RT8003
600mA, 2MHz, High-Efficiency Synchronous Buck PWM
Converter
General Description
The RT8003 is a high-efficiency synchronous buck PWM
converter with integrated P-Channel and N-Channel power
MOSFET switches. Capable of delivering 600mA output
current over a wide input voltage range of 2.4V to 5.5V,
the RT8003 is ideally suited for portable applications
powered by a single Li-Ion battery or by 3-cell NiMH/NiCd
batteries. The device operates at 2MHz PWM switching
fixed frequency, can use smaller C
IN
, C
OUT
capacitor and
inductor.
The RT8003 integrates two low R
DS(ON)
230mΩ and 180mΩ
of high and low side switching MOSFETs to reduce board
space, as only resistors and capacitors along with one
inductor are required externally for operation. The RT8003
has adjustable output range down to 0.5V. The other
features include internal soft-start, chip enable, over
temperature and over current protections. It is available in
a space-saving VDFN-10L 3x3 package.
Features
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2.4V to 5.5V Input Voltage Range
Adjustable Output from 0.5V to V
IN
Guaranteed 600mA Output Current
Accurate Reference : 0.5V (±1.5%)
Up to 90% Conversion Efficiency
Typical Quiescent Current : 200µA
Integrated Low R
DS(ON)
High- and Low Side Power
MOSFET Switches : 230mΩ and 180mΩ
Current Mode PWM Operation
Fixed Frequency : 2MHz
100% Maximum Duty Cycle for Lowest Dropout
Internal Soft-Start
No Schottky Diode Required
Over Temperature and Over Current Protection
Small 10-Lead VDFN 3x3 Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
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Ordering Information
RT8003
Package Type
QV : VDFN-10L 3x3 (V-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
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Battery-Powered Equipments
Low Power CPU and DSP Supplies
Digital Cameras and Hard Disks
Protable Instruments and Notebook Computers
Celluar Phones, PDAs, and Handheld PCs
USB-Based DSL Modems and Other Network Interface
Cards
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Pin Configurations
(TOP VIEW)
LX
VDD
NC
NC
EN
1
2
3
4
5
11
10
9
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.
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Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
GND
8
7
9
GND
GND
GND
COMP
FB
VDFN-10L 3x3
DS8003-08 March 2011
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
