LM2665_16 Datasheet, PDF (1/20 Pages) Texas Instruments – Switched Capacitor Voltage Converter

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LM2665
SNVS009H – NOVEMBER 1999 – REVISED MARCH 2016
LM2665 Switched Capacitor Voltage Converter
1 Features
•1 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
2 Applications
• Cellular Phones
• Pagers
• PDAs
• Operational Amplifier Power Suppliers
• Interface Power Suppliers
• Handheld Instruments
• Fire Detection and Notification
• Industrial Handheld Radios
• Blood Pressure Monitors
3 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM2665
SOT-23 (6)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Voltage Doubler
Splitting V_in in Half
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.