Preliminary
RT9166/A
300/600mA, Ultra-Fast Transient Response LDO Regulator
General Description
Features
z Low Quiescent Current (Typically 220µA)
z Guaranteed 300/600mA Output Current
z Low Dropout Voltage: 230/580mV at 300/600mA
z Wide Operating Voltage Ranges: 3V to 5.5V
z Ultra-Fast Transient Response
z Tight Load and Line Regulation
z Current Limiting Protection
The RT9166/A series are CMOS low dropout regulators
optimized for ultra-fast transient response. The devices are
capable of supplying 300mA or 600mA of output current
with a dropout voltage of 230mV or 580mV respectively.
The RT9166/A series are is optimized for CD/DVD-ROM,
CD/RW or wireless communication supply applications.
The RT9166/Aregulators are stable with output capacitors
as low as 1µF. The other features include ultra low dropout
voltage, high output accuracy, current limiting protection,
and high ripple rejection ratio.
z Thermal Shutdown Protection
z Only low-ESR Ceramic Capacitor Required for
Stability
z Custom Voltage Available
The devices are available in fixed output voltages range of
1.2V to 4.5V with 0.1V per step. The RT9166/A regulators
are available in 3-lead SOT-23, SOT-89, SOT-223 and TO-92
packages.
Applications
z CD/DVD-ROM, CD/RW
z Wireless LAN Card/Keyboard/Mouse
z Battery-Powered Equipment
z XDSL Router
Ordering Information
z PCMCIA Card
RT9166/A -
Pin Configurations
Package Type
VL : SOT-23 (L-Type)
X : SOT-89
(TOP VIEW)
VIN
XL : SOT-89 (L-Type)
G : SOT-223
GL : SOT-223 (L-Type)
Z : TO-92
3
VOUT
GND
VIN
3
2
1
1
2
TO-92
GND
VOUT
(RT9166/A)
SOT-23 (L-Type)
(RT9166)
Operating Temperature Range
C : Commercial Standard
P : Pb Free with Commercial Standard
Output Voltage
12 : 1.2V
13 : 1.3V
:
1
2
3
1
2
3
GND
VOUT
VIN
(TAB)
GND VIN
(TAB)
VOUT
45 : 4.5V
SOT-89 (L-Type)
SOT-89
600mA Output Current
300mA Output Current
Marking Information
1
2
3
1
3
2
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
VOUT
GND
VIN
(TAB)
VOUT GND
(TAB)
VIN
SOT-223 (L-Type)
SOT-223
DS9166/A-09 October 2004
www.richtek.com
1