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RT9263 Datasheet(PDF) 5 Page - Richtek Technology Corporation |
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RT9263 Datasheet(HTML) 5 Page - Richtek Technology Corporation |
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5 / 8 page  RT9263 Preliminary 5 DS9263-09 March 2007 www.richtek.com Absolute Maximum Ratings Supply Voltage ----------------------------------------------------------------------------------------------------- −0.3V to 7V LX Pin Switch Voltage -------------------------------------------------------------------------------------------- −0.3V to (VDD + 0.8V) Other I/O Pin Voltages ------------------------------------------------------------------------------------------- −0.3V to (VDD + 0.3V) LX Pin Switch Current -------------------------------------------------------------------------------------------- 2.5A EXT Pin Driver Current -------------------------------------------------------------------------------------------- 30mA Power Dissipation, PD @ TA = 25 °C SOT89-5 ------------------------------------------------------------------------------------------------------------- 0.5W Package Thermal Resistance SOT89-5, θJA ---------------------------------------------------------------------------------------------------------------------------------------------------- 300°C/W Operating Junction Temperature ------------------------------------------------------------------------------- 150 °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 Start-up to IDD1 > 250μA 0.8 -- 6.5 * V No Load Current I (VIN) INO LOAD VIN = 1.5V, VOUT = 3.3V -- 47 -- μA Switch-off Current I (VDD) ISWITCH OFF VIN = 6V -- 17 -- μA Shutdown Current I (VIN) IOFF EN Pin = 0V, VIN = 4.5V -- 0.1 1 μA Feedback Reference Voltage VREF Close Loop, VDD = 3.3V 1.225 1.25 1.275 V Switching Rate FS VDD = 3.3V -- 550 -- kHz Maximum Duty DMAX VDD = 3.3V -- 92 -- % LX ON Resistance VDD = 3.3V -- 0.25 -- Ω Current Limit Setting ILIM VDD = 3.3V -- 2 -- A EXT ON Resistance to VDD VDD = 3.3V -- 40 -- Ω EXT ON Resistance to GND VDD = 3.3V -- 30 -- Ω Line Regulation ΔVLINE VIN = 1.5 ~ 2.5V, IL = 1mA -- 10 -- mV/V Load Regulation ΔVLOAD VIN = 2.5V, IL = 1 ~ 100mA -- 0.25 -- mV/mA EN Pin Trip Level VDD = 3.3V 0.2 0.8 1.4 V Temperature Stability for FB, LFB, LBI TS Guaranteed by Design -- 50 -- ppm/ °C Thermal Shutdown TSD Guaranteed by Design -- 165 -- °C Thermal Shutdown Hysterises ΔTSD Guaranteed by Design -- 10 -- °C * Note: The EN pin shall be tied to VDD pin and inhibit to act the ON/OFF state whenever the VDD pin voltage may reach to 5.5V or above. |
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