RT9167-18GB Richtek

RT9167/A Low-Noise, Fixed Output Voltage,300mA/500mA LDO Regulator General Description Features zz z zz Stable with Low-ESR Output Capacitor The RT9167/A is a 300mA/500mA low dropout and low zz z zz Low Dropout Voltage (350mV @ 300mA) noise micropower regulator suitable for portable zz z zz Low Operation Current 80A Typical applications. The output voltages range from 1.5V to 5V zz z zz Shutdown Function in 100mV increments and 2% accuracy. The RT9167/A is zz z zz Low Noise Output designed for use with very low ESR capacitors. The output zz z zz Low Temperature Coefficient remains stable even with 1F ceramic output capacitor. zz z zz Current and Thermal Limiting The RT9167/A uses an internal P-MOSFET as the pass zz z zz Custom Voltage Available device, which does not cause extra GND current in heavy zz z zz SOT-23-5 and SOP-8 Packages load and dropout conditions. The shutdown mode of nearly zz z zz RoHS Compliant and 100% Lead (Pb)-Free zero operation current makes the IC suitable for battery- powered devices. Other features include a reference Applications bypass pin to improve low noise performance, current z Cellular Telephones limiting, and over temperature protection. z Laptop, Notebook, and Palmtop Computers z Battery-powered Equipment Ordering Information z Hand-held Equipment RT9167/A- Package Type Marking Information B : SOT-23-5 BR : SOT-23-5 (R-Type) For marking information, contact our sales representative S : SOP-8 directly or through a Richtek distributor located in your Lead Plating System area. P : Pb Free G : Green (Halogen Free and Pb Free) Pin Configurations Output Voltage 15 : 1.5V (TOP VIEW) 16 : 1.6V : VOUT BP BP EN 49 : 4.9V 50 : 5.0V 5 4 5 4 2H : 2.85V 23 23 500mA Output Current VIN GND EN VOUT GND VIN 300mA Output Current Note : SOT-23-5 SOT-23-5 (R-Type) Richtek products are : ` RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. 8 EN GND ` Suitable for use in SnPb or Pb-free soldering processes. 2 7 VIN GND 3 VOUT 6 GND BP 4 5 GND SOP-8 DS9167/A-29 April 2011 www.richtek.com 1+ + - RT9167/A Typical Application Circuit RT9167/A V IN OUT V IN OUT C C IN OUT 1F 1F GND Chip Enable EN BP C BP 10nF Functional Pin Description Pin Name Pin Function VIN Power Input Voltage GND Ground EN Chip Enable (Active High) BP Reference Noise Bypass VOUT Output Voltage Function Block Diagram Shutdown VIN EN and Logic Control VREF BP + MOS Driver Error VOUT Amplifier Current-Limit and R1 Thermal Protection R2 GND www.richtek.com DS9167/A-29 April 2011 2