Voltage Converter. LM2660 Datasheet

LM2660 Converter. Datasheet pdf. Equivalent


Part LM2660
Description Switched Capacitor Voltage Converter
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LM2660
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LM2660
SNVS135E – SEPTEMBER 1999 – REVISED DECEMBER 2014
LM2660 Switched Capacitor Voltage Converter
1 Features
1 Inverts or Doubles Input Supply Voltage
• Narrow SOIC and VSSOP Packages
• 6.5-Ω Typical Output Resistance
• 88% Typical Conversion Efficiency at 100 mA
• Selectable Oscillator Frequency: 10 kHz/80 kHz
• Optional External Oscillator Input
2 Applications
• Laptop Computers
• Cellular Phones
• Medical Instruments
• Operational Amplifier Power Supplies
• Interface Power Supplies
• Handheld Instruments
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3 Description
The LM2660 CMOS charge-pump voltage converter
is a versatile unregulated switched capacitor inverter
or doubler. Operating from a wide 1.5-V to 5.5-V
supply voltage, the LM2660 uses two low-cost
capacitors to provide 100 mA of output current
without the cost, size and EMI related to inductor-
based converters. With an operating current of only
120 µA and operating efficiency greater than 90% at
most loads, the LM2660 provides ideal performance
for battery-powered systems. LM2660 devices can be
operated directly in parallel to lower output
impedance, thus providing more current at a given
voltage.
The FC (frequency control) pin selects between a
nominal 10-kHz or 80-kHz oscillator frequency. The
oscillator frequency can be lowered by adding an
external capacitor to the OSC pin. Also, the OSC pin
may be used to drive the LM2660 with an external
clock up to 150 kHz. Through these methods, output
ripple frequency and harmonics may be controlled.
Additionally, the LM2660 may be configured to divide
a positive input voltage precisely in half. In this mode,
input voltages as high as 11 V may be used.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM2660
SOIC (8)
VSSOP (8)
4.90 mm x 3.91 mm
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
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.



LM2660
LM2660
SNVS135E – SEPTEMBER 1999 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 Handling Ratings....................................................... 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Parameter Measurement Information .................. 8
7.1 Test Circuits .............................................................. 8
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................... 9
8.4 Device Functional Modes........................................ 10
9 Application and Implementation ........................ 11
9.1 Application Information............................................ 11
9.2 Typical Applications ............................................... 11
10 Power Supply Recommendations ..................... 16
11 Layout................................................................... 17
11.1 Layout Guidelines ................................................. 17
11.2 Layout Example .................................................... 17
12 Device and Documentation Support ................. 18
12.1 Device Support .................................................... 18
12.2 Trademarks ........................................................... 18
12.3 Electrostatic Discharge Caution ............................ 18
12.4 Glossary ................................................................ 18
13 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (May 2013) to Revision E
Page
• Added Device Information and Handling Rating tables, Feature Description, Device Functional Modes, Application
and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, and
Mechanical, Packaging, and Orderable Information sections; moved some curves to Application Curves section ............. 1
Changes from Revision C (May 2013) to Revision D
Page
• Changed layout of National Data Sheet to TI format ........................................................................................................... 15
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