ME2101A50PG

ME2101 Series Ver 02 ME2101 Series Step-up DC-DC Converter ME2101 Series is a PWM 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 2.0~5.0V and maximum frequency is 100KHz(Typ.). A low ripple, high efficiency step-up DC/DC converter can be constructed of ME2101AxxX with only three external components. Also available is a CE(chip enable) function that reduce power dissipation During shut-down mode., and an independent Vdd pin function (separated power supply and voltage detect pins) for fly-back circuits.An inner soft-start circuit limits current surges from input power supply at start up and the reliability of the chip is improved. ME2101XxxX is suitable for use with battery-powered instruments with low noise and low supply current. 21 01 A xx • Small number of external components: only an inductor, a diode and a capacitor； • Low ripple and low noise； • Operating voltage range：0.9V~6.5V； • Output voltage range：2.0V~5.0V(step 0.1V)； • Output voltage accuracy：±2.5%； • Output Current：if Vin=3.0V and Vout=3.3V，then Iout=350mA； • Low start voltage：≤0.9V(at Iout=1mA)； • Maximum oscillator frequency： 100KHz(Typ.)； • High Efficiency：87%(Type)； • Slow-Start Time ：15mS(Type)； • PACKAGE：SOT-23，SOT-89. Applications Power source for battery-powered equipment； • Power source for wireless mouse, wireless keyboard, toys, cameras, camcorders, VCRs, PDAs, and hand-held communication equipment； • Power source for appliances which require higher cell voltage than that of batteries used in the appliances。 Selection Guide ME Features • X Package P–SOT89 M–SOT23 Feature Code 27–2.7V 30–3.0V 33–3.3 50–5.0V …... Version or Function Product Type Product Series Microne TYPE ME2101Axx ME2101Bxx ME2101Cxx ME2101Dxx POSTFIX PACKAGE M P M P M P M P SOT-23-3 SOT-89-3 SOT-23-3 SOT-89-3 SOT-23-5 SOT-89-5 SOT-23-5 SOT-89-5 Nanjing Micro One Electronic Inc. SWITCHING TRANSISTOR Build_in Transistor Extemal Transistor Build_in Transistor Extemal Transistor Tel: 86-25-84731186 CE FUNCTION FEATURES No Lx No Ext Yes Lx+CE Yes Ext+CE www. microne. com. cn 1(11) ME2101 Series Ver 02 Pin Configuration Pin Assignment ME2101Axx PIN Number SOT-23-3 SOT-89-3 1 1 3 2 2 3 PIN NAME Vss Vout Lx FUNCTION Ground Output voltage monitor, IC internal power supply Switch ME2101Bxx PIN Number SOT-23-3 SOT-89-3 1 1 3 2 2 3 ME2101Cxx PIN Number SOT-23-5 SOT-89-5 4 5 2 2 5 4 1 3 3 1 ME2101Dxx PIN Number SOT-23-5 SOT-89-5 4 5 2 2 5 4 1 3 3 1 Nanjing Micro One Electronic Inc. PIN NAME Vss Vout Ext PIN Ground Output voltage monitor, IC internal power supply External switch transistor drive NAME Vss Vout Lx CE NC PIN FUNCTION FUNCTION Ground Output voltage monitor, IC internal power supply Switch Chip enable NC NAME Vss Vout Ext CE NC FUNCTION Ground Output voltage monitor, IC internal power supply External switch transistor drive Chip enable NC Tel: 86-25-84731186 www. microne. com. cn 2(11) ME2101 Series Ver 02 Block Diagram Absolute Maximum Ratings PARAMETER VIN Input Voltage Lx Pin voltage EXT Pin voltage CE Pin voltage Lx Pin current EXT Pin current Vdd input voltage Continuous Total SOT-23 Power Dissipation SOT-89 Operating Ambient Temperature Storage Temperature Soldering temperature and time Nanjing Micro One Electronic Inc. SYMBAL VIN VLX VEXT VCE ILX IEXT Vdd RATINGS 6.5 6.5 -0.3~Vout+0.3 -0.3~Vout+0.3 600 ±30 6.5 UNITS V V V V mA mA V Pd 300 mW Pd 500 mW TOpr Tstg Tsolder -25~+85 -40~+125 260℃, 10s ℃ ℃ Tel: 86-25-84731186 www. microne. com. cn 3(11) ME2101 Series Ver 02 Electrical Characteristics ME2101A30 Vout=3.0V,Fosc=100kHz SYMB-OL PARAMETER VOUT Output Voltage VIN Vstart CONDITIONS Maximum Input Voltage Oscillation Start-up Voltage Vhold Oscillation Hold Voltage IDD1 Supply Current 1 MIN TYP MAX UNITS 2.925 3.000 3.075 V 6.5 V 0.9 V IOUT=1mA， VIN：0→2V IOUT=1mA， VIN：2→0V No external 0.8 component 0.24 V 30 µA Vout=Vout*0.95, IDD2 Supply Current 2 Vout=Vout+0.5V 11 µA Lx Switching Current Lx Leakage Current VLX=0.4V, Vout=Vout*0.95 250 mA IEXTH EXT”High” On Current Same as IDD1. IEXTL EXT”Low” On Current ILX ILXleak VCEH VCEL ICEH ICEL Fosc Maxdty EFFI Tss CE”High” Voltage CE”Low” Voltage CE”High” Current CE”low” Current Oscillation Frequency Duty Ratio Efficiency Slow-Start Time Vout=VLX=6V 0.5 VEXT=Vout-0.4V, Same as IDD1.. VEXT=0.4V, Vout=Vce=set Vout*0.95 Vout=Vce=set Vout*0.95 Vout=6.0V, Vce=6.0V Vout=6.0V, Vce=0.0V on(VLX“L”)side -6 mA 14 mA 0.70 0.20 0.25 -0.25 Vout=set Vout*0.95 100 80 5 µA 87 87 15 V V uA uA kHz 92 25 % % mS Measuring conditions：Unless otherwise specified , VIN=Vout*0.6，VSS=0V，IOUT=10mA，Topt=25℃。 Note：1、Diode use Schottky diode such as IN5817 or IN5819 (forward voltage drop:0.2V) 2、Inductor：47μH（r