RT9006A

RT9006A/B Dual LDO Regulator with Reset Function General Description The RT9006A/B is an efficient, precise dual-channel CMOS LDO regulator optimized for ultra-low-quiescent applications. Regulators output1 and output2 are capable of sourcing 300mA and 500mA of output current. The RT9006’ s performance is optimized for CD/DVD-ROM and CD/RW a supply applications. The RT9006A/B regulators are stable with output capacitors as low as 1μF, including current limit, thermal shutdown protection, fast transient response, low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. The RT9006A/B contains a reset circuit to detect VOUT2 voltage. The RT9006A/B regulators are available in used SOP-8 (Exposed Pad) surface mount package. Features Low Quiescent Current (Typically 70μA) Wide Operating Voltage Ranges : 2.8V to 5.5V for RT9006A Wide Operating Voltage Ranges : 2.5V to 5.5V for RT9006B Ultra-Fast Transient Response Tight Load and Line Regulation Current Limiting Protection Thermal Shutdown Protection Only low-ESR Ceramic Capacitors Required for Stability RoHS Compliant and 100% Lead (Pb)-Free Applications CD/DVD-ROM, CD/RW Wireless LAN Card/Keyboard/Mouse Battery-Powered Equipment XDSL Router Ordering Information RT9006A/B Package Type SP : SOP-8 (Exposed Pad-Option 2) Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) Operating Frequency Version A : VOUT1 = 1.8V, VOUT2 = 3.3V B : VOUT1 = 1.5V, VOUT2 = 3.3V Note : Richtek Pb-free and Green products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 100% matte tin (Sn) plating. Pin Configurations (TOP VIEW) VOUT1 VIN1 VIN2 VOUT2 2 3 4 8 GND 6 9 5 7 GND GND RST CT SOP-8 (Exposed Pad) Typical Application Circuit VIN1 5V VIN1 C1 1uF RRST VOUT1 C3 1uF VOUT1 RT9006A/B RST CT CCT VIN2 5V VIN2 VOUT2 GND C4 1uF VOUT2 C2 1uF DS9006A/B-05 September 2007 www.richtek.com 1 RT9006A/B Functional Pin Description Pin No. 1 2 3 4 5 6 7, 8 Pin Name Pin Function V OUT1 V IN1 V IN2 V OUT2 CT R ST GND Channel 1 Output Voltage Channel 1 Supply Voltage Channel 2 Supply Voltage Channel 2 Output Voltage RESET Delay Capacitor Detect VOUT 2 Output Voltage Common Ground The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. Exposed Pad (9) GND Function Block Diagram Shutdown and Logic Control VREF + Error Amplifier VIN1 MOS Driver VOUT1 Current-Limit and Thermal Protection VIN2 + CT Error Amplifier MOS Driver Current-Limit and Thermal Protection VOUT2 VREF RST + VD Comparator GND RESET Waveform VOUT2 3.3V 2.8V ΔVHYS Td RST www.richtek.com 2 DS9006A/B-05 September 2007 RT9006A/B Absolute Maximum Ratings (Note 1) Input Voltage, VIN1, VIN2 --------------------------------------------------------------------------------------------- 6V Power Dissipation, PD @ TA = 25°C SOP-8 (Exposed Pad) ----------------------------------------------------------------------------------------------- 1.33W Package Thermal Resistance (Note 4) SOP-8 (Exposed Pad), θJA ------------------------------------------------------------------------------------------ 75°C/W SOP-8 (Exposed Pad), θJC ----------------------------------------------------------------------------------------- 28°C/W Junction Temperature ------------------------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------------- –65°C to 150°C ESD Susceptibility (Note 2) HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V Recommended Operating Conditions (Note 3) Input Voltage, VIN1, VIN2 --------------------------------------------------------------------------------------------- 2.8V to 5.5V Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range ---------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VIN1 = VIN2 = 5V, C1 = C2 = 1μF, C3 = C4 = 1μF (Ceramic), TA = 25°C, unless otherwise specified) Parameter Regulator 1 Output Voltage Accuracy Output Voltage Temperature Coefficient Load Regulation Symbol Test Conditions Min Typ Max Units VOUT1 IOUT1 = 30mA (RT9006A) IOUT1 = 30mA (RT9006B) IOUT1 = 200mA (Note5) 1.773 1.478 --- 1.8 1.5 -5 1.827 1.523 80 30 V ppm/°C mV ΔVLOAD1 1mA < IOUT1