Description
●The LM2665 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of 2.5 V to 5.5 V. Two low-cost capacitors and a diode (needed during start-up) are used in this circuit to provide up to 40 mA of output current. The LM2665 can also work as a voltage divider to split a voltage in the range of 1.8 V to 11 V in half.
●The LM2665 operates at 160-kHz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 650 µA (operating efficiency greater than 90% with most loads) and 1-µA typical shutdown current, the LM2665 provides ideal performance for battery powered systems.
●Features
●• Input Voltage for Voltage Doubler: 2.5 V to 5.5 V
●• Voltage Divider Splits Voltage: 1.8 V to 11 V
●• Doubles or Splits Input Supply Voltage
●• 12-Ω Typical Output Impedance
●• 90% Typical Conversion Efficiency at 40 mA
●• 1-µA Typical Shutdown Current
●Applications
●• Cellular Phones
●• Pagers
●• PDAs
●• Operational Amplifier Power Suppliers
●• Interface Power Suppliers
●• Handheld Instruments
●• Fire Detection and Notification
●• Industrial Handheld Radios
●• Blood Pressure Monitors
