LTC3260EMSE#PBF

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 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. Typical applications are low noise bipolar/inverting supplies, industrial/instrumentation low noise bias, generators, portable medical equipment, portable instruments.

• Inverting charge pump generates –VIN
• 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
• MODE pin internal pull-down current is 0.7µA at VIN = MODE = 32V
• 16-lead plastic MSOP package
• Temperature range from –40°C to 125°C

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