DC/DC Boasts Low IQ

Analog Devices announces the LT8362, a current mode, 2-MHz step-up dc/dc converter with an internal 2A, 60V switch. It employs Burst Mode operation, which reduces quiescent current (IQ) to 9 µA while keeping output ripple below 15 mVP-P. It operates from an input voltage range of 2.8V to 60V, suitable for applications with input sources ranging from a single-cell Li-Ion battery to automotive and industrial inputs.

 

The LT8362 can be configured as either a boost, single-ended primary-inductor converter (SEPIC), or an inverting converter. Its switching frequency can be programmed between 300 kHz and 2 MHz, enabling designers to minimize external component sizes and avoid critical frequency bands, such as AM radio. Furthermore, it offers over 90% efficiency while switching at 2MHz. Burst Mode® operation reduces quiescent current to only 9µA while keeping output ripple below 15mVP-P. The combination of a 3mm x 3mm DFN or high voltage MSOP-16E package and tiny externals ensures a highly compact footprint while minimizing solution cost.

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The LT8362’s 165-mΩ switch delivers efficiencies of over 95%. It also offers spread spectrum frequency modulation to minimize EMI concerns. A single feedback pin sets the output voltage whether the output is positive or negative, minimizing pin count. Other features include external synchronization, programmable UVLO, internal soft-start, frequency foldback and programmable soft-start.

 

Summary of Features:

  • Wide Input Voltage Range: 2.8V to 60V
  • Ultralow Quiescent Current & Low Ripple Burst Mode® Operation: IQ = 9μA
  • 2A, 60V Power Switch
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Programmable Frequency: 300kHz to 2MHz
  • Synchronizable to an External Clock
  • Spread Spectrum Frequency Modulation for Low EMI
  • BIAS Pin for Higher Efficiency
  • Programmable Undervoltage Lockout (UVLO)
  • Thermally Enhanced 10-Lead 3mm × 3mm DFN & High Voltage Pin Spacing Version of 16-Lead MSOP packages   

The LT8362EDD is available in a 3 mm x 3 mm DFN-10 package and the LT8362EMSE is available in a high voltage MSOP-16E (4 pins removed for high voltage). Pricing starts at $2.95 each/1,000. Industrial temperature (–40°C to 125°C) versions, the LT8362IDD and the LT8362IMSE, are also available. High temperature (–40°C to 150°C) versions, the LT8362HDD and the LT8362HMSE, are also available. All versions are available from stock. As if this wasn’t enough, more information and a datasheet.

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