RT9205_07 Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller

Preliminary
RT9205/A
Dual Regulators - Synchronous Buck PWM DC-DC and
Linear Controller
General Description
The RT9205/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 14-pin package.
The RT9205/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 RT9205/A also features over voltage protection
(OVP) and under voltage lock-out (UVLO).
Ordering Information
RT9205/A
Package Type
S : SOP-14
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
UVP : Hiccup Node
UVP : Latch Mode
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 XDSL 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
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.
Pin Configurations
(TOP VIEW)
LGATE
PGND 2
GND 3
VCC 4
DRV 5
FBL 6
NC
7
14 UGATE
13 BOOT
12
NC
11 NC
10 NC
9
FB
8 NC
SOP-14
DS9205/A-08 March 2007
www.richtek.com
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