105990091 Seeed Studio

RT9193 300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator General Description Features zz z zz Ultra-Low-Noise for RF Application The RT9193 is designed for portable RF and wireless zz z zz Ultra-Fast Response in Line/Load Transient applications with demanding performance and space zz z zz Quick Start-Up (Typically 50s) requirements. The RT9193 performance is optimized for zz z zz < 0.01A Standby Current When Shutdown battery-powered systems to deliver ultra low noise and zz z zz Low Dropout : 220mV 300mA low quiescent current. A noise bypass pin is available for zz z zz Wide Operating Voltage Ranges : 2.5V to 5.5V further reduction of output noise. Regulator ground current zz z zz TTL-Logic-Controlled Shutdown Input increases only slightly in dropout, further prolonging the zz z zz Low Temperature Coefficient battery life. The RT9193 also works with low-ESR ceramic zz z zz Current Limiting Protection capacitors, reducing the amount of board space necessary zz z zz Thermal Shutdown Protection for power applications, critical in hand-held wireless zz z zz Only 1F Output Capacitor Required for Stability devices. The RT9193 consumes less than 0.01A in zz z zz High Power Supply Rejection Ratio shutdown mode and has fast turn-on time less than 50s. zz z zz Custom Voltage Available The other features include ultra low dropout voltage, high zz z zz RoHS Compliant and 100% Lead (Pb)-Free output accuracy, current limiting protection, and high ripple rejection ratio. Available in the 5-lead of SC-70, SOT-23 Applications and WDFN-6L 2x2 packages. z CDMA/GSM Cellular Handsets z Battery-Powered Equipment Ordering Information z Laptop, Palmtops, Notebook Computers RT9193- z Hand-Held Instruments Package Type U5 : SC-70-5 z PCMCIA Cards B : SOT-23-5 z Portable Information Appliances QW : WDFN-6L 2x2 (W-Type) Operating Temperature Range Marking Information P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- For marking information, contact our sales representative cial Standard) directly or through a RichTek distributor located in your Output Voltage area, otherwise visit our website for detail. 15 : 1.5V 16 : 1.6V : Pin Configurations 49 : 4.9V (TOP VIEW) 50 : 5.0V 1H : 1.85V 2H : 2.85V 1 4G : 4.75V VIN 5 VOUT 1 6 EN BP Note : GND 2 2 5 GND NC RichTek Pb-free and Green products are : 3 4 VIN VOUT EN 3 4 BP RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. SC-70-5/SOT-23-5 WDFN-6L 2x2 Suitable for use in SnPb or Pb-free soldering processes. 100% matte tin (Sn) plating. DS9193-09 March 2007 www.richtek.com 1- RT9193 Typical Application Circuit RT9193 V IN VIN VOUT V OUT C C IN OUT GND 1uF/X7R 1uF/X7R Chip Enable EN BP C BP 22nF Functional Pin Description Pin Name Pin Function Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100k EN resistor connected to GND when the control signal is floating. BP Reference Noise Bypass GND Ground VOUT Output Voltage VIN Power Input Voltage Function Block Diagram EN Shutdown VIN Quick and Start Logic Control V BP REF + MOS Driver Error Amplifier VOUT Current-Limit and Thermal Protection GND www.richtek.com DS9193-09 March 2007 2