Analog Devices Introduced Low IQ Boost/SEPIC/Inverting Converter with 1.5A, 150V Switch

Analog Devices LT8365

Analog Devices has introduced the LT8365 current mode DC/DC converter with a 1.5 A, 150 V switch operating from a 2.8 V to 60 V input. With a unique single feedback pin architecture it is capable of boost, SEPIC or inverting configurations. Burst Mode operation consumes as low as 9 μA quiescent current to maintain high efficiency at very low output currents, while keeping typical output ripple below 15 mV.

400 kHz, -250 V Output Inverting Converter
400 kHz, –250 V Output Inverting Converter.

An external compensation pin allows optimization of loop bandwidth over a wide range of input and output voltages and programmable switching frequencies between 100 kHz and 500 kHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between burst or pulse-skipping modes of operation with or without spread spectrum frequency modulation for low EMI. For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional features include frequency foldback and programmable soft-start to control inductor current during startup.

Switching Waveforms
Switching Waveforms.

The LT8365 is available in a thermally enhanced 16-lead MSOP package with four pins removed for high voltage pin spacings.

Efficiency vs Load Current
Efficiency vs Load Current.

Features

  • Wide Input Voltage Range: 2.8 V to 60 V
  • Ultralow Quiescent Current and Low Ripple Burst Mode Operation: IQ = 9 μA
  • 1.5 A, 150 V Power Switch
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Programmable Frequency (100 kHz to 500 kHz)
  • Synchronizable to an External Clock
  • Spread Spectrum Frequency Modulation for Low EMI
  • BIAS Pin for Higher Efficiency
  • Programmable Undervoltage Lockout (UVLO)
  • Thermally Enhanced 16-lead MSOP Package
  • AEC-Q100 Qualification in Progress

Applications

  • Industrial and Automotive
  • Telecom
  • Medical Diagnostic Equipment
  • Portable Electronics
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