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LTC3260: Low Noise Dual Supply Inverting Charge Pump Data Sheet (Rev. B)9/25/2012PDF1 M
Overview
Features and Benefits
- 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
- AEC-Q100 Qualified for Automotive Applications
Product Details
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 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.
APPLICATIONS
- Low Noise Bipolar/Inverting Supplies
- Industrial/Instrumentation Low Noise Bias Generators
- Portable Medical Equipment
- Portable Instruments
Product Lifecycle
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 (1)
Documentation & Resources
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R526 Reliability Data3/26/2018PDF365 K
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DC1793A - Demo Manual1/21/2014PDF151K
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High Voltage Charge Pump IC Solutions6/23/2017PDF1M
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Charge Pumps Go High Voltage1/14/2014PDF647K
Tools & Simulations
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LTC3260
Design Resources
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Support & Discussions
LTC3260 Discussions
Sample & Buy
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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.