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RT8293A Datasheet(PDF) 4 Page - Richtek Technology Corporation |
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RT8293A Datasheet(HTML) 4 Page - Richtek Technology Corporation |
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4 / 15 page  RT8293A 4 DS8293A-03 March 2011 www.richtek.com Electrical Characteristics (VIN = 12V, TA = 25 °C, unless otherwise specified) Absolute Maximum Ratings (Note 1) l Supply Voltage, VIN ---------------------------------------------------------------------------------------- −0.3V to 25V l Input Voltage, SW ------------------------------------------------------------------------------------------ −0.3V to (VIN + 0.3V) l VBOOT − VSW ------------------------------------------------------------------------------------------------- −0.3V to 6V l Other Pins Voltage ------------------------------------------------------------------------------------------ −0.3V to 6V l Power Dissipation, PD @ TA = 25 °C SOP-8 (Exposed Pad) ------------------------------------------------------------------------------------- 1.333W l Package Thermal Resistance (Note 2) SOP-8 (Exposed Pad), θJA-------------------------------------------------------------------------------- 75°C/W SOP-8 (Εxposed Pad), θJC ------------------------------------------------------------------------------- 15°C/W l Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------- 260 °C l Junction Temperature -------------------------------------------------------------------------------------- 150 °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 Supply Voltage, VIN ---------------------------------------------------------------------------------------- 4.5V to 23V l Junction Temperature Range ----------------------------------------------------------------------------- −40°C to 125°C l Ambient Temperature Range ----------------------------------------------------------------------------- −40°C to 85°C Parameter Symbol Test Conditions Min Typ Max Unit Shutdown Supply Current VEN = 0V -- 0.5 3 µA Supply Current VEN = 3 V, VFB = 0.9V -- 0.8 1.2 mA Feedback Voltage VFB 4.5V ≤ VIN ≤ 23V 0.788 0.8 0.812 V Error Amplifier Transconductance GEA ∆IC = ± 10µA -- 940 -- µA/V High Side Switch On-Resistance RDS(ON)1 -- 85 -- m Ω Low Side Switch On-Resistance RDS(ON)2 -- 85 -- m Ω High Side Switch Leakage Current VEN = 0V, VSW = 0V -- 0 10 µA Upper Switch Current Limit Min. Duty Cycle, VBOOT− VSW = 4.8V -- 5.1 -- A Lower Switch Current Limit From Drain to Source -- 1.5 -- A COMP to Current Sense Transconductance GCS -- 5.4 -- A/V Oscillation Frequency fOSC1 300 340 380 kHz Short Circuit Oscillation Frequency fOSC2 VFB = 0V -- 100 -- kHz Maximum Duty Cycle DMAX VFB = 0.7V -- 93 -- % Minimum On Time tON -- 100 -- ns To be continued |
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