LM2663

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2662, LM2663 SNVS002E – JANUARY 1999 – REVISED OCTOBER 2014 LM266x Switched Capacitor Voltage Converter 1 Features 1 Inverts or Doubles Input Supply Voltage 3.5-Ω Typical Output Resistance 86% Typical Conversion Efficiency at 200 mA (LM2662) Selectable Oscillator Frequency: 20 kHz/150 kHz (LM2663) Low Current Shutdown Mode 2 Applications Laptop Computers Cellular Phones Medical Instruments Operational Amplifier Power Supplies Interface Power Supplies Handheld Instruments space space Voltage Inverter 3 Description The LM2662/LM2663 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.5 V to 5.5 V to the corresponding negative voltage. The LM2662/LM2663 uses two low cost capacitors to provide 200 mA of output current without the cost, size, and EMI related to inductor based converters. With an operating current of only 300 μA and operating efficiency greater than 90% at most loads, the LM2662/LM2663 provides ideal performance for battery powered systems. The LM2662/LM2663 may also be used as a positive voltage doubler. The oscillator frequency can be lowered by adding an external capacitor to the OSC pin. Also, the OSC pin may be used to drive the LM2662/LM2663 with an external clock. For LM2662, a frequency control (FC) pin selects the oscillator frequency of 20 kHz or 150 kHz. For LM2663, an external shutdown (SD) pin replaces the FC pi...