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 CIN, COUT capacitor and
inductor.
The RT8003 integrates two low RDS(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.
Ordering Information
RT8003
Package Type
QV : VDFN-10L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
Note :
RichTek Pb-free 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
l 2.4V to 5.5V Input Voltage Range
l Adjustable Output from 0.5V to VIN
l Guaranteed 600mA Output Current
l Accurate Reference : 0.5V (±1.5%)
l Up to 90% Conversion Efficiency
l Typical Quiescent Current : 200µA
l Integrated Low RDS(ON) High- and Low-Side Power
MOSFET Switches: 230mΩ and 180mΩ
l Current Mode PWM Operation
l Fixed Frequency : 2MHz
l 100% Maximum Duty Cycle for Lowest Dropout
l Internal Soft-Start
l No Schottky Diode Required
l Over-Temperature and Over-Current Protection
l Small 10-Lead VDFN 3x3 Package
l RoHS Compliant and 100% Lead (Pb)-Free
Applications
l Battery-Powered Equipments
l Low Power CPU and DSP Supplies
l Digital Cameras and Hard Disks
l Protable Instruments and Notebook Computers
l Celluar Phones, PDAs, and Handheld PCs
l USB-Based DSL Modems and Other Network Interface
Cards
Pin Configurations
(TOP VIEW)
LX 1
VDD 2
NC 3
NC 4
EN 5
GND
10 GND
9 GND
8 GND
7 COMP
FB
VDFN-10L 3x3
DS8003-03 November 2005
www.richtek.com
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