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BL8521 Datasheet(PDF) 3 Page - SHANGHAI BELLING CO., LTD. |
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BL8521 Datasheet(HTML) 3 Page - SHANGHAI BELLING CO., LTD. |
3 / 8 page REV2.0 Page3 BL8521 5.5V, 1.4MHz, 3A Synchronous Buck Converter ABSOLUTE MAXIMUM RATING Supply Input Voltage, VDD, PVDD -------------------------------------------------------------------------- 0.3V to 6V LX Pin Switch Voltage -------------------------------------------------------------------------- 0.3V to (PVDD + 0.3V) Other I/O Pin Voltages ---------------------------------------------------------------------------- 0.3V to (VDD + 0.3V) LX Pin Switch Current ---------------------------------------------------------------------------------------------------- 3.5A Power Dissipation, PD @ TA = 25 C ,DFN-10L 3x3 ----------------------------------------------------------- 900mW Package Thermal Resistance,DFN-10L3x3, θJA ------------------------------------------------------------- 110 C/W Junction Temperature --------------------------------------------------------------------------------------------------- 150 C Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------------- 260 C Storage Temperature Range ----------------------------------------------------------------------------- 65C to 150C ESD HBM (Human Body Mode) ----------------------------------------------------------------------------------------- 2kV RECOMMENDED OPERATING CONDITIONS Supply Input Voltage ----------------------------------------------------------------------------------------- 3.6 to 5.5V Output Voltage Range ----------------------------------------------------------------------------------------0.8V to Vin Junction Temperature Range ------------------------------------------------------------------------- 40C to 125C Ambient Temperature Range --------------------------------------------------------------------------- 40C to 85C ELECTRICAL CHARACTERISTICS (VDD=5V, TA=25C, unless otherwise specified) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT VDD_Max Maximum Input Voltage 5.5 V IIN Supply Current Vfb=0.9 500 1000 A In Shutdown 1 A LSON Low side NMOS Rdson 100 200 m HSON High side PMOS Rdson 100 220 m Vref Feedback Voltage 0.784 0.8 0.816 V Ifb Feedback Leakage current -5 0.1 5 A REGlin Line Regulation Vin=4V to 5.5V 0 0.1 0.3 %/V REGload Load Regulation Iout=1 to 3A 0 0.03 0.1 %/A Fsoc Switching Frequency RRT=180K 1.44 1.8 2.16 MHz RRT=330K 0.86 1.15 1.44 MHz Ilimit Peak Current Limit 3.2 4 A SHDN_V Shutdown Voltage Vin-0.7V Vin V UVLO_rise Power on minimum Vin voltage Increase Vin until IC work 3.42 3.6 3.78 V UVLO_fall Power off Vin under voltage lock out Decrease Vin until IC shut off 1.98 2.37 V |
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