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Dual mode module for SEPIC and inverting regulation

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By Nick Flaherty

One function of the LTM8049 is a SEPIC single-ended primary-inductor converter in which the output voltage is regulated while the input voltage can vary to be less, equal or more than the value of the output voltage. The second function of the LTM8049 is an inverting conversion such that a positive input voltage is converted to a regulated negative output voltage. As a dual regulator, either output can be configured for a combination of SEPIC and/or inverting functions: 

All that is needed to complete the design are input and output capacitors and few resistors, a total of 7 components compared to approximately 30 components needed to design a comparable discrete solution, and the PCB area for the whole solution is only 250mm². Example applications include battery-powered portable test systems, motor drivers and power for operational amplifiers in instrumentation devices.

The LTM8049 operates from 2.6V to 20V input, and each of the two output voltages range from ±2.5V to ±24V. The output current is 1A at 12VIN to 5VOUT, and can be increased by operating the device in parallel. The operating frequency, set via a single external resistor, ranges from 200kHz to 2.5MHz. The LTM8049 can be synchronized by an external clock within the same frequency range. 

The LTM8049 operating temperature range is –40°C to 125°C. 1,000-piece pricing starts at $14.20 each.

www.linear.com/product/LTM8049.


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