LTC3260

RECOMMENDED FOR NEW DESIGNS

Low Noise Dual Supply Inverting Charge Pump

Data Sheet (Rev. B) Product Selection Table

Part Models: 14
1ku List Price: Starting From $4.08

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Overview

V_IN Range: 4.5V to 32V
Inverting Charge Pump Generates –V_IN
Charge Pump Output Current Up to 100mA
Low Noise Negative LDO Post Regulator (I_LDO^– = 50mA Max)
Low Noise Independent Positive LDO Regulator (I_LDO⁺ = 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
AEC-Q100 Qualified for Automotive Applications

The LTC3260 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 V_OUT regulates to –0.94 • V_IN, 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 –V_IN 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.

APPLICATIONS

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

Part Models: 14
1ku List Price: Starting From $4.08

Documentation

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
LTC3260EDE#PBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260EDE#TRPBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260EMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260EMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260HMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260HMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260HMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260HMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260IDE#PBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260IDE#TRPBF	14-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260IMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260IMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260MPMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3260MPMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC3260EDE#PBF	PRODUCTION
LTC3260EDE#TRPBF	PRODUCTION
LTC3260IDE#PBF	PRODUCTION
LTC3260IDE#TRPBF	PRODUCTION
Jul 31, 2020 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC3260EDE#PBF	PRODUCTION
LTC3260EDE#TRPBF	PRODUCTION
LTC3260EMSE#PBF	PRODUCTION
LTC3260EMSE#TRPBF	PRODUCTION
LTC3260HMSE#PBF	PRODUCTION
LTC3260HMSE#TRPBF	PRODUCTION
LTC3260IDE#PBF	PRODUCTION
LTC3260IDE#TRPBF	PRODUCTION
LTC3260IMSE#PBF	PRODUCTION
LTC3260IMSE#TRPBF	PRODUCTION
LTC3260MPMSE#PBF	PRODUCTION
LTC3260MPMSE#TRPBF	PRODUCTION
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC3260EMSE#PBF	PRODUCTION
LTC3260EMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LTC3260EMSE#PBF	PRODUCTION
LTC3260EMSE#TRPBF	PRODUCTION
LTC3260HMSE#PBF	PRODUCTION
LTC3260HMSE#TRPBF	PRODUCTION
LTC3260IMSE#PBF	PRODUCTION
LTC3260IMSE#TRPBF	PRODUCTION
LTC3260MPMSE#PBF	PRODUCTION
LTC3260MPMSE#TRPBF	PRODUCTION
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC3260HMSE#PBF	PRODUCTION
LTC3260HMSE#TRPBF	PRODUCTION
LTC3260HMSE#WPBF	PRODUCTION
LTC3260HMSE#WTRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Protection Switches & Controllers 2
LTC4417	RECOMMENDED FOR NEW DESIGNS	Prioritized PowerPath^™ Controller
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3260

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.

Evaluation Kits

LTC3260EMSE Demo Board | Low Noise Dual Supply Inverting Charge Pump Plus ±LDO, 4.5V ≤ VIN ≤ 32V, VOUT = ±3.3V/±5V/±12V/±24V/±Adj @ ±50mA

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Product Details

Demonstration circuit 1793A is a high voltage inverting charge pump with low noise dual-polarity LDO regulators featuring the LTC3260EMSE. The LTC3260 operates with an input voltage from 4.5V to 32V. The demo board provides selectable LDO± output set magnitudes of 3.3V, 5V, 12V and 24V for each polarity. Additional LDO± set point jumper selections and optional topside ADJ± resistors allow the user to set other desired LDO± output voltages. The demo board also provides the means to select between Burst Mode^® operation or constant-frequency mode operation, plus select an operating frequency of 500kHz, 200kHz, and 50kHz.