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发布者:来自网络 发布时间:2014/7/23 阅读:2257次    关键字: DC-DC
EUP3291-1.5A,2.25MHz Synchronous Step-Down DC/DC


EUP3291-1.5A,2.25MHz Synchronous Step-Down DC/DC Regulator DataSheet 

DESCRIPTION

      The EUP3291 is synchronous step-down DC-DC converters optimized for battery powered portable applications. The 2.7V to 5.5V input voltage range makes EUP3291 ideal for powering portable equipment that runs from 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3V or 5V voltage rail.
      The EUP3291 operates at 2.25MHz fixed switching frequency allowing the use of small inductors and capacitors to achieve a small solution size. The internal synchronous switch increases efficiency and eliminates the need for an external schottky diode. The EUP3291 has internal soft start and avoids inrush current during startup.
      The EUP3291 has a user selectable mode of forced PWM and PFM/PWM mode. The forced PWM mode operation provides the lowest ripple noise and the PFM mode operation provides high efficiency at light loads. The EUP3291 is available in TDFN-6 package and it provides up to 1.5A output current.

FEATURES

• High Efficiency Up to 95%
• 2.25MHz Constant Switching Frequency
• 1.5A Available Load Current
• 30µA Typical Quiescent Current
• 2.7V to 5.5V Input Voltage Range
• Adjustable Output Voltage as Low as 0.6V
• No Schottky Diode Required
• Short Circuit and Thermal Protection
• Internal Soft Start Function
• Available in TDFN-6 Package
• RoHS Compliant and 100% Lead(Pb)-Free
   Halogen-Free

APPLICATIONS

• SSD Module
• Smart Phones
• Tablet PC
• Portable Media Players
• μC/μP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and
   Switchers

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