LM2665
开关电容器电压转换器
The 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.
For all available packages, see the orderable addendum at the end of the data sheet.
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- Input Voltage for Voltage Doubler: 2.5 V to 5.5 V
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- Voltage Divider Splits Voltage: 1.8 V to 11 V
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- Doubles or Splits Input Supply Voltage
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- 12-Ω Typical Output Impedance
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- 90% Typical Conversion Efficiency at 40 mA
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- 1-µA Typical Shutdown Current