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RT8265 Datasheet(PDF) 4 Page - Richtek Technology Corporation |
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RT8265 Datasheet(HTML) 4 Page - Richtek Technology Corporation |
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4 / 13 page  RT8265 4 DS8265-02 March 2011 www.richtek.com Electrical Characteristics Parameter Symbol Test Conditions Min Typ Max Unit Feedback Reference Voltage VFB 4.75V ≤ VIN ≤ 24V 0.784 0.8 0.816 V High Side Switch-On Resistance RDS(ON)1 -- 0.11 -- Ω Low Side Switch-On Resistance RDS(ON)2 -- 10 -- Ω Switch Leakage VEN = 0V, VSW = 0V -- -- 10 μA Current Limit ILIM 3.8 5 -- A Oscillator Frequency fSW -- 1 -- MHz Short Circuit Oscillation Frequency -- 100 -- kHz Maximum Duty Cycle -- 85 -- % Minimum On-Time tON -- 100 -- ns Under Voltage Lockout Threshold Rising 3.8 4.2 4.65 V Under Voltage Lockout Threshold Hysteresis -- 200 -- mV En input Low Voltage -- -- 0.4 V En input High Voltage 1.4 -- -- V Enable Pull Up Current -- 1 3 μA Shutdown Current ISHDN VEN = 0V -- 25 -- μA Quiescent Current IQ VEN = 2V, VFB = 1V -- 0.8 1 mA Soft-Start Period CSS = 0.1μF -- 10 -- ms Thermal Shutdown TSD -- 150 -- °C (VIN = 12V, TA = 25° C unless otherwise specified) Absolute Maximum Ratings (Note 1) Supply Voltage, VIN ----------------------------------------------------------------------------------------- −0.3V to 26V Input Voltage, SW ------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V) BOOT Voltage ------------------------------------------------------------------------------------------------ (VSW − 0.3V) to (VSW + 6V) All Other Voltage --------------------------------------------------------------------------------------------- −0.3V to 6V Power Dissipation, PD @ TA = 25 °C SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------- 1.333W Package Thermal Resistance (Note 2) SOP-8 (Exposed Pad), θJA -------------------------------------------------------------------------------- 75°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 Recommended Operating Conditions (Note 4) Supply Voltage, VIN ----------------------------------------------------------------------------------------- 4.75V to 24V Enable Voltage, VEN ----------------------------------------------------------------------------------------- 0V to 5.5V Junction Temperature Range ------------------------------------------------------------------------------ −40°C to 125°C Ambient Temperature Range ------------------------------------------------------------------------------ −40°C to 85°C |
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