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RT9204 Datasheet

Dual Regulators - Standard Buck PWM DC-DC and Linear Controller

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Preliminary
RT9204/A
Dual Regulators - Standard Buck PWM DC-DC and
Linear Controller
General Description
The RT9204/A 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/A uses an 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/A protects the converter and regulator by
monitoring the output under voltage.
Ordering Information
RT9204/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 Operate from 5V
l 0.8V Internal Reference
l Voltage Mode PWM Control
l Fast Transient Response
l Fixed 600kHz Oscillator Frequency
l Full 0 to 100% Duty Cycle
l Internal Soft Start
l Internal PWM Loop Compensation
l RoHS Compliant and 100% Lead (Pb)-Free
Applications
l Motherboard Power Regulation for Computers
l Subsystems Power Supplies
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
Pin Configurations
(TOP VIEW)
GND
VCC
DRV
FBL
2
3
4
8 UGATE
7 BOOT
6 SD
5 FB
SOP-8
DS9204/A-08 March 2007
www.richtek.com
1
Free Datasheet http://www.datasheet4u.com/


  Richtek Technology Electronic Components Datasheet  

RT9204 Datasheet

Dual Regulators - Standard Buck PWM DC-DC and Linear Controller

No Preview Available !

RT9204/A
Typical Application Circuit
Preliminary
VAUX
3.3V
Q1
2SD1802
VOUT2
1.6V
C6
220uF
R4
100
R5 C5
100 1uF
R1
10
1 GND
2 VCC
UGATE 8
BOOT 7
3 DRV
SD 6
4 FBL
FB 5
RT9204/A
BAT54A
C3
0.1uF
VOUT1
2.5V
R3
250
R2
120
C7
10nF
L1
5uH
C4
1000uF
5V
MU
D1
SS34
C2
1uF
C1
470uF
Figure1. RT9204/A powered from 5V only
5V
R1
0
VAUX
3.3V
C7
1uF
Q1
Suggest use Transistor
VOUT2
1.6V
C6
220uF
2SD5706
R4
100
R5
100
1 GND
2 VCC
UGATE 8
BOOT 7
3 DRV
SD 6
4 FBL
FB 5
RT9204/A
R6
C5 10
1uF
VOUT1
2.5V
R3
250
R2
120
C7
10nF
12V
L1
5uH
C4
1000uF
5V
MU
D1
SS34
C2
1uF
C1
470uF
Figure2. RT9204/A powered from 12V
www.richtek.com
2
DS9204/A-08 March 2007
Free Datasheet http://www.datasheet4u.com/


Part Number RT9204
Description Dual Regulators - Standard Buck PWM DC-DC and Linear Controller
Maker Richtek
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RT9204 Datasheet PDF






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