1A, 1.5 MHz, 65V boost/inverter DC/DC converter

September 16, 2014 // By Graham Prophet
LT8580 is a current mode, fixed frequency step-up DC/DC converter with an internal 1A, 65V switch. It operates from an input voltage range of 2.55V to 40V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs.

The LT8580 can be configured as either a boost, SEPIC or an inverting converter. Its switching frequency can be programmed, via a single resistor or synchronised to an external clock, between 200 kHz and 1.5 MHz, minimising external component sizes. The combination of a 3 x 3 mm DFN package (or MSOP-8E) and tiny externals ensures a very compact footprint while reducing solution cost.

The LT8580's low VCESAT switch, 0.4V at 0.75A, delivers efficiencies of up to 86%. Undervoltage lockout (UVLO) is user adjustable for optimal system performance. A single feedback resistor sets the output voltage, minimising external components. Other features include external synchronisation capability, internal soft-start and thermal shutdown protection.

Pricing starts at $2.35 (1,000). piece quantities. Industrial temperature (-40°C to 125°C) versions and high temperature (-40°C to 150°C) versions are also available.

Linear Technology; www.linear.com/product/LT8580