1A, 2 MHz, 60V boost/SEPIC/inverting DC/DC converter, 6µA Iq

September 15, 2015 // By Graham Prophet
LT8330 is a current mode, 2 MHz step-up DC/DC converter with an internal 1A, 60V switch. It operates from an input voltage range of 3V to 40V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs.

The device can be configured as either a boost, SEPIC or an inverting converter. It uses a fixed 2 MHz switching frequency, enabling designers to minimise external component sizes and avoid critical frequency bands, such as AM radio. Burst Mode operation reduces quiescent current to 6 µA while keeping output ripple below 15 mVP-P. The combination of a 3 x 2 mm DFN or TSOT-23 package and tiny externals ensures a very compact footprint while minimising overall cost.

The LT8330’s 330 mΩ switch delivers efficiencies of up to 90%. An accurate 1.6V EN/UVLO pin threshold allows undervoltage lockout (UVLO) to be programmed for optimal system performance. A single feedback pin enables programming of positive or negative output voltages. Other features include internal compensation, soft-start, frequency foldback and thermal shutdown protection.

The LT8330EDD is available in a 3 x 2 mm DFN-8 package and the LT8330ES6 in a TSOT-23 package. Pricing starts at $2.50 (1000). Industrial temperature and high-temperature vrsions are produced.

Linear Technology; www.linear.com/product/LT8330