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LP3303 Datasheet(PDF) 1 Page - Lowpower Semiconductor inc |
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LP3303 Datasheet(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 7 page  Preliminary Datasheet LP3303 LP3303 –03 Ver. 1.3 Datasheet Feb.-2009 Page 1 of 7 No Schttoy, High Performance, Constant Current Switching Regulator For 9PCS White LED General Description The LP3303 is a 1.0MHz PWM boost switching regulator designed for constant- current white LED driver applications. The LP3303 can drive a string of up to 8 white LEDs from a 3.6V in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3303 implements a constant frequency 1.0MHz PWM control scheme. The high frequency PWM operation also saves board space by reducing external component sizes. To improve efficiency, the feedback voltage is set to 200mV, which reduces the power dissipation in the current setting resistor. Highly integration and internal compensation network minimizes as 3 external component counts. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. Ordering Information LP3303 F: Pb-Free B6:SOT23-6 Pin Configurations Features High Efficiency: 86% 1.2MHzFixed-Frequency PWM Operation Maximum Output Voltage up to 28V Operating Range : 2.7V to 16V Shutdown Supply Current:<1uA Available in SOT23-6 Package Built-in Over Voltage Protection Minimize the External Component RoHS Compliant and 100% Lead (Pb)-Free Applications WLED Blacklight driver OLED Blacklight driver PDA DSC Camera Flash WLED driver Typical Application Circuit 22uH LP3303 4 3 6 5 CTRL FB VIN OUT Rset 1uF VIN 1uF 10R Marking information Please view website. |
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