ME2188A33M3G

ME2188 High Efficiency ,synchronous PFM step-up DC-DC converter General Description Features ME2188 Series is a PFM Step-up DC/DC converter IC with low supply current by CMOS  High efficiency：95%  Maximum frequency：350KHz process. High frequency noise that occurs during  Low Quiescent Current：13μA switching is reduced by using advanced circuit  Input Voltage: 0.9V~5.0V designed, output voltage is programmable in 0.1V  Output Voltage Range:1.8V to 5.0V steps between 1.8V~5.0V and maximum frequency  High Accuracy:± 2% is 350KHz(TYP.). A low ripple, high efficiency step-up  Low ripple and Low noise DC/DC converter can be constructed of ME2188Xxx  Package: with only two external components. ME2188Xxx is SOT23-3, SOT23-5，SOT23，SOT89-3， suitable for use with battery-powered instruments TO-92 with low noise and low supply current. Selection Guide 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 V03 www.microne.com.cn Page 1 of 12 ME2188 Pin Configuration Pin Assignment SWITCHING TYPE POSTFIX PACKAGE CE FUNCTION FEATURES Build in Transistor No Lx Build in Transistor Yes LX+CE TRANSISTOR ME2188Axx ME2188Cxx X SOT23 M3 SOT23-3 P SOT89-3 T TO92 M5 SOT23-5 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 2 VOUT 3 NC NC 4 GND Ground 5 LX Switch V03 Chip enable Output voltage monitor, IC internal power supply www.microne.com.cn Page 2 of 12 ME2188 Absolute Maximum Ratings Parameter Symbol Ratings Units Supply Voltage VMAX 8 V LX pin current ILXmax 1000 mA SOT23 PD 300 mW SOT89 PD 500 mW TO92 PD 500 mW Operating Temperature Range TOPR -20～＋85 ℃ Storage Temperature Range TSTG -40~125 ℃ ESD VESD 2000 V Continuous Total Power Dissipation Block Diagram V03 www.microne.com.cn Page 3 of 12 ME2188 Electrical Characteristics TA=250C, Vin=VOUT×0.6V, L=22μH，CIN=10μF，COUT=100μF, unless otherwise noted. ME2188Axx/Cxx Symbol Parameter VOUT Test Conditions MIN TYP MAX UNIT Output Voltage VOUT×0.98 VOUT VOUT×1.02 V VIN Supply Voltage 0.9 - 5 V VSTART Start voltage Iload=1mA，Vin：0→2V - 0.85 1.1 V Vhold Hold voltage Iload=1mA，Vin：2→0V 0.5 - - V FOSC oscillation frequency - 350 - KHz η Efficiency - 90 95 % Ilimit Current limit 800 1000 1200 mA IIN Quiescent Current - 13 15 μA Note：1、Inductor：22μH（r