RT9166/A
300/600mA, Ultra-Fast Transient Response LDO Regulator
General Description Features
zz z zz Low Quiescent Current (Typically 220A)
The RT9166/A series are CMOS low dropout regulators
zz z zz Guaranteed 300/600mA Output Current
optimized for ultra-fast transient response. The devices
zz z zz Low Dropout Voltage : 230/580mV at 300/600mA
are capable of supplying 300mA or 600mA of output current
zz z zz Wide Operating Voltage Ranges : 3V to 5.5V
with a dropout voltage of 230mV or 580mV respectively.
zz z zz Ultra-Fast Transient Response
The RT9166/A series are is optimized for CD/DVD-ROM,
zz z zz Tight Load and Line Regulation
CD/RW or wireless communication supply applications.
zz z zz Current Limiting Protection
The RT9166/A regulators are stable with output capacitors
zz z zz Thermal Shutdown Protection
as low as 1F. The other features include ultra low dropout
zz z zz Only Low-ESR Ceramic Capacitor Required for
voltage, high output accuracy, current limiting protection,
Stability
and high ripple rejection ratio.
zz z zz Custom Voltage Available
The devices are available in fixed output voltages range of
zz z zz RoHS Compliant and 100% Lead (Pb)-Free
1.2V to 4.5V with 0.1V per step. The RT9166/A regulators
are available in 3-lead SOT-23 (RT9166 only), SOT-89,
Applications
SOT-223, TO-92 and TO-252 packages.
z CD/DVD-ROM, CD/RW
z Wireless LAN Card/Keyboard/Mouse
Ordering Information
z Battery-Powered Equipment
RT9166/A-
z XDSL Router
Package Type
z PCMCIA Card
VL : SOT-23-3 (L-Type) (RT9166 Only)
X : SOT-89
XL : SOT-89 (L-Type)
Marking Information
G : SOT-223
GL : SOT-223 (L-Type) For marking information, contact our sales representative
Z : TO-92
directly or through a Richtek distributor located in your
L : TO-252
area.
Lead Plating System
P : Pb Free
Pin Configurations
G : Green (Halogen Free and Pb Free)
(TOP VIEW)
Output Voltage
12 : 1.2V
VIN
13 : 1.3V
3
:
45 : 4.5V
2
1B : 1.25V
GND VOUT
600mA Output Current
SOT-23-3 (L-Type) (RT9166)
300mA Output Current
Note :
3 VOUT
Richtek products are :
2 GND
` RoHS compliant and compatible with the current require-
1
VIN
ments of IPC/JEDEC J-STD-020.
TO-92
` Suitable for use in SnPb or Pb-free soldering processes.
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
DS9166/A-23 June 2012 www.richtek.com
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RT9166/A
12 3
12 3
1 23
1 23 1 2 3
GND
VOUT GND VIN GND VIN VOUT
GND VIN VOUT
VOUT GND VIN
VOUT VIN
(TAB) (TAB)
(TAB) (TAB)
SOT-89 SOT-89 (L-Type) SOT-223 SOT-223 (L-Type) TO-252
Typical Application Circuit
RT9166/A
V
VIN VOUT V
IN
OUT
C
C GND
OUT
IN
1uF
1uF
Note: To prevent oscillation, a 1F minimum X7R or X5R dielectric is strongly recommended if ceramics are
used as input/output capacitors. When using the Y5V dielectric, the minimum value of the input/output
capacitance that can be used for stable over full operating temperature range is 3.3F. (see Application
Information Section for further details)
Functional Pin Description
Pin Name Pin Function
VIN Supply Input.
VOUT Regulator Output.
GND Common Ground.
Function Block Diagram
VIN VOUT
Error
Current
Amplifier
Limiting
Sensor -
Thermal
1.2V
Shutdown
Reference
GND
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
www.richtek.com DS9166/A-23 June 2012
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