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RT9266 Datasheet

  • RT9266

  • Step-up DC/DC Converter

  • 417.54KB

  • 14頁

  • ETC

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Preliminary
RT9266
Tiny Package, High Efficiency, Step-up DC/DC Converter
General Description
The RT9266 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
RT9266 suitable for 1 to 4 battery cells applications
of providing up to 300mA output current. The
450KHz high switching rate minimized the size of
external components. Besides, the 17碌A low
quiescent current together with high efficiency
maintains long battery lifetime.
The output voltage is set with two external resistors.
Both internal 2A switch and driver for driving
external power devices (NMOS or NPN) are
provided.
Features
1.0V Low Start-up Input Voltage
High Supply Capability to Deliver 3.3V 100mA
with 1 Alkaline Cell
17碌A Quiescent (Switch-off) Supply Current
Zero Shutdown Mode Supply Current
90% Efficiency
450KHz Fixed Switching Frequency
Providing Flexibility for Using Internal and
External Power Switches
Small SOT-26 & SOT89-5 Package
Applications
PDA
DSC
LCD Panel
RF-Tags
MP3
Portable Instrument
Wireless Equipment
Pin Configurations
Part Number
RT9266CE
(Plastic SOT-26)
Pin Configurations
TOP VIEW
6
5
4
Ordering Information
RT9266
Package Type
E : SOT-26
X5 : SOT89-5
Operating Temperature Range
C: Commercial Standard
1
2
3
1.
2.
3.
4.
5.
6.
CE
EXT
GND
LX
VDD
FB
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.
RT9266CX5
(Plastic SOT89-5)
5
4
1
2
3
TOP VIEW
1. CE
2. VDD
3. FB
4. LX
5. GND
DS9266-02
February 2003
www.richtek.com
1

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