Preliminary
RT9268
Tiny Package, 1.3MHz, Step-up DC/DC Converter
General Description
The RT9268 is a compact, 1.3MHz, step-up DC/DC
converter with a current mode PWM control loop,
providing a stable and efficient operation without
external compensation.
The high switching rate makes RT9268 suitable for
ADSL applications providing sufficient output current
for variant types of line drivers. The 2V~6V wide
applicable V
IN
range makes it suitable for
applications. This device is available space-saving
SOT-26 package.
The output voltage is set with 2 external resistors.
Both internal 2A switch and driver for driving external
power devices (NMOS or NPN) are provided.
Features
1.3MHz Switching Rate
Below 2V Low Start-up Input Voltage
Sufficient Supply Capability for Supplying
XDSL Line Drivers
Zero Shutdown Mode Supply Current
Providing Flexibility for Using Internal and
External Power Switches
Small SOT-26 Package
Applications
XDSL Line Drivers
USB Devices
PCMCIA Cards
Mini-PCI Cards
Ordering Information
RT9268
Package type
E : SOT-26
Operating temperature range
C: Commercial standard
Pin Configurations
Part Number
RT9268CE
(Plastic SOT-26)
Pin Configurations
TOP VIEW
6
5
4
1
2
3
1.
2.
3.
4.
5.
6.
CE
EXT
GND
LX
VDD
FB
DS9268-00
October 2002
www.richtek.com
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