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RT8055B Datasheet(PDF) 4 Page - Richtek Technology Corporation |
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RT8055B Datasheet(HTML) 4 Page - Richtek Technology Corporation |
4 / 13 page RT8055B 4 DS8055B-03 April 2011 www.richtek.com Absolute Maximum Ratings (Note 1) Supply Input Voltage, VDD, PVDD ---------------------------------------------------------------------------- −0.3V to 6.5V LX Pin Switch Voltage -------------------------------------------------------------------------------------------- −0.3V to (PVDD+ 0.3V) <30ns ---------------------------------------------------------------------------------------------------------------- −5V to 7.5V Other I/O Pin Voltages ------------------------------------------------------------------------------------------- −0.3V to 6.5V LX Pin Switch Current -------------------------------------------------------------------------------------------- 4A Power Dissipation, PD @ TA = 25 °C WDFN-10L 3x3 ----------------------------------------------------------------------------------------------------- 1.667W Package Thermal Resistance (Note 2) WDFN-10L 3x3, θJA ----------------------------------------------------------------------------------------------- 60°C/W WDFN-10L 3x3, θJC ----------------------------------------------------------------------------------------------- 7.8°C/W Junction Temperature --------------------------------------------------------------------------------------------- 150 °C Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------- 260 °C Storage Temperature Range ------------------------------------------------------------------------------------ −65°C to 150°C ESD Susceptibility (Note 3) HBM (Human Body Mode) -------------------------------------------------------------------------------------- 2kV MM (Machine Mode) ---------------------------------------------------------------------------------------------- 200V Electrical Characteristics (VDD = 3.3V, TA = 25 °C, unless otherwise specified) To be continued Recommended Operating Conditions (Note 4) Supply Input Voltage ---------------------------------------------------------------------------------------------- 2.6V to 5.5V Junction Temperature Range ------------------------------------------------------------------------------------ −40°C to 125°C Ambient Temperature Range ------------------------------------------------------------------------------------ −40°C to 85°C Parameter Symbol Test Conditions Min Typ Max Unit Input Voltage Range VDD 2.6 -- 5.5 V Feedback Reference Voltage VREF 0.784 0.8 0.816 V Feedback Leakage Current IFB VFB = 3.3V -- -- 0.1 μA Active, VFB = 0.7V, Not Switching -- 500 -- μA DC Bias Current Shutdown -- -- 1 μA Output Voltage Line Regulation ΔVLINE VIN = 2.6V to 5.5V -- 0.1 -- %/V Output Voltage Load Regulation ΔVLOAD VIN = 5V, VOUT = 3.3V, IOUT = 0A to 3A -- 0.4 -- % Error Amplifier Transconductance gm -- 400 -- μA/V Current Sense Transresistance RS -- 0.4 -- Ω RT Leakage Current SHDN/RT = VIN = 5.5V -- -- 1 μA ROSC = 180kΩ 1.44 1.8 2.16 MHz Switching Frequency Adjustable Switching Frequency Range 0.3 -- 2 MHz Switch On Resistance, High RDS(ON)_P ISW = 0.3A -- 100 160 m Ω Switch On Resistance, Low RDS(ON)_N ISW = 0.3A -- 100 170 m Ω |
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