Product details


Vin (Min) (V) 2.5 Vin (Max) (V) 5.8 Vout (Min) (V) 1.8 Vout (Max) (V) 11 Iout (Max) (A) 0.04 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 40 Switching frequency (Max) (kHz) 80 Iq (Typ) (mA) 0.65 Features Enable Operating temperature range (C) -40 to 85 Type Charge Pump Rating Catalog open-in-new Find other Charge pumps (inductorless)

Package | Pins | Size

SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 open-in-new Find other Charge pumps (inductorless)


  • 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
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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.

For all available packages, see the orderable addendum at the end of the data sheet.
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Technical documentation

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Type Title Date
* Data sheet LM2665 Switched Capacitor Voltage Converter datasheet (Rev. H) Mar. 22, 2016
White paper The Forgotten Converter Jun. 15, 2015
Technical article Painting a picture for powering high-performance FPGAs Sep. 05, 2013
Technical article Analog Applications Spotlight: Mark Pieper Jun. 06, 2013
Technical article How to choose an LDO or switching regulator May 08, 2013
Technical article Engineer It Video Series: Testing Power Supplies Mar. 26, 2013
More literature Die D/S LM2665 MDA Switched Capacitor Voltage Converter Sep. 20, 2012

Design & development

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Hardware development

document-generic User guide
This evaluation module (EVM) is a complete evaluation system for the bq27z561 battery management system. The EVM includes bq27z561  and bq2980  circuit modules and a link to Windows® based PC software. The circuit modules includes bq27z561 and bq2980 integrated circuits (ICs), and all (...)
  • Easy to use impedance track gas gauge
  • Accurate cell current, temperature and voltage monitoring
  • Over-voltage, under-voltage, over-current, over-temperature and under-temperature protection
  • 1-mOhm sense resistor
  • On-board EV2400
  • On-board dual programmable chargers

Design tools & simulation

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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
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  • Supports simultaneous analysis of multiple products
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SOT-23 (DBV) 6 View options

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