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RT9971 Datasheet(PDF) 8 Page - Richtek Technology Corporation |
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RT9971 Datasheet(HTML) 8 Page - Richtek Technology Corporation |
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8 / 22 page  8 DS9971-01 April 2011 www.richtek.com RT9971 Electrical Characteristics (VDDM = 3.3V, TA = 25 °C, unless otherwise specified) Absolute Maximum Ratings (Note 1) l Supply Voltage, VDDM ------------------------------------------------------------------------------ −0.3V to 7V l Power Switch : LX1, LX2, LX3, LX4 ---------------------------------------------------------------------------------- −0.3V to 6.5V LX5, LX7, SW5I, SW5O, VOUT7 ---------------------------------------------------------------- −0.3V to 21V LX6 ----------------------------------------------------------------------------------------------------- (PVDD6 − 14V) to (PVDD6 + 0.3V) l The Other Pins -------------------------------------------------------------------------------------- −0.3V to 6.5V l Power Dissipation, PD @ TA = 25 °C WQFN 40L 5x5 -------------------------------------------------------------------------------------- 2.778W l Package Thermal Resistance (Note 2) WQFN 40L 5x5, θJA--------------------------------------------------------------------------------- 36°C/W WQFN 40L 5x5, θJC --------------------------------------------------------------------------------7°C/W l Junction Temperature ------------------------------------------------------------------------------ 150 °C l Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------- 260 °C l Storage Temperature Range ---------------------------------------------------------------------- −65°C to 150°C l ESD Susceptibility (Note 3) HBM (Human Body Mode) ------------------------------------------------------------------------ 2kV MM (Machine Mode) ------------------------------------------------------------------------------- 200V Recommended Operating Conditions (Note 4) l Junction Temperature Range --------------------------------------------------------------------- −40°C to 125°C l Ambient Temperature Range --------------------------------------------------------------------- −40°C to 85°C Parameter Symbol Test Condition Min Typ Max Unit Supply Voltage VDDM Operating Voltage VDDM 2.7 -- 5.5 V VDDM Startup Voltage VST 1.5 -- -- V VDDM Over Voltage Protection 6 6.25 6.5 V Supply Current Shutdown Supply Current into VDDM IOFF All EN = 0, CN = 3.3V -- 5 10 µA CH1 (Syn-Step-Up) : Supply Current into VDDM IQ1 Non Switching, EN134 = 3.3V -- -- 800 µA CH2 (Syn-Step-Up or Syn-Step-Down) : Supply Current into VDDM IQ2 Non Switching, EN2 = 3.3V -- -- 800 µA CH3 (Syn-Step-Down) : Supply Current into VDDM IQ3 Non Switching, EN134 = 3.3V -- -- 800 µA CH4 (Syn-Step-Down) : Supply Current into VDDM IQ4 Non Switching, EN134 = 3.3V -- -- 800 µA CH5 (Asyn-Step-Up) : Supply Current into VDDM IQ5 Non Switching, EN5 = 3.3V -- -- 800 µA CH6 (Inverting) + Charge pump : Supply Current into VDDM IQ6 Non Switching, EN6 = 3.3V PVDD6 = 3.3V -- -- 800 µA CH7 (WLED): Supply Current into VDDM IQ7 Non Switching, EN7 = 3.3V -- -- 800 µA To be continued |
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