ME2188效率高,同步PFM升压型DCDC变换器VIP免费

ME2188 V03 Page 1 of 12 High Efficiency ,synchronous PFM step-up DC-DC converter General Description Features Selection Guide ME2188 Series is a PFM Step-up DC/DC converter IC with low supply current by CMOS process. High frequency noise that occurs during switching is reduced by using advanced circuit designed, output voltage is programmable in 0.1V steps between 1.8V~5.0V and maximum frequency is 350KHz(TYP.). A low ripple, high efficiency step-up DC/DC converter can be constructed of ME2188Xxx with only two external components. ME2188Xxx is suitable for use with battery-powered instruments with low noise and low supply current. Typical Application  Power source for battery-powered equipment  Power source for Wireless mouse,toys, Cameras, VCRs, PDAs, MP3, and Led lighting etc Typical Application Circuit  High efficiency：95%  Maximum frequency：350KHz  Low Quiescent Current：13μA  Input Voltage: 0.9V~5.0V  Output Voltage Range:1.8V to 5.0V  High Accuracy:± 2%  Low ripple and Low noise  Package: SOT23-3, SOT23-5，SOT23，SOT89-3，TO-92 ME2188 V03 Page 2 of 12 Pin Configu ration Pin Assignment TYPE POSTFIX PACKAGE SWITCHING TRANSISTOR CE FUNCTION FEATURES ME2188Axx X SOT23 Build in Transistor No Lx M3 SOT23-3 P SOT89-3 T TO92 ME2188Cxx M5 SOT23-5 Build in Transistor Yes LX+CE ME2188AXX Pin Number Pin Name Description SOT89-3 SOT23-3 SOT23 TO-92 1 1 1 1 GND Ground 2 3 3 2 VOUT Voltage output 3 2 2 3 LX Switch pin ME2188CXX PIN Number Pin Name Description SOT23-5 1 CE Chip enable 2 VOUT Output voltage monitor, IC internal power supply 3 NC NC 4 GND Ground 5 LX Switch ME2188 V03 Page 3 of 12 Absolute Maximum Ratings Parameter Symbol Ratings Units Supply Voltage VMAX 8 V LX pin...