RT9185 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – Triple, Ultra-Fast CMOS LDO Regulator

RT9185
Triple, Ultra-Fast CMOS LDO Regulator
General Description
Features
The RT9185 series are efficient, precise triple-channel
CMOS LDO regulators specifically designed for mother-
board application. The device is intended to powering the
standby voltage in which 3.3V_PCI, 2.5V_Clock and
1.8V_ICH2 or 1.5V_ICH4 core voltage of the PC based
computer system. Moreover, it is also optimized for CD/
DVD-ROM, CD/RW, XDSL Router or IA equipments
applications. The regulator outputs are capable of sourcing
1.5A, 0.8A and 0.3A of output current respectively.
The RT9185 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications. The other features include faster transient
response, low dropout voltage, high output accuracy,
current limiting and thermal shutdown protections.
The RT9185 regulators are available in fused SOP-8,
5-lead TO-252 and 5-lead TO-263 packages.
Ordering Information
RT9185
Package Type
S : SOP-8
L5 : TO-252-5
M5 : TO-263-5
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
VOUT3
A : 1.8V
B : 1.5V
Other voltage versions please
contact RichTek for detail.
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.
z Fixed Output Voltages : 3.35V at 1.5A, 2.55V at 0.8A
and 1.5V or 1.8V at 0.3A
z Low Quiescent Current (Typically 0.4mA)
z Operating Voltage Ranges : 3.5V to 5.5V
z Ultra-Fast Transient Response
z Tight Load and Line Regulation
z Current Limiting Protection
z Thermal Shutdown Protection
z Only Low-ESR Ceramic Capacitors Required for
Stability
z Custom Voltage Available
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Mother-board Power Supply
z CD/DVD-ROM, CD/RW
z XDSL Router
z IA Equipments
z Cable Modems
Pin Configurations
(TOP VIEW)
VOUT1
VDD
VOUT2
VOUT3
8
2
7
3
6
4
5
SOP-8
GND
GND
GND
GND
5
4
3
2
TO-252-5
VOUT3
VOUT2
GND (TAB)
VDD
VOUT1
5
VOUT3
4
VOUT2
3
GND (TAB)
2
VDD
VOUT1
TO-263-5
DS9185-11 March 2007
www.richtek.com
1