LTC1044A - 12V CMOS Voltage Converter

Features

  • 1.5V to 12V Operating Supply Voltage Range
  • 13V Absolute Maximum Rating
  • 200μA Maximum No Load Supply Current at 5V
  • Boost Pin (Pin 1) for Higher Switching Frequency
  • 97% Minimum Open Circuit Voltage Conversion Efficiency
  • 95% Minimum Power Conversion Efficiency
  • IS = 1.5μA with 5V Supply When OSC Pin = 0V or V+
  • High Voltage Upgrade to ICL7660/LTC1044

Typical Application

LTC1044A Typical Application
LTC1044A Typical Application

Description

The LTC®1044A is a monolithic CMOS switched-capacitor voltage converter. It plugs in for ICL7660/LTC1044 in applications where higher input voltage (up to 12V) is needed. The LTC1044A provides several conversion functions without using inductors. The input voltage can be inverted (VOUT = –VIN), doubled (VOUT = 2VIN), divided (VOUT = VIN/2) or multiplied (VOUT = ±nVIN).

To optimize performance in specific applications, a boost function is available to raise the internal oscillator frequency by a factor of seven. Smaller external capacitors can be used in higher frequency operation to save board space. The internal oscillator can also be disabled to save power. The supply current drops to 1.5μA at 5V input when the OSC pin is tied to GND or V+.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC1044ACN8#PBF N-8 N C 05-08-1510 (N8) Yes
LTC1044ACS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1044ACS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1044AIN8#PBF N-8 N I 05-08-1510 (N8) Yes
LTC1044AIS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1044AIS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LTC1044A Package Drawing
LTC1044A Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC1044ACN8#PBF N-8 C $2.75 $2.20 Yes
LTC1044ACS8#PBF SO-8 C $2.92 $2.35 Yes
LTC1044ACS8#TRPBF SO-8 C $2.41 Yes
LTC1044AIN8#PBF N-8 I $3.00 $2.40 Yes
LTC1044AIS8#PBF SO-8 I $3.17 $2.55 Yes
LTC1044AIS8#TRPBF SO-8 I $2.61 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Conversion of 10V to ±10V Supplies
  • Conversion of 5V to ±5V Supplies
  • Precise Voltage Division: VOUT = VIN/2 ±20ppm
  • Voltage Multiplication: VOUT = ±nVIN
  • Supply Splitter: VOUT = ±VS/2
  • Automotive Applications
  • Battery Systems with 9V Wall Adapters/Chargers

Product Notifications

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1044
LTC1044A

Technical Support