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 are zz z zz Low Dropout Voltage : 230/580mV at 300/600mA 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, SOT-89, SOT-223, TO-92 Applications and TO-252 packages. z CD/DVD-ROM, CD/RW z Wireless LAN Card/Keyboard/Mouse Ordering Information z Battery-Powered Equipment RT9166/A- Package Type z XDSL Router VL : SOT-23-3 (L-Type) z PCMCIA Card 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, otherwise visit our website for detail. Operating Temperature Range P : Pb Free with Commercial Standard Pin Configurations G : Green (Halogen Free with Commer- cial Standard) (TOP VIEW) Output Voltage VIN 12 : 1.2V 13 : 1.3V 3 : 12 45 : 4.5V 1B : 1.25V GND VOUT SOT-23-3 (L-Type) 600mA Output Current (RT9166) 300mA Output Current Note : 3 VOUT RichTek Pb-free and Green 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. (RT9166/A) 100%matte tin (Sn) plating. DS9166/A-18 June 2007 www.richtek.com 1+ RT9166/A 12 3 12 3 1 3 2 1 23 1 23 VOUT GND GND VIN VIN VOUT GND GND VIN VOUT (TAB) (TAB) VOUT GND VIN (TAB) (TAB) SOT-89 SOT-89 (L-Type) VOUT VIN 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 www.richtek.com DS9166/A-18 June 2007 2