Document
www.DataSheet4U.com
Preliminary
RT9166/A
300/600mA, Ultra-Fast Transient Response LDO Regulator
General Description
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/A regulators 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. 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.
Features
z z z z z z z z z
Low Quiescent Current (Typically 220µA) Guaranteed 300/600mA Output Current Low Dropout Voltage: 230/580mV at 300/600mA Wide Operating Voltage Ranges: 3V to 5.5V Ultra-Fast Transient Response Tight Load and Line Regulation Current Limiting Protection Thermal Shutdown Protection Only low-ESR Ceramic Capacitor Required for Stability Custom Voltage Available
z
Applications
z z z
Ordering Information
RT9166/A Package Type VL : SOT-23 (L-Type) X : SOT-89 XL : SOT-89 (L-Type) G : SOT-223 GL : SOT-223 (L-Type) Z : TO-92
z z
CD/DVD-ROM, CD/RW Wireless LAN Card/Keyboard/Mouse Battery-Powered Equipment XDSL Router PCMCIA Card
Pin Configurations
(TOP VIEW)
VIN 3 1 GND 2 VOUT
3 2 1 VOUT GND VIN
Operating Temperature Range C : Commercial Standard P : Pb Free with Commercial Standard Output Voltage 12 : 1.2V 13 : 1.3V : 45 : 4.5V 600mA Output Current 300mA Output Current
SOT-23 (L-Type) (RT9166)
TO-92 (RT9166/A)
1
2
3
1
2
3
VOUT GND (TAB)
VIN
GND
VIN VOUT (TAB)
SOT-89
SOT-89 (L-Type)
Marking Information
For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail.
1 2 3
1 2 3
VOUT GND (TAB)
VIN
GND
VIN VOUT (TAB)
SOT-223 DS9166/A-09 October 2004
SOT-223 (L-Type) www.richtek.com 1
RT9166/A
Typical Application Circuit
Preliminary
RT9166/A VIN CIN 1uF VIN VOUT GND COUT 1uF VOUT
Note: To prevent oscillation, a 1µF 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 3.3µF. (see Application Information Section for further details)
Functional Pin Description
Pin Name VIN VOUT GND Pin Function Supply Input Regulator Output Common Ground
Function Block Diagram
VIN Error Amplifier +
VOUT
Current Limiting Sensor
Thermal Shutdown
1.2V
Reference
GND
www.richtek.com 2
DS9166/A-09 October 2004
Preliminary Absolute Maximum Ratings
z z
RT9166/A
(Note 1)
z
z z z z
Supply Input Voltage -------------------------------------------------------------------------------------------------- 6.5V Power Dissipation, PD @ TA = 25°C SOT-23 ------------------------------------------------------------------------------------------------------------------- 0.4W SOT-89 ------------------------------------------------------------------------------------------------------------------- 0.571W SOT-223 ----------------------------------------------------------------------------------------------------------------- 0.740W Package Thermal Resistance (Note 7) SOT-23, θJA ------------------------------------------------------------------------------------------------------------- 250°C/W SOT-89, θJA ------------------------------------------------------------------------------------------------------------- 175°C/W SOT-223, θJA ------------------------------------------------------------------------------------------------------------ 135°C/W Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C Junction Temperature ------------------------------------------------------------------------------------------------- 150°C Storage Temperature Range ---------------------------------------------------------------------------------------- – 65°C to 150°C ESD Susceptibility (Note 2) HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V (Note 3)
Recommended Operating Conditions
z z
Supply Input Voltage -------------------------------------------------------------------------------------------------- 2.8V to 5.5V Junction Temperature Range ---------------------------------------------------------------------------------------- – 40°C to 125°C
Electrical Characteristics
(VIN = VOUT + 1V or VIN = 2.8V whichever is greater, CIN = 1µ.