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40V, 2A buck-boost converter available in H grade, MP Grade

Posted: 19 Jun 2013 ?? ?Print Version ?Bookmark and Share

Keywords:Linear Technology? buck-boost converter? industrial? automotive?

A high temperature H-grade (-40C to 150C junction temperature) and high reliability MP-grade (-55C to 150C) version of the LTC3115-1 in a 20-lead thermally enhanced TSSOP package has been made available by Linear Technology. The device is a synchronous buck-boost converter that delivers up to 2A of continuous output current from a wide range of power sources from single-cell Li-Ion to 24V/28V industrial rails to 40V automotive inputs.

The LTC3115-1's 2.7V to 40V input and output range provides a regulated output with inputs above, below or equal to the regulated output. The low noise buck-boost topology incorporated in the device provides a continuous, jitter-free transition between buck and boost modes, making it ideal for RF and other noise-sensitive applications that must maintain a low-noise constant output voltage with a variable input power source. Efficiency of up to 95 per cent extends run time in battery powered systems.

The switching frequency in linear's latest offering is user- programmable between 100kHz and 2MHz, and can be synchronised to an external clock. Proprietary buck-boost PWM circuitry ensures low noise and high efficiency while minimising the size of external components. The combination of tiny externals and a TSSOP-20E package provide a compact solution footprint.

The H-grade version operates from -40C to a maximum junction temperature of 150C, guaranteed throughout this temperature range. Similarly, the MP grade version operates from -55C to a maximum junction temperature of 150C, and is guaranteed and tested throughout this temperature range. For both the H grade and the MP grade, the electrical specifications are identical to the industrial grades. They are ideal for automotive, industrial and military applications, which are subject to extreme ambient temperatures.

More information regarding the LTC3115-1 can be found here.

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