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  2. Power Management
  3. Inductorless (Charge Pump) DC/DC Converters
  4. Regulated Inverting Charge Pumps
  5. LTC3265


Overview

Features and Benefits

  • Boost Charge Pump Generates 2 • VIN_P (VIN_P Range: 4.5V to 16V)
  • Inverting Charge Pump Generates –VIN_N (VIN_N Range: 4.5V to 32V)
  • Low Noise Positive LDO Post Regulator Up to 50mA
  • Low Noise Negative LDO Post Regulator Up to 50mA
  • 135μA Quiescent Current in Burst Mode® Operation with Both LDO Regulators On
  • 50kHz to 500kHz Programmable Oscillator Frequency
  • Stable with Ceramic Capacitors
  • Short-Circuit/Thermal Protection
  • Low Profile 3mm × 5mm 18-Lead DFN and Thermally Enhanced 20-Lead TSSOP Packages

Product Details

The LTC3265 is a low noise dual polarity output power supply including a boost charge pump, an inverting charge pump and two low noise positive and negative LDO post regulators. The boost charge pump powers the positive LDO post regulator while the inverting charge pump powers the negative LDO regulator. Each LDO can provide up to 50mA of output current. The LDO output voltages can be adjusted using external resistor dividers.

The charge pumps employ low quiescent current Burst Mode operation or low noise constant frequency mode. During Burst Mode operation, the boost charge pump regulates its output (VOUT +) to 0.94 • 2 • VIN_P while the inverting charge pump regulates its output (VOUT ) to –0.94 • VIN_N. In Burst Mode operation the LTC3265 draws only 135μA of quiescent current with both LDOs on. In constant frequency mode, the boost and inverting charge pumps produce outputs equal to 2 • VIN_P and –VIN_N respectively and operate at a fixed 500kHz or to a programmed value between 50kHz to 500kHz using an external resistor. The LTC3265 is available in low profile 3mm × 5mm × 0.75mm 18-lead DFN and thermally enhanced 20-lead TSSOP packages.

Applications

  • Low Noise Bipolar/Inverting Supplies
  • Industrial/Instrumentation Low Noise Bias Generators

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

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:

LTC3265

Product Recommendations

LTC3265 Companion Parts

Recommended Related Parts

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
LTC3265EDHC#PBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265EDHC#TRPBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265EFE#PBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
LTC3265EFE#TRPBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
LTC3265HDHC#PBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265HDHC#TRPBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265HFE#PBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
LTC3265HFE#TRPBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
LTC3265IDHC#PBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265IDHC#TRPBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265IFE#PBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
LTC3265IFE#TRPBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
LTC3265MPDHC#PBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265MPDHC#TRPBF Material Declaration Reliability Data 18-Lead DFN (5mm x 3mm w/ EP)
LTC3265MPFE#PBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
LTC3265MPFE#TRPBF Material Declaration Reliability Data 20-Lead TSSOP w/ EP
Wafer Fabrication Data R526 Reliability Data

PCN-PDN Information

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Sample & Buy


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Evaluation Boards

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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.