LTC3260 - Low Noise Dual Supply Inverting Charge Pump

Features

  • VIN Range: 4.5V to 32V
  • Inverting Charge Pump Generates –VIN
  • Charge Pump Output Current Up to 100mA
  • Low Noise Negative LDO Post Regulator (ILDO – = 50mA Max)
  • Low Noise Independent Positive LDO Regulator (ILDO + = 50mA Max)
  • 100μA 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 × 4mm 14-Pin DFN and Thermally Enhanced 16-Pin MSOP Packages
Designed for Automotive and Transportation Applications
AEC-Q100 generic family data available for specific packages


Typical Application

LTC3260 Typical Application
LTC3260 Typical Application

Description

The LTC®3260 is a low noise dual polarity output power supply that includes an inverting charge pump with both positive and negative LDO regulators. The charge pump operates over a wide 4.5V to 32V input range and can deliver up to 100mA of output current. Each LDO regulator can provide up to 50mA of output current. The negative LDO post regulator is powered from the charge pump output. The LDO output voltages can be adjusted using external resistor dividers.

The charge pump employs either low quiescent current Burst Mode operation or low noise constant frequency mode. In Burst Mode operation the charge pump VOUT regulates to –0.94 • VIN, and the LTC3260 draws only 100μA of quiescent current with both LDO regulators on. In constant frequency mode the charge pump produces an output equal to –VIN and operates at a fixed 500kHz or to a programmed value between 50kHz to 500kHz using an external resistor. The LTC3260 is available in low profile (0.75mm) 3mm x 4mm 14-pin DFN and thermally enhanced 16-pin MSOP packages.

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
LTC3260EDE#PBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3260EDE#TRPBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3260EMSE#PBF MS-16E MSE E 05-08-1667 Yes
LTC3260EMSE#TRPBF MS-16E MSE E 05-08-1667 Yes
LTC3260HMSE#PBF MS-16E MSE H 05-08-1667 Yes
LTC3260HMSE#TRPBF MS-16E MSE H 05-08-1667 Yes
LTC3260IDE#PBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3260IDE#TRPBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3260IMSE#PBF MS-16E MSE I 05-08-1667 Yes
LTC3260IMSE#TRPBF MS-16E MSE I 05-08-1667 Yes
LTC3260MPMSE#PBF MS-16E MSE MP 05-08-1667 Yes
LTC3260MPMSE#TRPBF MS-16E MSE MP 05-08-1667 Yes


LTC3260 Package Drawing
LTC3260 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
LTC3260EDE#PBF 4x3 DFN-14 E $4.86 $3.40 Yes
LTC3260EDE#TRPBF 4x3 DFN-14 E $3.46 Yes
LTC3260EMSE#PBF MS-16E E $4.86 $3.40 Yes
LTC3260EMSE#TRPBF MS-16E E $3.46 Yes
LTC3260HMSE#PBF MS-16E H $6.06 $4.24 Yes
LTC3260HMSE#TRPBF MS-16E H $4.30 Yes
LTC3260IDE#PBF 4x3 DFN-14 I $5.59 $3.91 Yes
LTC3260IDE#TRPBF 4x3 DFN-14 I $3.97 Yes
LTC3260IMSE#PBF MS-16E I $5.59 $3.91 Yes
LTC3260IMSE#TRPBF MS-16E I $3.97 Yes
LTC3260MPMSE#PBF MS-16E MP $13.11 $9.18 Yes
LTC3260MPMSE#TRPBF MS-16E MP $9.24 Yes
Buy NowRequest Samples
* 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.

Part Number Description Price Documentation
DC1793A LTC3260EMSE Demo Board | Low Noise Dual Supply Inverting Charge Pump Plus ±LDO, 4.5V ≤ VIN ≤ 32V, Vout = ±3.3V/±5V/±12V/±24V/±Adj @ ±50mA $100.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

Please contact your local sales representative for more information regarding reliability reports and AEC-Q100 data or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3260HMSE#PBF MS-16E H $6.06 $4.24 Yes
LTC3260HMSE#TRPBF MS-16E H $4.30 Yes
LTC3260IDE#PBF 4x3 DFN-14 I $5.59 $3.91 Yes
LTC3260IDE#TRPBF 4x3 DFN-14 I $3.97 Yes
LTC3260IMSE#PBF MS-16E I $5.59 $3.91 Yes
LTC3260IMSE#TRPBF MS-16E I $3.97 Yes
LTC3260MPMSE#PBF MS-16E MP $13.11 $9.18 Yes
LTC3260MPMSE#TRPBF MS-16E MP $9.24 Yes
Buy NowRequest Samples
* 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.

Applications

  • Low Noise Bipolar/Inverting Supplies
  • Industrial/Instrumentation Low Noise Bias Generators
  • Portable Medical Equipment
  • Portable Instruments

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Design Tools

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LTC3260

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