LTC3260 Low Noise Dual Supply Inverting Charge Pump Fea T Descrip T n V Range: 4.5V to 32V The LTC 3260 is a low noise dual polarity output power IN n Inverting Charge Pump Generates V supply that includes an inverting charge pump with both IN n Charge Pump Output Current Up to 100mA positive and negative LDO regulators. The charge pump n Low Noise Negative LDO Post Regulator operates over a wide 4.5V to 32V input range and can deliver (I = 50mA Max) up to 100mA of output current. Each LDO regulator can LDO n Low Noise Independent Positive LDO Regulator provide up to 50mA of output current. The negative LDO + (I = 50mA Max) post regulator is powered from the charge pump output. LDO n 100A Quiescent Current in Burst Mode Operation The LDO output voltages can be adjusted using external with Both LDO Regulators On resistor dividers. n 50kHz to 500kHz Programmable Oscillator Frequency The charge pump employs either low quiescent current n Stable with Ceramic Capacitors Burst Mode operation or low noise constant frequency n Short-Circuit/Thermal Protection mode. In Burst Mode operation the charge pump V OUT n Low Profile 3mm 4mm 14-Pin DFN and Thermally regulates to 0.94 V , and the LTC3260 draws only IN Enhanced 16-Pin MSOP Packages 100A of quiescent current with both LDO regulators on. In constant frequency mode the charge pump produces an output equal to V and operates at a fixed 500kHz a T IN or to a programmed value between 50kHz to 500kHz us- n Low Noise Bipolar/Inverting Supplies ing an external resistor. The LTC3260 is available in low n Industrial/Instrumentation Low Noise Bias profile (0.75mm) 3mm x 4mm 14-pin DFN and thermally Generators enhanced 16-pin MSOP packages. n Portable Medical Equipment L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the Portable Instruments property of their respective owners. Typical a T LDO Rejection of V Ripple OUT 12V Outputs from a Single 15V Input + + V 15V V LDO 12V LDO IN 10mV/DIV 10F 10F 909k LTC3260 AC-COUPLED + + EN ADJ V LDO + 10mV/DIV EN BYP 100k 10nF AC-COUPLED MODE GND V OUT 10nF + 10mV/DIV 100k C BYP 1F AC-COUPLED C ADJ 909k 3260 TA01b V = 15V 1s/DIV IN 12V + 15V V LDO OUT V = 12V LDO 10F 10F RT V = 12V LDO 3260 TA01a f = 500kHz OSC + 200k I = 50mA LDO I 50mA LDO 3260fa 1 ion pplica ions pplica ion uresLTC3260 a T e Maxi Mu M r a T (Notes 1, 3) + + V , EN , EN , MODE............................... 0.3V to 36V V , LDO , LDO Short-Circuit Duration ........ Indefinite IN OUT + LDO ...........................................................16V to 36V Operating Junction Temperature Range V , LDO ............................................... 36V to 0.3V (Note 2) .................................................. 55C to 150C OUT + RT, ADJ ...................................................... 0.3V to 6V Storage Temperature Range ................. 65C to 150C + BYP ......................................................... 0.3V to 2.5V Lead Temperature (Soldering, 10 sec) ADJ ............................................................ 6V to 0.3V MSE Only ..........................................................300C BYP ......................................................... 2.5V to 0.3V p c F T TOP VIEW TOP VIEW + + EN 1 14 BYP + + + EN 1 16 BYP RT 2 13 ADJ + RT 2 15 ADJ BYP 3 12 MODE BYP 3 14 MODE 15 ADJ 4 17 13 EN ADJ 4 11 EN + GND LDO 5 GND 12 LDO + LDO 5 10 LDO V 6 11 V OUT IN + C 7 10 C V 6 9 V OUT IN NC 8 9 NC + C 7 8 C MSE PACKAGE 16-LEAD PLASTIC MSOP DE PACKAGE T = 150C, = 43C/W JMAX JA 14-LEAD (4mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB T = 150C, = 43C/W JMAX JA EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3260EDE PBF LTC3260EDE TRPBF 3260 14-Lead (4mm 3mm) Plastic DFN 40C to 125C LTC3260IDE PBF LTC3260IDE TRPBF 3260 14-Lead (4mm 3mm) Plastic DFN 40C to 125C LTC3260EMSE PBF LTC3260EMSE TRPBF 3260 16-Lead Plastic MSOP 40C to 125C LTC3260IMSE PBF LTC3260IMSE TRPBF 3260 16-Lead Plastic MSOP 40C to 125C LTC3260HMSE PBF LTC3260HMSE TRPBF 3260 16-Lead Plastic MSOP 40C to 150C LTC3260MPMSE PBF LTC3260MPMSE TRPBF 3260 16-Lead Plastic MSOP 55C to 150C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: