Analog Devices Inc. LT8337/LT8337-1 Silent Switcher® Converter

Analog Devices Inc. LT8337/LT8337-1 Step-Up Silent Switcher® Converter is a low IQ, synchronous step-up DC-DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation (SSFM) 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 PassThru operation (VIN > VOUT) make the LT8337/LT8337-1 ideally suited for battery-powered systems and general-purpose step-up applications.

The LT8337/LT8337-1 integrates 28V, 5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. The LT8337/LT8337-1 features output soft-start and output overvoltage lockout. The LT8337-1 allows external compensation via the VC pin for a fast transient response. The LT8337 offers an output Power Good flag via the PG pin.

The Analog Devices Inc. LT8337/LT8337-1 Silent Switcher is offered in a space-saving LQFN-16 package.


  • Silent Switcher architecture
    • Ultra-low EMI emissions
    • Optional Spread-Spectrum frequency modulation
  • Integrated 28V, 5A power switches
  • Low VIN pin quiescent current
    • 0.3μA in shutdown
    • 4μA in Burst Mode® operation (LT8337)
    • 15μA in PassThru™ (LT8337)
  • 2.7V to 28V wide input voltage range
  • Output voltage programmable up to 26V
  • 100% duty cycle capability for synchronous MOSFET
  • External compensation (fast transient response (LT8337-1))
  • Power Good monitor (LT8337)
  • 300kHz to 3MHz adjustable and synchronizable
  • Pulse-skipping or Burst Mode operation at light load
  • Small 16-lead (3mm × 3mm) LQFN package


  • Battery-powered systems
  • General purpose step-up

Typical Application

Application Circuit Diagram - Analog Devices Inc. LT8337/LT8337-1 Silent Switcher® Converter
Published: 2021-06-23 | Updated: 2022-03-11