5 A, 500KHz Synchronous Boost Converter with Output Disconnect CXSU63041 devices provide a power supply solution for products powered by either a one-cell Li-Ion or Li-polymer

   产品概述 返回TOPPXS嘉泰姆

      The CXSU63041 devices provide a power supply solution for products powered by either a one-cell Li-Ion or Li-polymer, or a two to three-cell alkaline, NiCd or NiMH battery. The converter generates a stable output voltage that is either adjusted by an external resistor divider. It provides high efficient power conversion and is capable of delivering output currents up to 1.5A at 5V at a supply voltage down to 2V. The implemented boost converter is based on a fixed switching frequency (500kHz typical), current-mode controller using a synchronous rectifier to obtain maximum efficiency. Boost switch and rectifier switch are connected internally to provide the lowest leakage inductance and best EMI behavior possible. The current-mode control scheme provides fast transient response and good output voltage accuracy. At light load, the converter will automatically enter into Pulse Frequency Modulation (PFM) operation to reduce the dominant switching losses. During PFM operation, the IC consumes very low quiescent current and maintains high efficiency over a wide load current range. The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. The device allows use of small inductors and output capacitors for USB devices.

   产品特点 返回TOPPXS嘉泰姆

 97% Efficiency at VOUT=5V from 3.3V Input PXS嘉泰姆

 Device Quiescent Current: 37μA (Typ) PXS嘉泰姆

 Guaranteed 2.5A Output Current at VOUT=5V from 3.3V Input PXS嘉泰姆

 500kHz PWM Switching Frequency PXS嘉泰姆

 Synchronous and Embedded Power MOSFETs, No Schottky Diode Required PXS嘉泰姆

 Low RDS(ON) (main switch/synchronous switch) at 5.0V output:   20/40mohm PXS嘉泰姆

 Input Voltage Range: 1.8V to 5.25V PXS嘉泰姆

 Adjustable Output Voltage Range: from 2.5V to 5.5V PXS嘉泰姆

 Pulse Frequency Modulation Operation for Improved Efficiency at Low Output Power PXS嘉泰姆

 Current Mode Operation with Internal Compensation for Excellent Line    and Load Transient Response PXS嘉泰姆

 Logic Controlled Shutdown(<1μA) PXS嘉泰姆

 Load Disconnect During Shutdown PXS嘉泰姆

 Automatic output discharge at shutdown: PXS嘉泰姆

    CXSU63041A: Auto output discharge function PXS嘉泰姆

   CXSU63041B: No output discharge function PXS嘉泰姆

 Low Battery Comparator PXS嘉泰姆

 Internal Soft-Start to Limit Inrush Current PXS嘉泰姆

 Over Current Protection PXS嘉泰姆

 Input Under Voltage Lockout PXS嘉泰姆

 Output Over Voltage Protection PXS嘉泰姆

 Over-Temperature Protection PXS嘉泰姆

 Available in 2.1mm x 2.1mm QFN10 PackagePXS嘉泰姆

   应用范围 返回TOPPXS嘉泰姆

 All Single Cell Li or Dual Cell Battery Operated Products as Tablet PC, Smartbook and Other Portable Equipment PXS嘉泰姆

 Products including portable HDMI and USB-OTG PXS嘉泰姆

 USB Hosts Without Native 5V Supplies PXS嘉泰姆

 USB Charging Port (5V) PXS嘉泰姆

 Power Bank, Battery Backup Units PXS嘉泰姆

 Wireless Peripherals PXS嘉泰姆

 Portable Audio Players PXS嘉泰姆

 Personal Medical Devices PXS嘉泰姆

 Industrial Metering Equipments PXS嘉泰姆

 DC/DC Micro ModulesPXS嘉泰姆

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