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EMK325BJ476MM Datasheet(PDF) 3 Page - Richtek Technology Corporation |
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EMK325BJ476MM Datasheet(HTML) 3 Page - Richtek Technology Corporation |
3 / 12 page RT8250 3 DS8250-05 March 2011 www.richtek.com Function Block Diagram VA + - + - + - UV Comparator Oscillator 340kHz/110kHz Foldback Control 0.5V Internal Regulator + - 2.5V Shutdown Comparator Current Sense Amplifier BOOT VIN GND SW FB EN COMP 3V 5k VA VCC Slope Comp Current Comparator SS 7µA VCC + - EA 0.925V S R Q Q + - 1.2V Lockout Comparator + 100m Ω 85m Ω Absolute Maximum Ratings (Note 1) Supply Voltage, VIN ------------------------------------------------------------------------------------------ −0.3V to 24V Switching Voltage, SW ------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V) <20ns ---------------------------------------------------------------------------------------------------------- −0.3V to (VIN + 3V) BOOT Voltage ------------------------------------------------------------------------------------------------- (VSW − 0.3V) to (VSW + 6V) The Other Pins ------------------------------------------------------------------------------------------------ −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 SOP-8 (Exposed Pad), θJC -------------------------------------------------------------------------------- 15°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 ------------------------------------------------------------------------------------------ 4.5V to 23V 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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