LTC1044

PRODUCTION

LTC1044

Switched Capacitor Voltage Converter

PRODUCTION

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1ku List Price Starting From $2.20

Features

Plug-In Compatible with 7660 with These Additional Features:
- Guaranteed Operation to 9V, with No External Diode, Over Full Temperature Range
- Boost Pin (Pin 1) for Higher Switching Frequency
- Lower Quiescent Power
- Efficient Voltage Doubler

200µA Max. No Load Supply Current at 5V
97% Min. Open Circuit Voltage Conversion Efficiency
95% Min. Power Conversion Efficiency
Wide Operating Supply Voltage Range, 1.5V to 9V
East to Use
Commercial Device Guaranteed Over –40°C to 85°C Temperature Range

Additional Details

The LTC1044 is a monolithic CMOS switched capacitor voltage converter which is manufactured using Analog Devices’ enhanced LTCMOS^™ silicon gate process. The LTC1044 provides several voltage conversion functions: the input voltage can be inverted (V_OUT = –V_IN), doubled (V_OUT = 2V_IN), divided (V_OUT = V_IN/2) or multiplied (V_OUT = ± nV_IN).

Designed to be pin-for-pin and functionally compatible with the popular 7660, the LTC1044 provides significant features and improvements over earlier 7660 designs. These improvements include: full 1.5V to 9V supply operation over the entire operating temperature range, without the need for external protection diodes; two and one-half times lower quiescent current for greater power conversion efficiency; and a “boost” function which is available to raise the internal oscillator frequency to optimize performance in specific applications.

Although the LTC1044 provides significant design and performance advantages over the earlier 7660 device, it still maintains its compatibility with existing 7660 designs.

Applications

Conversion of 5V to ±5V Supplies
Precise Voltage Division, V_OUT = V_IN/2 ±20ppm
Voltage Multiplication, V_OUT = ±nV_IN
Supply Splitter, V_OUT = ±VS/2

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

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FAQs

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Part Models 1

1ku List Price Starting From $2.20

Technical Documents 10

LTC1044: Switched Capacitor Voltage Converter Data Sheet (Rev.A) 08/22/2007

R020 Reliability Data 03/26/2018

AN23 - Micropower Circuits for Signal Conditioning 06/07/2010

AN7 - Some Techniques for Direct Digitization of Transducer Outputs 03/26/2010

AN8 - Power Conditioning Techniques for Batteries 08/20/2007

AN11 - Designing Linear Circuits for 5V Single Supply Operation 03/26/2010

AN43 - Bridge Circuits 07/10/2012

AN30 - Switching Regulator Circuit Collection 10/31/2008

AN-43: Bridge Circuits 11/16/2020

AN-42: Voltage Reference Circuit Collection 09/28/2020

Design Resources 1

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC1044CN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC1044CN8#PBF
Pin/Package Drawing
8-Lead PDIP (Narrow 0.3 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Product Lifecycle

PCN

Oct 11, 2022

- 22_0241

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LTC1044CN8#PBF

PRODUCTION

pdf

PCN22_0241_Form

xls

Material_Report

pdf

Qualification Results Summary

Aug 6, 2022

- 22_0172

Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

LTC1044CN8#PBF

PRODUCTION

pdf

PCN22_0172_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0241

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LTC1044CN8#PBF

PRODUCTION

pdf

PCN22_0241_Form

xls

Material_Report

pdf

Qualification Results Summary

Aug 6, 2022

- 22_0172

Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

LTC1044CN8#PBF

PRODUCTION

pdf

PCN22_0172_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Companion Parts 1

Parts	Product Life Cycle	Description
Unregulated Doubling/Inverting Charge Pumps1
LTC3261	RECOMMENDED FOR NEW DESIGNS	High Voltage, Low Quiescent Current Inverting Charge Pump

LTspice 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.