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Low-quiescent current multi-mode 2A DC/DC boost converter

Low-quiescent current multi-mode 2A DC/DC boost converter

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By Graham Prophet



The LT8335 can be configured as either a boost, SEPIC or an inverting converter. It uses a fixed 2 MHz switching frequency, enabling designers to minimize 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 package and tiny externals ensures a very compact footprint while minimizing cost.

 

The LT8335’s 170 mΩ switch delivers efficiencies of over 90%, while programmable undervoltage lockout (UVLO) optimizes system performance. A single feedback resistor sets the output voltage whether the output is positive or negative, minimizing external components. Other features include internal compensation, soft-start, frequency foldback and thermal shutdown protection.

 

The LT8335EDDB is available in a 3 x 2 mm DFN-8 package. An industrial temperature (–40°C to 125°C) version, the LT8335IDDB, is also available. Pricing starts at $2.55 (1,000).

 

Linear Technology; www.linear.com/product/LT8335

 

 

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