Preliminary
RT9204
Dual Regulator - Standard Buck PWM DC-DC and Linear
Power Controller
General Description
The RT9204 is a dual power controllers designed for
high performance graphics cards and computer
applications. The IC integrates a standard buck
controller, a linear regulator driver and protection
functions into a small 8-pin package.
The RT9204 uses a internal compensated voltage
mode PWM control for simple application design. An
internal 0.8V reference allows the output voltage to
be precisely regulated to low voltage requirement. A
fixed 600kHz oscillator reduce the component size for
saving board area.
The RT9204 protects the converter and regulator by
monitoring the output under voltage.
Features
Operate from 5V
0.8V Internal Reference
Voltage Mode PWM Control
Fast Transient Response
Fixed 600kHz Oscillator Frequency
Full 0~100% Duty Cycle
Internal Soft Start
Internal PWM Loop Compensation
Pin Configurations
Part Number
RT9204CS
(Plastic SOP-8)
Pin Configurations
TOP VIEW
GND 1
VCC 2
DRV 3
FBL 4
8 UGATE
7 BOOT
6 SD
5 FB
Applications
Motherboard Power Regulation for Computers
Subsystems Power Supplies
Cable Modems, Set Top Box, and DSL Modems
DSP
and
Core
Communications
processor
Supplies
Memory Power Supplies
Personal Computer Peripherals
Industrial Power Supplies
5V-Input DC-DC Regulators
Low Voltage Distributed Power Supplies
Ordering Information
RT9204
Package type
S : SOP-8
Operating temperature range
C : Commercial standard
DS9204-00 February 2002
www.richtek-ic.com.tw
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
