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RT9266B Datasheet(PDF) 4 Page - Richtek Technology Corporation |
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RT9266B Datasheet(HTML) 4 Page - Richtek Technology Corporation |
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4 / 13 page  RT9266B 4 DS9266B-09 March 2007 www.richtek.com Absolute Maximum Ratings Supply Voltage ----------------------------------------------------------------------------------------------------- −0.3V to 7V LX Pin Switch Voltage -------------------------------------------------------------------------------------------- −0.3V to 6.5V Other I/O Pin Voltages ------------------------------------------------------------------------------------------- −0.3V to (VDD + 0.3V) LX Pin Switch Current -------------------------------------------------------------------------------------------- 2.5A EXT Pin Driver Current -------------------------------------------------------------------------------------------- 200mA Package Thermal Resistance SOT-23-6, θJC ------------------------------------------------------------------------------------------------------ 145°C/W Operating Junction Temperature ------------------------------------------------------------------------------- 125 °C Storage Temperature Range ------------------------------------------------------------------------------------ −65°C to +150°C Electrical Characteristics (VIN = 1.5V, VDD set to 3.3V, Load Current = 0, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Start-UP Voltage VST IL = 1mA -- 0.98 1.05 V Operating VDD Range VDD VDD pin voltage 2 -- 6.5 V No Load Current I (VIN) INO LOAD VIN = 1.5V, VOUT = 3.3V -- 150 -- μA Switch-off Current I (VDD) ISWITCH OFF VIN = 6V -- 25 -- μA Shutdown Current I (VIN) IOFF EN Pin = 0V, VIN = 4.5V -- 0.01 1 μA Feedback Reference Voltage VREF Close Loop, VDD = 3.3V 1.225 1.25 1.275 V Switching Frequency FS VDD = 3.3V -- 550 -- kHz Maximum Duty DMAX VDD = 3.3V -- 95 -- % LX ON Resistance VDD = 3.3V -- 0.35 -- Ω Current Limit Setting ILIMIT VDD = 3.3V -- 0.5 -- A Current Limit Delay Time VDD = 3.3V -- 300 -- ns EXT ON Resistance to VDD VDD = 3.3V -- 5 -- Ω EXT ON Resistance to GND VDD = 3.3V -- 5 -- Ω Line Regulation (refer to VFB) ΔVLINE VIN = 1.5 ~ 2.5V, IL = 50mA -- 12 -- mV/V Load Regulation (refer to VFB) ΔVLOAD VIN = 2.5V, IL = 1 ~ 100mA -- 0.25 -- mV/mA EN Pin Trip Level VDD = 3.3V 0.4 0.8 1.2 V Temperature Stability for Vout TS -- 50 -- ppm/°C Thermal Shutdown TSD -- 165 -- °C Thermal Shutdown Hysterises ΔTSD -- 10 -- °C |
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