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  2. Power Management
  3. Inductorless (Charge Pump) DC/DC Converters
  4. GaAsFET Bias Generators
  5. LTC1261L


Overview

Features and Benefits

  • Regulated Negative Voltage from a Single Positive Supply
  • REG Pin Indicates Output is in Regulation
  • Adjustable or Fixed Output Voltages
  • Output Regulation: ±3.5%
  • Supply Current: 650µA Typ
  • Shutdown Mode Drops Supply Current to 5µA
  • Up to 20mA Output Current
  • Requires Only Three or Four External Capacitors
  • Available in MS8 and SO-8 Packages

Product Details

The LTC1261L is a switched-capacitor voltage inverter designed to provide a regulated negative voltage from a single positive supply. The LTC1261L operates from a single 2.7V to 5.25V supply and provides an adjustable output voltage from -1.23V to ±5V. The LTC1261L-4/LTC1261L-4.5 needs a single 4.5V to 5.25V supply and provides a fixed output voltage of -4V to -4.5V respectively. Three external capacitors are required: a 0.1µF flying capacitor and an input and output bypass capacitors. An optional compensation capacitor at ADJ (COMP) can be used to reduce the output voltage ripple.

Each version of the LTC1261L will supply up to 20mA output current with guaranteed output regulation of ±3.5%. The LTC1261L includes an open-drain REG output that pulls low when the output is within 5% of the set value. Quiescent current is typically 650µA when operating and 5µA in shutdown.

The LTC1261L is available in 8-pin MSOP and SO packages.

Applications

  • GaAs FET Bias Generators
  • Negative Supply Generators
  • Battery-Powered Systems
  • Single Supply Applications

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

LTspice

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.

LTspice

Models for the following parts are available in LTspice:

LTC1261
LTC1261CS8
LTC1261CS8-4
LTC1261CS8-4.5
LTC1261LCS8
LTC1261LCS8-4
LTC1261LCS8-4.5

Design Resources

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 Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC1261LCMS8#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LCMS8#TRPBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LCMS8-4#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LCMS8-4#TRPBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LCMS8-4.5#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LCMS8-4.5#TRPBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LCS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LCS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LCS8-4#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LCS8-4#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LCS8-4.5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LCS8-4.5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LIMS8#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LIMS8#TRPBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LIMS8-4#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LIMS8-4#TRPBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LIMS8-4.5#PBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LIMS8-4.5#TRPBF Material Declaration Reliability Data 8-Lead MSOP
LTC1261LIS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LIS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LIS8-4#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LIS8-4#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LIS8-4.5#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1261LIS8-4.5#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
Wafer Fabrication Data R320 Reliability Data

PCN-PDN Information

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Sample & Buy


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Buy Now Pricing


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