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RT8025 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8025 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 13 page  RT8025 1 DS8025-02 March 2011 www.richtek.com Features 2.5V to 5.5V Input Range Adjustable Output From 0.5V to VIN 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V and 3.3V Fixed/ Adjustable Output Voltage 400mA 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 Halogen Free Applications Cellular Telephones Personal Information Appliances Wireless and DSL Modems MP3 Players Portable Instruments 1.25MHz, 400mA, High Efficiency PWM Step-Down DC/DC Converter General Description The RT8025 is a high-efficiency pulse-width-modulated (PWM) step-down DC/DC converter. Capable of delivering 400mA output current over a wide input voltage range from 2.5 to 5.5V, the RT8025 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 RT8025 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 RT8025 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. RT8025 enter shutdown mode and consumes less than 0.1 μAwhen ENpin 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. Ordering Information Pin Configurations (TOP VIEW) SOT-23-5/TSOT-23-5 VIN GND EN LX FB/VOUT 4 23 5 Note : Richtek 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. RT8025(- ) Package Type B : SOT-23-5 J5 : TSOT-23-5 Lead Plating System G : Green (Halogen Free and Pb Free) Output Voltage Default : Adjustable 10 : 1.0V 12 : 1.2V 13 : 1.3V 15 : 1.5V 18 : 1.8V 25 : 2.5V 33 : 3.3V Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. |
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