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LTC3260 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3260 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 18 page  LTC3260 1 3260fa Typical applicaTion FeaTures DescripTion Low Noise Dual Supply Inverting Charge Pump 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 operatesoverawide4.5Vto32Vinputrangeandcandeliver 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 us- ing 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. ±12V Outputs from a Single 15V Input LDO Rejection of VOUT Ripple applicaTions n VIN Range: 4.5V to 32V n Inverting Charge Pump Generates –VIN n Charge Pump Output Current Up to 100mA n Low Noise Negative LDO Post Regulator (ILDO– = 50mA Max) n Low Noise Independent Positive LDO Regulator (ILDO+ = 50mA Max) n 100µA Quiescent Current in Burst Mode® Operation with Both LDO Regulators On n 50kHz to 500kHz Programmable Oscillator Frequency n Stable with Ceramic Capacitors n Short-Circuit/Thermal Protection n Low Profile 3mm × 4mm 14-Pin DFN and Thermally Enhanced 16-Pin MSOP Packages n Low Noise Bipolar/Inverting Supplies n Industrial/Instrumentation Low Noise Bias Generators n Portable Medical Equipment n Portable Instruments L , LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 10µF 10µF 1µF 10nF 10nF 10µF 10µF 909k 909k 200k 100k 100k 12V –12V 3260 TA01a LDO+ 15V LDO– ADJ+ LTC3260 RT ADJ– GND BYP+ BYP– VIN VOUT –15V EN+ C– MODE EN– C+ VLDO+ 10mV/DIV AC-COUPLED VLDO– 10mV/DIV AC-COUPLED VOUT 10mV/DIV AC-COUPLED 1µs/DIV 3260 TA01b VIN = 15V VLDO+ = 12V VLDO– = –12V fOSC = 500kHz ILDO+ = 50mA ILDO– –50mA |
Similar Part No. - LTC3260_15 |
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Similar Description - LTC3260_15 |
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