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| Operating Voltage Range 1.2V to 5.0V Highly Efficient 90% Low Power Consumption 310A ( 120kHz ) CE ( Chip Enable ) function SOT - 26 Package General Description The XC6351A series are charge pump voltage inverter ICs that have 4 MOSFETs built in. Since highly efficient negative voltages can be generated with only 2 external capacitors connected, GaAs bias power supplies & OpAmp's negative power supplies etc., can be easily accomodated on a standard PCB. A mini-molded, 6 pin, SOT-26 package provides for space saving and makes high density mounting possible. Low power consumption and high efficiency make this series perfect for use with battery operated applications. Since the IC's operations stop when output is shutdown via the CE (chip enable) function, total power consumption reduction is possible in applications which use this IC. Applications Cellular and portable phones Miniature LCD panels Palmtop computers, PDAs Various battery powered systems Features Operating Voltage Range : Oscillator Frequency : Low Supply Current : High Efficiency : Stand-by Current : Ultra Small Package : 1.2V to 5.0V 120kHz 35kHz ( custom ) 310 A ( typ ) 100 A ( typ ; 35kHz ) 90% (typ) ( RL = 2k ) 2.0 A (max.) SOT-26 mini mold r Pin Assignment PIN NUMBER SYMBOL FUNCTION Absolute Maximum Ratings Ta = 25 C, GND = 0V O PARAMETER VIN input voltage VOUT pin voltage C1+ pin voltage C1- pin voltage CE/ pin voltage OUT pin current Continuous Total Power Dissipation Ambient Operating Temperature Storage Temperature SYMBOL VIN VOUT C1+ C1CE/ IOUT Pd Topr Tstg RATINGS 6 -6 to 0.3 -0.3 to VIN+0.3 VOUT-0.3 to +0.3 -0.3 to VIN+0.3 50 150 -30 to +80 -40 to +125 UNITS V V V V V mA mW O 1 2 3 4 5 6 GND CE/ C1+ VOUT V IN C1- Ground Chip Enable (-ve logic) External Capacitor +Pin Reverse Output Pin Power Supply Pin External Capacitor -Pin C C O Pin Configuration, Application Circuit C1 6 V IN Block Diagram C 1+ C1- VO U T 4 5 P1 VIN N2 1 GND 2 C E/ 3 C1+ N3 C E/ C hip E nable N4 VOUT SOT-26 (TOP VIEW) Oscillator B uffer G ND Note : 1. In operation, the following conditions will be repeated alternately : P1 & N3 ON : N2 & N4 OFF P1 & N3 OFF : N2 & N4 ON 2. In standby mode, P1, N3 & N4 will be ON and N2 will be OFF. The output pin VOUT will be connected to GND. Electrical Characteristics FOSC = 120kHz PARAMETER Supply Current Operating Voltage Range Oscillation Frequency Power Transition Efficiency Voltage Transition Efficiency Output Impedence Stand -By Current CE/ 'H' Level Voltage CE/ 'L' Level Voltage Measuring Conditions : Unless otherwise stated, VIN = 5.0V, CE/ = 0V RL = 2k RL = RL = 5k RL = 5k CONDITIONS SYMBOL IDD VIN FOSC EFFI VEFFI ROUT ISTB VCEH VCEL 0.9 0.25 95 45 90 2.0 MIN 1.2 75 120 90 TYP 310 MAX 520 5.0 192 Ta = 25 C O UNITS A V kHz % % A V V CIRCUIT 1 2 1 2 2 2 3 3 3 CE/ = VIN 8 Standard Circuit r VD D C2 + C E/ VO U T RL VIN CIN + C1 + C+ CGND Peripherals : CIN = 1F (ceramic capacitor) C1 = C2 = 1 F (ceramic capacitor)* * With the custom 35kHz frequency, C1 = C2 = 3.3 F Notes on Use 1. Please use the IC & peripherals within the specified electrical characteristic ranges and ensure that absolute maximum ratings are not exceeded. 2. For C1 & C2, please use a capacitor with as small an ESR value as possible. 3. In order to reduce impedance between the IC's input pin and the power supply, we recommend that a capacitor (CIN) be connected to the input side. 4. If an external power supply is applied to the output pin in order to have VOUT connected to GND during standby, large current flows through the IC are a possibility. Further, do not use a capacitor at C2 that has a large capacitance value. Ordering Information XC6351A 1 2 3 4 5 SYMBOL 123 4 5 120 035 M R L DESCRIPTION Oscillation frequency 120kHz Oscillation frequency 35kHz (custom) Package SOT-26 Embossed Tape Standard feed Embossed Tape Reverse feed s Measurement Circuits Circuit 1 A w av eform m eas u rem en t VDD C+ CGND CE/ VOUT V IN C IN + r Circuit 2 A VDD V IN C IN + C1 + C+ CGND CE/ VOUT C2 + RL V A Circuit 3 A w av eform m ea su rem en t VDD C+ CGND CE/ V OUT CE/ V IN C IN + Peripherals : CIN = 1 F (ceramic capacitor) C1 = C2 = 1F (ceramic capacitor)* * With the custom 35kHz frequency, C1 = C2 = 3.3 F Electrical Characteristics (1) Output Voltage vs. Output Current r (2) Efficiency vs. Output Current (3) Oscillation Frequency vs. Ambient Temperature (4) Oscillation Frequency vs. Input Voltage |
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