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RT8009-10GJ5 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8009-10GJ5 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 13 page  RT8009 1 DS8009-03 March 2007 www.richtek.com Features +2.5V to +5.5V Input Range Adjustable Output From 0.5V to VIN 1.0V, 1.2V, 1.5V, 1.8V, 2.5V and 3.3V Fixed/ Adjustable Output Voltage 600mA Output Current 95% Efficiency No Schottky Diode Required 1.25MHz Fixed-Frequency PWM Operation Small SOT-23-5 and TSOT-23-5 Package RoHS Compliant and 100% Lead (Pb)-Free Applications Cellular Telephones Personal Information Appliances Wireless and DSL Modems MP3 Players Portable Instruments 1.25MHz, 600mA, High Efficiency PWM Step-Down DC/DC Converter General Description The RT8009 is a high-efficiency pulse-width-modulated (PWM) step-down DC-DC converter. Capable of delivering 600mA output current over a wide input voltage range from 2.5 to 5.5V, the RT8009 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and handy-terminals. Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application. The RT8009 automatically turns off the synchronous rectifier while the inductor current is low and enters discontinuous PWM mode. This can increase efficiency at light load condition. The RT8009 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. RT8009 enter shutdown mode and consumes less than 0.1uA when EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation frequency of 1.25MHz. This along with small SOT-23-5 and TSOT-23-5 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection. Note : RichTek Pb-free and Green products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 100% matte tin (Sn) plating. Ordering Information Pin Configurations (TOP VIEW) SOT-23-5/TSOT-23-5 VIN GND EN LX 2 3 5 4 1 FB/VOUT RT8009(- ) Package Type B : SOT-23-5 J5 : TSOT-23-5 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) Output Voltage Default : Adjustable 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 25 : 2.5V 33 : 3.3V |
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