LM2665 Series

1.8-V to 5.5-VIN switched capacitor voltage doubler

Catalog

1.8-V to 5.5-VIN switched capacitor voltage doubler

Part	Operating Temperature [Min]	Operating Temperature [Max]	Function	Frequency - Switching	Output Configuration	Current - Output	Package / Case	Voltage - Input (Min) [Min]	Synchronous Rectifier	Voltage - Input (Max) [Max]	Supplier Device Package	Voltage - Output (Min/Fixed)	Voltage - Output (Min/Fixed)	Mounting Type	Output Type	Number of Outputs
Texas Instruments LM2665M6X/NOPB	-40 °C	85 °C	Ratiometric	80 kHz	Positive	40 mA	SOT-23-6	2.5 V		5.5 V	SOT-23-6	2Vin	Vin/2	Surface Mount	1.81 mOhm	1
Texas Instruments LM2665M6/NOPB	-40 °C	85 °C	Ratiometric	80 kHz	Positive	40 mA	SOT-23-6	2.5 V		5.5 V	SOT-23-6	2Vin	Vin/2	Surface Mount	1.81 mOhm	1

Catalog

1.8-V to 5.5-VIN switched capacitor voltage doubler

Key Features

• Input Voltage for Voltage Doubler: 2.5 V to 5.5 VVoltage Divider Splits Voltage: 1.8 V to 11 VDoubles or Splits Input Supply Voltage12-Ω Typical Output Impedance90% Typical Conversion Efficiency at 40 mA1-µA Typical Shutdown CurrentInput Voltage for Voltage Doubler: 2.5 V to 5.5 VVoltage Divider Splits Voltage: 1.8 V to 11 VDoubles or Splits Input Supply Voltage12-Ω Typical Output Impedance90% Typical Conversion Efficiency at 40 mA1-µA Typical Shutdown Current

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) and1-µA typical shutdown current, the LM2665 provides ideal performance for battery powered systems. 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) and1-µA typical shutdown current, the LM2665 provides ideal performance for battery powered systems.