RT9263CGX5 RICHTEK [Richtek Technology Corporation], RT9263CGX5 Datasheet

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RT9263CGX5

Manufacturer Part Number
RT9263CGX5
Description
High Efficiency, Low Supply Current, Step-Up DC/DC Converter
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet
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
Note :
RichTek Pb-free and Green products are :
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.
DS9263-09 March 2007
RT9263
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
100%matte tin (Sn) plating.
ments of IPC/JEDEC J-STD-020.
Package Type
X5 : SOT-89-5
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
C : Chip enable control
E : Driver for external power devices
cial Standard)
Preliminary
Features
Applications
Pin Configurations
1.0V Low Start-up Input Voltage
High Supply Capability to Deliver 3.3V 100mA with
1V Input Voltage
17μ μ μ μ μ A Quiescent (Switch-off) Supply Current
90% Efficiency
550kHz Fixed Switching Rate
Providing Flexibility for Using Internal and
External Power Switches
SOT-89-5 Package
RoHS Compliant and 100% Lead (Pb)-Free
PDA
Portable Instrument
DSC
VDD
VDD
EXT
FB
EN
FB
RT9263CCX5
RT9263ECX5
(TOP VIEW)
SOT-89-5
SOT-89-5
1
2
3
1
2
3
5
4
5
4
GND
LX
GND
LX
RT9263
www.richtek.com
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RT9263CGX5 Summary of contents

Page 1

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 ...

Page 2

RT9263 Typical Application Circuit V IN Figure 1. RT9263CCX5 Typical Application for Portable Instruments below 400mA 100uF Figure 3. High Voltage Application (Rm should be added when IL > 100mA) www.richtek.com 2 Preliminary VDD ...

Page 3

100uF Chip Enable Figure 4. High Voltage Application with Shutdown Control Function Block Diagram VDD FB EN VDD FB DS9263-09 March 2007 Preliminary L1 10uF Q1 N MOS VDD LX RT9263ECX5 FB EN GND RT9263CCX5 - ...

Page 4

RT9263 Functional Pin Description Pin No. RT9263CCX5 RT9263ECX5 -- www.richtek.com 4 Preliminary Pin Name Pin Function Output Pin for Driving External NMOS or NPN EXT When driving an NPN, ...

Page 5

Absolute Maximum Ratings Supply Voltage ----------------------------------------------------------------------------------------------------- LX Pin Switch Voltage -------------------------------------------------------------------------------------------- Other I/O Pin Voltages ------------------------------------------------------------------------------------------- LX Pin Switch Current -------------------------------------------------------------------------------------------- 2.5A EXT Pin Driver Current -------------------------------------------------------------------------------------------- 30mA Power Dissipation 25° SOT89-5 ------------------------------------------------------------------------------------------------------------- 0.5W ...

Page 6

RT9263 Typical Operating Characteristics Efficiency for 3.3V Output 100 3. Refer to Application Circuit Figure 1 20 0.01 0 LOAD No Load Current ...

Page 7

Application Information Output Voltage Setting Referring to application circuits Figure 1 to Figure 4 the output voltage of the switching regulator (V set with Equation (1). R1 × (1+ ) 1.25V OUT1 R2 Feedback Loop Design Referring to ...

Page 8

RT9263 Outline Dimension Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com 8 Preliminary ...

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