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UP9305WSU8 Datasheet(PDF) 1 Page - uPI Group Inc. |
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UP9305WSU8 Datasheet(HTML) 1 Page - uPI Group Inc. |
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1 / 16 page  uP9305 1 uP9305-DS-C3000, Aug. 2015 www.upi-semi.com Conceptual 5V/12V Synchronous-Rectified Buck Controller The uP9305 is a compact synchronous-rectified buck controller specifically designed to operate from 5V or 12V supply voltage and to deliver high quality output voltage as low as 0.6V for uP9305S/W (linear OCP). The uP9305 adopts constant frequency, voltage mode control scheme, featuring easy-to-use, low external component count, and fast transient response. Fixed 300kHz operation provides an optimal level of integration to reduce size and cost of the power supply. This controller integrates internal MOSFET drivers that support 12V+12V bootstrapped voltage for high efficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count. Other features include internal soft start, over/under voltage protection, over current protection and shutdown function. With aforementioned functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solutions. This part is available in PSOP-8L package. ! ! ! ! ! Operates from 5V or 12V Supply Voltage " " " " " 3.3V to 12V V IN Input Range " " " " " V REF with 1.0% Accuracy: uP9305S/W: 0.6V V REF uP9305T/Q: 0.8V V REF ! ! ! ! ! Stand Alone Mode Operation ! ! ! ! ! Simple Single-Loop Control Design " " " " " Voltage-Mode PWM Control " " " " " Fast Transient Response " " " " " Fixed 300kHz Switching Frequency ! ! ! ! ! High-Bandwidth Error Amplifier " " " " " 0% to 90% Duty Cycle ! ! ! ! ! Lossless, Adjuatable Over Current Protection " " " " " Uses Lower MOSFET R DS(ON) " " " " " uP9305S/W: Linear OCP " " " " " uP9305T/Q: Fixed OCP ! ! ! ! ! Internal Soft Start ! ! ! ! ! Integrated Boot Diode ! ! ! ! ! PSOP-8L Package ! ! ! ! ! RoHS Compliant and Halogen Free ! ! ! ! ! Power Supplies for Microprocessors or Subsystem Power Supplies ! ! ! ! ! Cable Modems, Set Top Boxes, and DSL Modems ! ! ! ! ! Industrial Power Supplies; General Purpose Supplies ! ! ! ! ! 5V or 12V Input DC-DC Regulators ! ! ! ! ! Low-Voltage Distributed Power Supplies General Description Applications Features LG VCC 4 3 2 1 OCS BOOT FB COMP/EN 5 6 7 8 UG PH 9 GND PSOP-8L (uP9305S/W) Pin Configuration LG VCC 4 3 2 1 GND BOOT FB COMP/EN 5 6 7 8 UG PH 9 GND PSOP-8L (uP9305Q/T) |
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