LM2682
www.ti.com SNVS044B – NOVEMBER 1999 – REVISED MAY 2013 LM2682 Switched Capacitor Voltage Doubling Inverter
Check for Samples: LM2682 FEATURES 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 ОјA 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. 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 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 …
