LM2682

LM2682 www.ti.com SNVS044B – NOVEMBER 1999 – REVISED MAY 2013 LM2682 Switched Capacitor Voltage Doubling Inverter Check for Samples: LM2682 FEATURES 1 2 Inverts Then Doubles Input Supply Voltage Small VSSOP Package and SOIC Package 90Ω Typical Output Impedance 94% Typical Power Efficiency at 10 mA APPLICATIONS LCD Contrast Biasing GaAs Power Amplifier Biasing Interface Power Supplies Handheld Instrumentation Laptop Computers and PDAs DESCRIPTION The LM2682 is a CMOS charge-pump voltage inverter capable of converting positive voltage in the range of +2.0V to +5.5V to the corresponding doubled negative voltage of −4.0V to −11.0V respectively. The LM2682 uses three low cost capacitors to provide 10 mA of output current without the cost, size, and EMI related to inductor based circuits. With an operating current of only 150 μA and an operating efficiency greater than 90% with most loads, the LM2682 provides ideal performance for battery powered systems. The LM2682 offers a switching frequency of 6 kHz. Typical Operating Circuit and Pin Configuration 8-Pin VSSOP or 8-Pin SOIC These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers ...