Datasheet, PDF (1/8 Pages) Richtek Technology Corporation – High Efficiency, Low Supply Current, Step-Up DC/DC Converter

Preliminary
RT9263
High Efficiency, Low Supply Current, Step-Up DC/DC Converter
General Description
The RT9263 is a compact, high efficient, step-up DC/DC
converter with an adaptive current mode PWM control
loop, providing a stable and high efficient operation over
a wide range of load currents. It operates in both
continuous and discontinuous current modes in stable
waveforms without external compensation.
The low start-up input voltage below 1V makes RT9263
suitable for 1 to 4 battery cell applications providing up to
400mA output current. The 550kHz high switching rate
minimized the size of external components. Besides, the
17μA low quiescent current together with high efficiency
maintains long battery lifetime.
Ordering Information
RT9263
Package Type
X5 : SOT-89-5
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
C : Chip enable control
E : Driver for external power devices
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.
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.
Features
z 1.0V Low Start-up Input Voltage
z High Supply Capability to Deliver 3.3V 100mA with
1V Input Voltage
z 17μA Quiescent (Switch-off) Supply Current
z 90% Efficiency
z 550kHz Fixed Switching Rate
z Providing Flexibility for Using Internal and
External Power Switches
z SOT-89-5 Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z PDA
z Portable Instrument
z DSC
Pin Configurations
(TOP VIEW)
EN
1
5
GND
VDD
2
FB
3
4
LX
RT9263CCX5
SOT-89-5
EXT
1
5
GND
VDD
2
FB
3
4
LX
RT9263ECX5
SOT-89-5
DS9263-09 March 2007
www.richtek.com
1