99W028A Variable output, negative voltage IC BD6111FV Description Dimension(Units:mm) The BD6111FV is a charge-pump, negative supply IC containing a regulator. The charge pump block inverts a positive power supply voltage that is inputted to VBAT pin into a negative voltage and outputs it from the NEGOUT pin. The regulator block stabilizes this negative voltage with low-noise and outputs it from OUT pin. Output voltage values of this regulator can be controlled by voltage value inputted to VIN pin and determined by OUT=-1.6 VIN . SSOP-B8 Features 1) Highly efficient, built-in inverting charge pump 2) Built-in variable, negative voltage linear regulator. 3) Built-in stand-by switch circuit (pull down resistor 1M Ω) 4) Compact SSOP-B8 package Applications Compact information computer terminal, such as PDC, PHS and PDA. Battery driving apparatus requiring negative voltage. Absolute Maximum Ratings (Ta=25˚C) Parameter Maximum applied power supply voltage Symbol VBAT Maximum applied input voltage VIN Power dissipation Pd Limits -0.3 ~ +6.0 -0.3 ~ +6.0 Unit mW ˚C Operating temperature range Topr 300 * -20 ~ +70 Storage temperature Tstg -55 ~ +125 V V ˚C *Derating:3.0mW/˚C for operation above Ta=25˚C. December, 1999 Recommended Operating Conditions (Ta=25˚C) Parameter Power supply voltage Symbol Min. VBAT 2.5 Typ. - Max. Unit 5.5 V Electrical characteristics (Unless otherwise noted: Ta=25˚C, VBAT=3.6V, STBY=3.6V) Parameter Symbol Min. Typ. Max. Unit Circuit current IQ1 - 0.6 Conditions 3 mA No-load, VIN=1.25V Stand-by current IQ2 - - 5 µA No-load, VIN=0V, STBY=0V Vo -2.1 -2.0 -1.9 V VIN=1.25V, IOUT=10mA dBV VIN=1.25V, IOUT=10mA <Regulator block> Output voltage Output ripple voltage Maximum output current VRR - -70 -60 IoMAX 20 - - mA VIN=1.25V, VOUT 40 mV VIN=1.25V, Io=0~10mA Load stability VOL Input stability VOI - 2 5 40 mV VIN pin inflow current IIN - 0 2 µA fosc - 120 - kHz 1.6 MΩ - V 0.3 V Vo+0.1V VIN=1.25V <Charge pump block> Oscillation frequency Voltage conversion efficiency VCE - 97 Stand-by pin pull down resistor Stand-by pin Operation Control voltage Non-operation RSTBY 0.6 1.0 - VIH 2.0 VIL -0.3 - % No-load, NEGOUT monitor Application circuit C+ VBAT 8 1 C1 CHARGE PUMP GND C4 1µ STBY 2 1µ 7 1M C- 6 3 OUT C3 1.6M 1µ NEGOUT C2 1µ 4 + - 1M + BD6111FV 5 VIN