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RT8509 Datasheet(PDF) 3 Page - Richtek Technology Corporation |
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RT8509 Datasheet(HTML) 3 Page - Richtek Technology Corporation |
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3 / 9 page  RT8509 3 DS8509-01 March 2012 www.richtek.com © Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Electrical Characteristics Recommended Operating Conditions (Note 4) Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C Absolute Maximum Ratings (Note 1) LX, VSUP to GND --------------------------------------------------------------------------------------------------------- −0.3V to 28V VIN, EN to GND ------------------------------------------------------------------------------------------------------------ −0.3V to 16.5V Other Pins to GND -------------------------------------------------------------------------------------------------------- −0.3V to 6.5V Power Dissipation, PD @ TA = 25 °C WDFN-10L 3x3 ------------------------------------------------------------------------------------------------------------- 1.429W Package Thermal Resistance (Note 2) WDFN-10L 3x3, θJA ------------------------------------------------------------------------------------------------------- 70°C/W WDFN-10L 3x3, θJC ------------------------------------------------------------------------------------------------------- 8.2°C/W Junction Temperature ----------------------------------------------------------------------------------------------------- 150 °C Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C Lead Temperature (Soldering, 10sec.) -------------------------------------------------------------------------------- 260 °C ESD Susceptibility (Note 3) HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V (VIN = 3.3V, VOUT = 10V, TA =25 °C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Current Input Voltage Range VIN 2.8 -- 14 V Output Voltage Range VOUT -- -- 24 V Under Voltage Lockout Threshold VUVLO VIN Rising -- 2.5 3 V UVLO Hysteresis ΔVUVLO -- 200 -- mV VFB = 1.3V, LX Not Switching -- 1 -- VIN Quiescent Current IQ VFB = 1V, LX Switching -- 5 -- mA Thermal Shutdown Threshold TSD Temperature Rising -- 155 -- °C Thermal Shutdown Hysteresis ΔTSD -- 10 -- °C VSUP Over Voltage Threshold VSUP Rising -- 26 -- V Oscillator Oscillator Frequency fOSC 1000 1200 1500 kHz Maximum Duty Cycle DMAX -- 90 -- % Error Amplifier FB Regulation Voltage VREF -- 1.25 -- V FB Input Bias Current IFB -- -- 100 nA FB Line Regulation -- 0.05 0.2 %/V |
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