Analog Devices Inc. LT8336 Step-Up Silent Switcher® DC-DC Converter

Analog Devices Inc. LT8336 Step-Up Silent Switcher® DC-DC Converter uses a fixed frequency, current mode control scheme to provide excellent line and load regulation. This low IQ, synchronous DC-DC converter uses Silent Switcher architecture and optional spread-spectrum frequency modulation to minimize EMI emissions while delivering high efficiencies at high switching frequencies. The wide input/output voltage range, low VIN pin quiescent current in Burst Mode operation, and 100% duty cycle capability for the synchronous MOSFET in pass-through operation (VIN ≥ VOUT), make the LT8336 ideally suited for general purpose step-up and automotive pre-boost applications.

The LT8336 integrates 40V, 2.5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. Pulse-skipping or Burst Mode operation can be selected, with or without spread-spectrum frequency modulation, to optimize efficiency and EMI performance. This device also features output soft-start, an output Power Good flag, and output overvoltage lockout.

The Analog Devices Inc. LT8336 DC-DC Converter is available in a compact QFN16 package, and is offered with both a standard -40°C to +125°C and extended -40°C to +150°C operating temperature range.


  • Silent Switcher architecture
    • Ultra-low EMI emissions
    • Optional Spread-Spectrum frequency modulation
  • Integrated 40V, 2.5A power switches
  • Wide 2.7V to 40V input/output voltage range:
  • Low VIN pin quiescent current
    • 0.3µA in Shutdown
    • 4.0µA in Burst Mode® operation
    • 15.0µA in Pass-Through (VIN > VOUT)
  • 100% duty cycle capability for synchronous MOSFET
  • Adjustable and synchronizable 300kHz to 3MHz frequency range
  • Pulse-Skipping or Burst Mode operation at light load
  • Output Soft-Start and Power Good monitor
  • Internal compensation
  • Accurate 1V enable pin threshold
  • Operating temperature range
    • LT8336E: -40°C to +125°C
    • LT8336J, LT8336H: -40°C to +150°C
  • 3.0mm x 3.0mm x 0.94mm LQFN16 package
  • RoHS compliant
  • AEC-Q100 qualification in progress


  • Automotive and industrial power supplies
  • General purpose step-up

Block Diagram

Block Diagram - Analog Devices Inc. LT8336 Step-Up Silent Switcher® DC-DC Converter

Typical Application Circuit

Application Circuit Diagram - Analog Devices Inc. LT8336 Step-Up Silent Switcher® DC-DC Converter


Published: 2020-10-07 | Updated: 2022-03-11