RT9203 Datasheet, PDF (1/16 Pages) Richtek Technology Corporation – Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller

Preliminary
RT9203/A
Dual Regulators - Synchronous Buck PWM DC-DC and
Linear Controller
General Description
The RT9203/A is a dual-output power controllers designed
for high performance graphics cards and personal
computers. The IC integrates a synchronous buck
controller, a linear controller and protection functions into
a small 8-pin package.
The RT9203/A uses an internal compensated voltage
mode PWM control for simplying design. An internal 0.8V
reference allows the output voltage to be precisely
regulated to meet low output voltage requirement. A fixed
300kHz oscillation frequency reduces the component size
for saving board area.
The RT9203/A also features over voltage protection
(OVP) and under voltage lock-out (UVLO).
Ordering Information
RT9203/A
Package Type
S : SOP-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
UVP : Hiccup Mode
UVP : Latch Mode
Note :
RichTek Pb-free and Green 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.
Features
l Operates at 5V
l 0.8V Internal Reference
l Drives Two N-MOSFET
l Voltage Mode PWM Control
l Fast Transient Response
l Fixed 300kHz Oscillator Frequency
l Dynamic 0 to 100% Duty Cycle
l Internal PWM Loop Compensation
l Internal Soft-Start
l Adaptive Non-Overlapping Gate Driver
l Over-Voltage Protection Uses Lower MOSFET
l RoHS Compliant and 100% Lead (Pb)-Free
Applications
l PC Motherboard
l Cable Modems, Set-Top-Box, and DSL Modems
l DSP and Core Communications Processor Supplies
l Memory Power Supplies
l Personal Computer Peripherals
l Industrial Power Supplies
l 5V Input DC-DC Regulators
l Low Voltage Distributed Power Supplies
l Graphic Cards
Pin Configurations
(TOP VIEW)
BOOT
UGATE 2
GND 3
LGATE 4
8
FB
7
FBL
6
DRV
5
VCC
SOP-8
DS9203/A-10 March 2007
www.richtek.com
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